Crossed Intramolecular Rauhut-Currier-Type Reactions via Dienamine Activation
|
|
- ŌἈμώς Δουρέντης
- 5 χρόνια πριν
- Προβολές:
Transcript
1 Crossed Intramolecular Rauhut-Currier-Type Reactions via Dienamine Activation Eugenia Marqués-López, Raquel P. Herrera, Timo Marks, Wiebke C. Jacobs, Daniel Könning, Renata M. de Figueiredo, Mathias Christmann* Organic Chemistry, Dortmund University of Technology, Otto-Hahn-Str. 6, Dortmund, 44227, Germany Fax: , Supporting Information Table of Contents General experimental methods 3 Synthesis of starting materials 4 (2E)-5-(3,3-Dimethyloxiranyl)-3-methylpent-2-enyl acetate (15) 4 (2E)-3-Methyl-6-oxohex-2-enyl acetate (16) 4 (2Z,6E)-3-Methyl-8-oxonona-2,6-dienyl acetate (18) 5 (2E,6E)-8-Hydroxy-3-methylnona-2,6-dienyl acetate (19) 5 (2E,6E)-3-Methylnona-2,6-dien-1,8-diol () 6 (2E,6E)-3-Methyl-8-oxonona-2,6-dienal (6a) 6 (2E,6E)-3-Methyl-8-oxo-8-phenylocta-2,6-dienyl acetate (22) 7 (2E,6E)-8-Hydroxy-3-methyl-8-phenylocta-2,6-dienyl acetate (23) 7 (2E,6E)-6-Methyl-1-phenylocta-2,6-dien-1,8-diol (24) 8 (2E,6E)-3-Methyl-8-oxo-8-phenylocta-2,6-dienal (6b) 9 [(p-nitrobenzyl)methylene]triphenylphosphoran (25) 9 (2E,6E)-3-Methyl-8-(4-nitrophenyl)-8-oxoocta-2,6-dienyl acetate (26) 10 (2E,6E)-8-Hydroxy-3-methyl-8-(4-nitrophenyl)octa-2,6-dienyl acetate (27) 10 (2E,6E)-6-Methyl-1-(4-nitrophenyl)octa-2,6-diene-1,8-diol (28) 11 (2E,6E)-3-Methyl-8-(4-nitrophenyl)-8-oxoocta-2,6-dienal (6c) 12 [(p-naphtylbenzyl)methylene]triphenylphosphoran (29) 12 (2E,6E)-3-Methyl-8-(naphthalen-2-yl)-8-oxoocta-2,6-dienyl acetate (30) 13 (2E,6E)-8-Hydroxy-3-methyl-8-(naphthalen-2-yl)octa-2,6-dienyl acetate (31) 13 (2E,6E)-6-Methyl-1-(naphthalen-2-yl)octa-2,6-diene-1,8-diol (32) 14 (2E,6E)-3-Methyl-8-(naphthalen-2-yl)-8-oxoocta-2,6-dienal (6d) 15 [(p-chlorobenzyl)methylene]triphenylphosphoran (33) 15 (2E,6E)-8-(4-Chlorophenyl)-3-methyl-8-oxoocta-2,6-dienyl acetate (34) 16 S-1
2 (2E,6E)-8-(4-Chlorophenyl)-8-hydroxy-3-methylocta-2,6-dienyl acetate (35) 16 (2E,6E)-1-(4-Chlorophenyl)-6-methylocta-2,6-diene-1,8-diol (36) 17 (2E,6E)-8-(4-Chlorophenyl)-3-methyl-8-oxoocta-2,6-dienal (6e) 18 [(p-methoxybenzyl)methylene]triphenylphosphoran (37) 18 (2E,6E)-8(4-Methoxyphenyl)-3-methyl-8-oxo-8-oxoocta-2,6-dienyl acetate (38) 19 (2E,6E)-8-Hydroxy-8-(4-methoxyphenyl)-3-methylocta-2,6-dienyl acetate (39) 19 (2E,6E)-1-(4-Methoxyphenyl)-6-methylocta-2,6-dien-1,8-diol () (2E,6E)-8-(4-Methoxyphenyl)-3-methyl-8-oxoocta-2,6-dienal (6f) 21 (E)-6-Hydroxy-3-methyl-7-nitrohept-2-enyl acetate (41) 21 (2E,6E)-3-Methyl-7-nitrohepta-2,6-dienyl acetate (42) 22 (2E,6E)-3-Methyl-7-nitrohepta-2,6-dienal (6g) 22 (2E,6E)-Methyl-8-acetoxy-6-methylocta-2,6-dienoate (45) 23 (2E,6E)-3-Methyl-octa-2,6-dien-1,8-diol (46) 24 (2E,6E)-3-Methylocta-2,6-diendial (6h) 24 Organocatalytic enantioselective cyclization of enals 7a-h 25 General procedure 25 (R)-2-Methyl-5-(2-oxopropyl)cyclopent-1-encarbaldehyde (7a) 25 (R)-2-Methyl-5-(2-oxo-2-phenylethyl)cyclopent-1-encarbaldehyde (7b) 26 (R)-2-Methyl-5-(2-(4-nitrophenyl)-2-oxoethyl)cyclopent-1-enecarbaldehyde (7c) 26 (R)-2-Methyl-5-(2-(naphthalen-2-yl)-2-oxoethyl)cyclopent-1-enecarbaldehyde (7d) 27 (R)-2-Methyl-5-(2-(4-chlorophenyl)-2-oxoethyl)cyclopent-1-enecarbaldehyde (7e) 27 (R)-5-(2-(4-Methoxyphenyl)-2-oxoethyl)2-methylcyclopent-1-encarbaldehyde (7f) 27 (S)-2-Methyl-5-(nitromethyl)cyclopent-1-enecarbaldehyde (7g) 28 (R)-Rotundial [(R)-2-methyl-5-(2-oxoethyl)cyclopent-1-enecarbaldehyde] (7h) 28 (R)-Rotundiol [(R)-2-(2-(hydroxymethyl)-3-methylcyclopent-2-enyl)ethanol] (47) 29 (R)-2-(3-Methyl-2-((4-nitrobenzyloxy)methyl)cyclopent-2-enyl)ethyl-4-nitrobenzoate (48) 29 X-ray structures 30 NMR Spectra 31 HPLC Analysis of products 7a-h 79 References and notes 89 S-2
3 GENERAL EXPERIMENTAL METHODS Solvents of HPLC grade were purchased from Fisher Scientific or VWR (Prolabo). Where dry solvents (Et 2 O, CH 2 Cl 2, toluene, DMF or THF) were required they were purified by Solvent Purification Systems M-BRAUN Glovebox Technology SPS-0. Technical quality solvents for column chromatography were used after short path distillation in a rotary evaporator. Catalysts I- VII were purchased from Alfa Aesar or Aldrich and used without further purification [L-Proline (I) (99%), (S)-( )-α,α-diphenylprolinol (II) (98%), (S)-α,α-bis[3,5-bis(trifluoromethyl)phenyl]-2- pyrrolidinemethanol (III) (99%), (S)-( )-α,α-diphenyl-2-pyrrolidinemethanol trimethylsilyl ether (IV) (95%), (R)-(+)-α,α-diphenyl-2-pyrrolidinemethanol trimethylsilyl ether (IV) (96%), (S)-α,α- Bis[3,5-bis(trifluoromethyl)phenyl]-2-pyrrolidinemethanol trimethylsilyl ether (V) (97%), (S)-2- (methoxydiphenylmethyl)pyrrolidine (VI) (95%) and (S)-( )-2-(diphenylmethyl)pyrrolidine (VII) (97%)]. Unless noted below, all other compounds were reported in literature or were supplied by Aldrich, Acros or AlfaAesar, and used without further purification. Thin-layer chromatography (SiO2, TLC) was performed on Merck TLC silica gel F 254. Column chromatography was performed on Merck silica gel ( nm), using standard flash chromatographic methods. Chiral HPLC analysis was performed using an Agilent 10 series HPLC with a diode array detector. Chiral columns include Daicel Chiralpak IA (Chiral Technologies Eur., 25 cm 4.6 mm I.D.), Daicel Chiralpak IB (Chiral Technologies Eur., 25 cm 4.6 mm I.D.) and Nucleocel Delta S (Macherey-Nagel, 25 cm 4.6 mm). Melting points were measured out on a Büchi B-5 block apparatus and are uncorrected. Optical rotations were recorded on a Perkin Elmer polarimeter 341 at 589 nm, and were reported as [α] D (concentration). The NMR spectra were recorded on Bruker DRX300 (300 MHz) DRX0 (0 MHz) or DRX500 (500 MHz) spectrometers and were referenced against the residual solvent peaks [CHCl 3 : δ 7.26 ppm ( 1 H NMR) and ppm ( 13 C NMR) and CD 3 OD: δ 3.31 ppm ( 1 H NMR) and 40 ppm ( 13 C NMR)] or using an external reference for 31 P NMR (H 3 PO 4, 0.0 ppm). Chemical shifts are reported in parts per million as follows: chemical shift, multiplicity (s = singlet, d = doublet, t = triplet, q = quartet, m = multiplet, br = broad), coupling constant, and integration. Infrared spectra were recorded on a Nicolet Impact 0D spectrometer on potassium bromide matrix (disk or film). Low resolution mass spectra were performed on a Thermo TSQ mass spectrometer for ESI-MS; or on a GC System, Hewlett Packard 6890 series/mass selective detector, Hewlett Packard 5973 (column: HP-5MS (J&W Scientific, Agilent); 25 m, 0.2 mm I.D., film 0.33 µm) for GC-EI-MS. High resolution mass spectra were recorded on a LTQ Orbitrap mass spectrometer coupled to an Accela HPLC-System (HPLC column: Hypersyl GOLD, 50 mm 1 mm, 1.9 µm) for HPLC-ESI-HRMS; or on a DFS-High resolution Magnetic Sector MS (Double Focusing Mass Spectrometer) for DI-EI-HRMS (Direct inlet EI-HRMS) or coupled to a Trace GC Ultra 00 (column: DB-5MS (J&W Scientific, Agilent); S-3
4 25 m, 0.25 mm I.D., film 0.1 µm) for GC-EI-HRMS and for GC-CI-HRMS. All instruments are from Thermo Electron. Elemental analyses were recorded on an automatic Leco CHNS-932 elemental analyzer. SYNTHESIS OF STARTING MATERIALS (2E)-5-(3,3-Dimethyloxiranyl)-3-methylpent-2-enyl acetate (15) [1] To a stirred solution of geranyl acetate 14 (9. g, 50.1 mmol) in CH 2 Cl 2 ( ml) at 0 C a solution of m-cpba (70-75%, Acros; 12.4 g, 50.3 mmol) was added and stirred for 1 h. After warming up the reaction mixture to r.t. an aqueous solution of NaOH ( M, 25 ml) was added. The aqueous phase was extracted with CH 2 Cl 2 (3 x 25 ml). The combined organic phases were washed with brine (2 x 30 ml), dried over MgSO 4 and the solvent was removed under reduced pressure after filtration. The residue was purified by flash chromatography (SiO 2, hexane/etoac 5:1) to afford 15 [1] (10.5 g, 99%) as yellow oil: 1 H NMR (0 MHz, CDCl 3 ) δ (m, 1H), 4.58 (d, J = 7.2 Hz, 2H), 2.69 (t, J = 6.4 Hz, 1H), (m, 2H), 4 (s, 3H), 1.71 (s, 3H), (m, 2H), 1.29 (s, 3H), 1.25 (s, 3H). 13 C NMR ( MHz, CDCl 3 ) δ 171.1, 141.3, 118.8, 63.9, 61.2, 58.4, 36.1, 2, 24.8, 2, 18.7, (2E)-3-Methyl-6-oxohex-2-enyl acetate (16) [1] To a stirred solution of HIO 4 2H 2 O (13.7 g,.1 mmol) in H 2 O (50 ml) at 0 C a solution of (2E)- 5-(3,3-dimethyl-oxiranyl)-3-methyl-pent-2-enyl acetate 15 (11.4 g, 53.7 mmol) in THF ( ml) was added and stirred for 1 h. Then brine ( ml) was added, and the aqueous phase was extracted with Et 2 O (3 x ml). The combined organic phases were washed with a saturated aqueous solution of NaHCO 3 (3 x ml), and brine (3 x ml), dried over MgSO 4. The filtrate was concentrated under reduced pressure and the residue was purified by flash chromatography (SiO 2, hexane/etoac 4:1) to afford 16 [1] (7. g, 85%) as yellow oil: 1 H NMR (0 MHz, CDCl 3 ) δ 9.77 (t, J = 1.6 Hz, 1H), (m, 1H), 4.56 (d, J = 7.2 Hz, 2H), (m, 2H), 2.37 (t, J = 7.6 S-4
5 Hz, 2H), 4 (s, 3H), 1.71 (s, 3H). 13 C NMR ( MHz, CDCl 3 ) δ 1.7, 17,, 119.2, 6, 41.7, 31.4, 2, (2Z,6E)-3-Methyl-8-oxonona-2,6-dienyl acetate (18) To a stirred solution of (E)-3-methyl-6-oxohex-2-enyl acetate 16 (0 g, 11.8 mmol) in THF ( ml), 1-(triphenylphosphoranylidene)acetone 17 (15.1 g, 4 mmol) was added in one portion and stirred for 16 h at C. After filtration of the white solid, the solvent was removed under reduced pressure. The residue was purified by flash chromatography (SiO 2, pentane/etoac 4:1) to afford 18 in (2. g, 96%) as yellow oil: 1 H NMR (0 MHz, CDCl 3 ) δ 6.75 (dt, J = 1, Hz, 1H), 5 (d, J = 1 Hz, 1H), 5.35 (t, J = Hz, 1H), 4.56 (d, J = Hz, 2H), (m, 2H), 2.22 (s, 3H), (m, 2H), 3 (s, 3H), 1.70 (s, 3H). 13 C NMR ( MHz, CDCl 3 ) δ 198.6, 17, 147.2, 1.4, 131.5, 119.4, 61.1, 37.7, 30.4, 26.8, 2, IR (KBr film) (cm -1 ) ν 2967, 2925, 1735, 1674, 1629, 1371, 1259, 1097, 1021, 799. ESI-MS m/z (%) 233 () [M+Na] +. HPLC-ESI- HRMS ([M+H] + ) calcd for C 12 H 19 O , found (2E,6E)-8-Hydroxy-3-methylnona-2,6-dienyl acetate (19) [2] To a stirred solution of (2E,6E)-3-methyl-8-oxonona-2,6-dienyl acetate 18 (952 mg, 4.53 mmol) and CeCl 3 7H 2 O (2.10 g, 5.71 mmol) in MeOH (45 ml) at 0 C, NaBH 4 was added in three portions (2 mg, 6.25 mmol) and stirred for 2 h at r.t. After the addition of acetone (6 ml) and HCl (0.5 M, 50 ml) the aqueous phase was extracted with EtOAc (4 x ml). The combined organic phases were washed with brine ( ml), dried over MgSO 4 and the solvent was removed under reduced pressure after filtration. The residue was purified by flash chromatography (SiO 2, toluene/etoac 5:1) to afford 19 (749 mg, 78%) as yellow oil: 1 H NMR (500 MHz, CDCl 3 ) δ (m, 2H), 5.29 (t, J = 7.5 Hz, 1H), (m, 2H), (m, 1H), (m, 4H), S-5
6 (s, 3H), (m, 1H), 1.65 (s, 3H), 1. (dd, J =, Hz, 3H). 13 C NMR (125 MHz, CDCl 3 ) δ 17, 141.3, 134.8, 129.6, 118.8, 68.6, 61.3, 38.8, 30.0, 23.3,.9, IR (KBr film) (cm -1 ) ν 3431, 2971, 2929, 1738, 1448, 1367, 1233, 1062, 1024, 967. ESI-MS m/z (%) 235 [M+Na] +. HPLC-ESI-HRMS ([M+Na] + ) calcd for C 12 H O 3 Na , found (2E,6E)-3-Methylnona-2,6-diene-1,8-diol () [1b] To a stirred solution of (2E,6E)-8-hydroxy-3-methylnona-2,6-dienyl acetate 19 (792 mg, 3.73 mmol) in MeOH (7.5 ml), K 2 CO 3 (4 mg, 370 µmol) was added and stirred for 4 h at r.t. Then H 2 O (5 ml) was added and extracted with EtOAc (4 x ml). The combined organic phases were washed with an aqueous solution of HCl ( M, ml), saturated aqueous solution of NaHCO 3 ( ml), and brine ( ml), dried over MgSO 4 and the solvent was removed under reduced pressure after filtration. The residue was purified by flash chromatography (SiO 2, pentane/etoac 2:1 1:1 1:4) to afford (533 mg, 84%) as yellow oil: 1 H NMR (500 MHz, CDCl 3 ) δ (m, 1H), (m, 1H), 5.37 (t, J = 7.5 Hz, 1H), (m, 1H), (m, 2H), (m, 6H), 1.65 (s, 3H), 1.23 (dd, J =, Hz, 3H). 13 C NMR (125 MHz, CDCl 3 ) δ 138.5, 134.7, 129.9, 12, 68.7, 59.1, 38.9, 30.0, 23.3, IR (KBr film) (cm -1 ) ν 3474, 3338, 3290, 2971, 2927, 1668, 1448, 1370, 1300, 11, 1062, 7, 968, 936. ESI-MS m/z (%) 193 [M+Na] +. HPLC-ESI-HRMS ([M+Na] + ) calcd for C 10 H 18 O 2 Na , found (2E,6E)-3-Methyl-8-oxonona-2,6-dienal (6a) [3] To a stirred solution of (2E,6E)-3-methylnona-2,6-diene-1,8-diol (195 mg, 1.15 mmol) in DMSO (5 ml), a solution of IBX (2.2 g, 7.75 mmol) in DMSO (5 ml) was added and stirred for 1 h at r.t. Then H 2 O ( ml) was added and the resulting cloudy suspension was filtered through a course fritted funnel and washed with EtOAc ( ml). The aqueous phase was also extracted with EtOAc (5 x 10 ml). The combined organic phases were washed with H 2 O ( ml), dried over MgSO 4 and the solvent was removed under reduced pressure after filtration. The 1 H NMR of the crude product 6a shows a mixture of isomers (2E,6E):(2E,6Z) 87:13. The residue was purified by S-6
7 flash chromatography (SiO 2, pentane/etoac 1:1) to afford 6a (181 mg, 95% yield, dr 94:6) as yellow oil: 1 H NMR (500 MHz, CDCl 3 ) δ 9.99 (d, J = Hz, 1H), 6.74 (dt, J = 1, Hz, 1H), 9 (d, J = 1 Hz, 1H), 5.88 (d, J = Hz, 1H), (m, 2H), (m, 2H), 2.23 (s, 3H), 2.18 (s, 3H). 13 C NMR (125 MHz, CDCl 3 ) δ 19, 19, 161.2, 145.4, 13, 127.7, 38.6, 29.7, 2, IR (KBr film) (cm -1 ) ν 1672, 1629, 1431, 1362, 1255, 1192, 1124, 984. ESI-MS m/z (%) 189 [M+Na] +. GC-EI-HRMS ([M] + ) calcd for C 10 H 14 O ; found (2E,6E)-3-Methyl-8-oxo-8-phenylocta-2,6-dienyl acetate (22) To a stirred solution of (E)-3-methyl-6-oxohex-2-enyl acetate 16 (0 mg, 1.18 mmol) in THF (2 ml), (phenacylidene)triphenylphosphorane 21 (1. g, 4.70 mmol) was added in one portion and stirred for 7 h at C. After filtration of the solid, the solvent was removed under reduced pressure. The residue was extracted with Et 2 O (4 x 10 ml). The combined organic phases were dried over MgSO 4 and the solvent was removed under reduced pressure after filtration. The residue was purified by flash chromatography (SiO 2, toluene/etoac 19:1) to afford the product 22 (296 mg, 93%) as yellow oil: 1 H NMR (0 MHz, CDCl 3 ) δ (m, 2H), (m, 1H), (m, 2H), 1 (dt, J = 15.6, 6.8 Hz, 1H), 6.88 (d, J = 15.6 Hz, 1H), (m, 1H), 4.59 (d, J = 7.2 Hz, 2H), (m, 2H), (m, 2H), 3 (s, 3H), 1.74 (s, 3H). 13 C NMR ( MHz, CDCl 3 ) δ 190.8, 171.1, 148.7, 1.6, 137.8, 132.6, 128.5, 126.2, 119.4, 61.1, 37.8, 30.8, 2, IR (KBr film) (cm -1 ) ν 2936, 1738, 1670, 1651, 1448, 1366, 1233, 1023, 951, 696. ESI-MS m/z (%) 295 () [M+Na] +. HPLC-ESI-HRMS ([M+H] + ) calcd for C 17 H 21 O , found Anal calcd for C 17 H O 3 : C, 7; H, 7.4; found: C, 74.6; H, 7.5. (2E,6E)-8-Hydroxy-3-methyl-8-phenylocta-2,6-dienyl acetate (23) [2] S-7
8 To a stirred solution of (2E,6E)-3-methyl-8-oxo-8-phenylocta-2,6-dienyl acetate 22 (770 mg, 2.83 mmol) and CeCl 3 7H 2 O (1.3 g, 3.58 mmol) in MeOH (18 ml) at 0 C, NaBH 4 was added in three portions (148 mg, 3.91 mmol) and stirred for 2 h at r.t. After the addition of acetone (6 ml) and HCl (0.5 M, 50 ml) the aqueous phase was extracted with EtOAc (4 x ml). The combined organic phases were washed with brine ( ml), dried over MgSO 4 and the solvent was removed under reduced pressure after filtration. The residue was purified by flash chromatography (SiO 2, pentane/et 2 O 2:3) to afford 23 (669 mg, 86%) as yellow oil: 1 H NMR (0 MHz, CDCl 3 ) δ (m, 5H), (m, 2H), (m, 1H), 5.15 (br s, 1H), (m, 2H), (m, 2H), (m, 3H), 5 (s, 3H), 1.68 (s, 3H). 13 C NMR ( MHz, CDCl 3 ) δ 171.2, 143.2, 141.3, 132.9, 131.5, 128.4, 127.5, 126.3, 118.9, 75.1, 61.4, 38.8, 30.1, 21.1, IR (KBr film) (cm -1 ) ν 3434, 3028, 2930, 2863, 2844, 1736, 1451, 1382, 1366, 1233, 1023, 967, 700. ESI- MS m/z (%) 297 () [M+Na] +. HPLC-ESI-HRMS ([M+Na] + ) calcd for C 17 H 22 O 3 Na , found Anal calcd for C 15 H 22 O 3 : C, 74.4; H, 8.1; found: C, 74.5; H, 8.2. (2E,6E)-6-Methyl-1-phenylocta-2,6-diene-1,8-diol (24) [1b] To a stirred solution of (2E,6E)-8-hydroxy-3-methyl-8-phenyl-octa-2,6-dienyl acetic acid ester 23 (2 mg, 0. mmol) in MeOH (3 ml), K 2 CO 3 (8 mg, 0.06 mmol) was added and stirred for 2 h at r.t. Then H 2 O (5 ml) was added and extracted with Et 2 O (4 x ml). The combined organic phases were washed with an aqueous solution of HCl ( M, ml), saturated aqueous solution of NaHCO 3 ( ml), and brine ( ml), dried over MgSO 4 and the solvent was removed under reduced pressure after filtration. The residue was purified by flash chromatography (SiO 2, pentane/et 2 O 1:3) to afford 24 (169 mg, 91%) as yellow oil: 1 H NMR (0 MHz, CDCl 3 ) δ (m, 4H), (m, 1H), (m, 2H), (m, 1H), 5.15 (d, J = Hz, 1H), (m, 2H), (m, 3H), (m, 2H), 1.65 (s, 3H), 1. (br s, 1H). 13 C NMR ( MHz, CDCl 3 ) δ 143.3, 138.7, 132.9, 131.6, 128.4, 127.5, 126.1, 124.1, 75.1, 59.2, 38.7, 30.0, IR (KBr film) (cm -1 ) ν 3330, 3027, 2929, 2850, 1668, 1450, 1382, 1302, 1238, 1090, 4, 965, 756, 700. ESI-MS m/z (%) 255 () [M+Na] +. HPLC-ESI-HRMS ([M+Na] + ) calcd for C 15 H O 2 Na , found Anal calcd for C 15 H O 2 : C, 77.6; H, 8.7; found: C, 77.4; H, 8.6. S-8
9 (2E,6E)-3-Methyl-8-oxo-8-phenylocta-2,6-dienal (6b) [3] To a stirred solution of (2E,6E)-6-methyl-1-phenyl-octa-2,6-dien-1,8-diol 24 (166 mg, 0.71 mmol) in DMSO (1 ml), a solution of IBX (1.2 g, 4.29 mmol) in DMSO (9 ml) was added and stirred for 1 h at r.t. Then H 2 O (10 ml) was added and the resulting cloudy suspension was filtered through a course fritted funnel and washed with Et 2 O ( ml). The aqueous phase was also extracted with Et 2 O (5 x 10 ml). The combined organic phases were washed with H 2 O ( ml), dried over MgSO 4 and the solvent was removed under reduced pressure after filtration. The residue was purified by flash chromatography (SiO 2, pentane/et 2 O 3:2) to afford 6b (114 mg, 70%) as light yellow oil: 1 H NMR (0 MHz, CDCl 3 ) δ (d, J = Hz, 1H), (m, 2H), (m, 1H), (m, 2H), (m, 2H), (m, 1H), (m, 2H), (m, 2H), 2.21 (d, J = 0.8 Hz, 3H). 13 C NMR ( MHz, CDCl 3 ) δ 19, 190.4, 161.6, 14, 137.6, 132.8, 128.6, 128.5, 127.7, 126.7, 38.7, 30.2, IR (KBr film) (cm -1 ) ν 2923, 2853, 1674, 1446, 1382, 1349, 1287, 1252, 1090, 1224, 1175, 1124, 4, 987, 851, 771, 696. ESI-MS m/z (%) 251 () [M+Na] +. HPLC-ESI-HRMS ([M+H] + ) calcd for C 15 H 17 O , found Anal calcd for C 15 H 16 O 2 : C, 78.9; H, 7.1; found: C, 78.4; H, 7.1. [(p-nitrobenzyl)methylene]triphenylphosphoran (25) [4] To a stirred solution of triphenylphosphine (21.2 g,.0 mmol) in acetone (130 ml) a solution of 2- bromo-1-(4-nitrophenyl)ethanone (.6 g,.0 mmol) in acetone (70 ml) was added. The mixture was stirred overnight at r.t. Then the solvent was removed under reduced pressure. The crude salt was solved in H 2 O/EtOH/acetone 1:1:, and then an aqueous solution of NaOH (5%) was added slowly until ph 10 ( ml) at 0 C. The precipitate was separated and dissolved in CHCl 3 (0 ml), and washed with three portions of H 2 O (3 x 50 ml), dried over anhydrous Na 2 SO 4 and the solvent was removed under reduced pressure after filtration. The ylide 25 (1 g, 47% yield, 2 steps) was obtained after recrystallization from ethanol as yellow solid: mp C (lit C). 1 H NMR (0 MHz, CDCl 3 ) δ 8. (d, J = Hz, 2H), 8 (d, J = Hz, 2H), S-9
10 7.68 (m, 6H), (3H), (m, 6H), 4.50 (d, J = 2 Hz, 1H). 31 P NMR (121.5 MHz, CDCl 3 ) δ C NMR (125 MHz, CDCl 3 ) δ (d, J = 3.8 Hz), 148.4, (d, J = 15.3 Hz), (d, J = 10.5 Hz), (d, J = 2.9 Hz), (d, J = 12.5 Hz), 127.9, (d, J = 91.2 Hz), 123.3, 53.7 (d, J = Hz). IR (KBr disk) (cm -1 ) ν 1529, 14, 1436, 18, 1390, 1342, 1183, 1106, 1085, 8, 865, 750, 719, 693. ESI-MS m/z (%) 426 () [M+H] +. HPLC-ESI-HRMS ([M+H] + ) calcd for C 26 H 21 O 3 NP ; found (2E,6E)-3-Methyl-8-(4-nitrophenyl)-8-oxoocta-2,6-dienyl acetate (26) To a stirred solution of (E)-3-methyl-6-oxohex-2-enyl acetate 16 (1 mg, 3.53 mmol) in THF (18 ml), [(p-nitrobenzyl)methylene]triphenylphosphorane 25 (0 g, 14.1 mmol) was added in one portion, under argon atmosphere, and stirred for h at C. The solvent was removed under reduced pressure. The residue was purified by flash chromatography (SiO 2, toluene/etoac :1) to afford 26 (4 mg, 36%) as yellow oil: 1 H NMR (500 MHz, CDCl 3 ) δ 8.31 (d, J = Hz, 2H), 3 (d, J = Hz, 2H), 6 (dt, J = 15.4, 6.9 Hz, 1H), 6.84 (d, J = 15.4 Hz, 1H), 5. (t, J = 6.9 Hz, 1H), 4. (d, J = 6.9 Hz, 2H), 2.50 (q, J = 6.7 Hz, 2H), 2.28 (t, J = 7.5 Hz, 2H), 3 (s, 3H), 1.74 (s, 3H). 13 C NMR ( MHz, CDCl 3 ) δ 189.4, 171.2, 151.2, 150.1, 142.8, 1.4, 129.6, 12, 123.9, 119.8, 61.3, 37.8, 31.1, 21.1, IR (KBr film) (cm -1 ) ν 2937, 1735, 1673, 1621, 1525, 1347, 1233, 1024, 854, 828, 703. ESI-MS m/z (%) 318 (10) [M+H] +, 3 () [M+Na] +, 356 (10) [M+K] +, 381 (30) [M+Na+MeCN] +. HPLC-ESI-HRMS ([M+Na] + ) calcd for C 17 H 19 O 5 NNa ; found (2E,6E)-8-Hydroxy-3-methyl-8-(4-nitrophenyl)octa-2,6-dienyl acetate (27) [2] To a stirred solution of (2E,6E)-3-methyl-8-(4-nitrophenyl)-8-oxoocta-2,6-dienyl acetate 26 (419 mg, 1.30 mmol) and CeCl 3 7H 2 O (630 mg, 1.69 mmol) in MeOH (13 ml) at 0 C, NaBH 4 was added in three portions (69 mg, 1.82 mmol) and stirred for 2 h at r.t. The reaction mixture poured S-10
11 into ice/h 2 O, and then a solution of citric acid (10%) was added. After addition of EtOAc ( ml) the phases were separated, and the aqueous phase was extracted with EtOAc (4 x 15 ml). The combined organic phases were washed with brine ( ml), dried over Na 2 SO 4 and the solvent was removed under reduced pressure after filtration. The residue was purified by flash chromatography (SiO 2, pentane/etoac 4:1 2:1) to afford 27 (397 mg, 96%) as yellow solid: mp -62 C. 1 H NMR (500 MHz, CDCl 3 ) δ 8.18 (dd, J = 8.8, 1.5 Hz, 2H), 7.53 (d, J = 8.1, 2H), (m, 1H), 5.58 (ddd, J = 15.3, 7.2, 1.2 Hz, 1H), 5.31 (t, J = 6.9 Hz, 1H), 5.23 (d, J = 7.3 Hz, 1H), (m, 2H), 2.45 (br s, 1H), (m, 2H), (m, 2H), 4 (d, J = 1.5 Hz, 3H), 1.67 (s, 3H). 13 C NMR (125 MHz, CDCl 3 ) δ 171.2, 150.4, 147.2, 1.7, 133.2, 132.1, 126.8, 123.6, 119.4, 74.3, 61.4, 38.5, 29.9, 2, IR (KBr film) (cm -1 ) ν 3446, 2936, 2853, 1735, 1521, 1348, 1236, 1024, 970, 856, 749, 701, 8. ESI-MS m/z (%) 242 (), 302 () [M-OH] +, 342 () [M+Na] +, 358 (10) [M+K] +, 383 () [M+Na+MeCN] +. HPLC-ESI-HRMS ([M+Na] + ) calcd for C 17 H 21 O 5 NNa ; found (2E,6E)-6-Methyl-1-(4-nitrophenyl)octa-2,6-diene-1,8-diol (28) [1a] AcO NO 2 NO 2 Me Me K 2 CO 3,MeOH HO r.t.,3d 27 OH OH 82% 28 C 17 H 21 NO 5 (319.35) C 15 H 19 NO 4 (277.31) To a stirred solution of (2Z,6E)-8-hydroxy-3-methyl-8-(4-nitrophenyl)octa-2,6-dienyl acetate 27 (372 mg, 1.16 mmol) in MeOH (3 ml), K 2 CO 3 (81 mg, 0.58 mmol) was added at 0 C, under argon atmosphere, and stirred for 3 d at r.t. Then a saturated aqueous solution of NH 4 Cl (10 ml) was added, and after addition of EtOAc (10 ml) the phases were separated. The aqueous phase was extracted with EtOAc (3 x 10 ml). The combined organic phases were washed with brine ( ml), dried over anhydrous Na 2 SO 4 and the solvent was removed under reduced pressure after filtration. The residue was purified by flash chromatography (SiO 2, pentane/etoac 2:1 1:2) to afford 28 (265 mg, 82%) as light yellow solid: mp C. 1 H NMR (500 MHz, CD 3 OD) δ 8.19 (d, J = 8.8 Hz, 2H), 7.58 (d, J = 8.8 Hz, 2H), (m, 1H), 5. (dd, J = 15.3, 6.9 Hz, 1H), 5.36 (td, J = 6.5, 1.2 Hz, 1H), 5. (d, J = 6.9 Hz, 1H), 9-2 (m, 2H), (m, 2H), (m, 2H), 1.64 (s, 3H). 13 C NMR (125 MHz, CD 3 OD) δ 15, 148.4, 138.7, 133.4, 128.2, 125.4, 124.4, 74.9, 59.4,.0, 31.4, IR (KBr film) (cm -1 ) ν 3300, 3167, 29, 1667, 1599, 1519, 1448, 1344, 5, 967, 854, 742, 698. ESI-MS m/z (%) 279 (18), 312 (), 313 (24). HPLC-ESI-HRMS ([2M+Na] + ) calcd for C 30 H 38 O 8 N 2 Na ; found S-11
12 (2E,6E)-3-Methyl-8-(4-nitrophenyl)-8-oxoocta-2,6-dienal (6c) [3] HO Me 28 OH C 15 H 19 NO 4 (277.32) NO NO 2 Me 2 IBX O DMSO,r.t.,45min 6c O 85% C 15 H 15 NO 4 (273.28) To a stirred solution of (2E,6E)-6-methyl-1-(4-nitrophenyl)octa-2,6-diene-1,8-diol 28 (243 mg, 0.88 mmol) in DMSO (5 ml), a solution of IBX (1.5 g, 5.25 mmol) in DMSO (5 ml) was added and stirred for 45 min at r.t. Then H 2 O (15 ml) was added and the resulting cloudy suspension was filtered through a course fritted funnel and washed with EtOAc ( ml). The aqueous phase was also extracted with EtOAc (4 x 10 ml). The combined organic phases were washed with H 2 O ( ml), dried over anhydrous Na 2 SO 4 and the solvent was removed under reduced pressure after filtration. The 1 H NMR of the crude product shows a dr of 90:10. The residue was purified by flash chromatography (SiO 2, pentane/et 2 O 2:1 1:2) to afford 6c (3 mg, 85%, dr 98:2) as yellow solid: mp C. 1 H NMR (500 MHz, CDCl 3 ) δ 1 (d, J = 7.6 Hz, 1H), 8.31 (d, J = 8.8 Hz, 2H), 3 (d, J = 8.8 Hz, 2H), 6 (dt, J = 15.3, 6.9 Hz, 1H), 6.89 (dt J = 15.3, 1.1 Hz, 1H), 5.91 (dd, J =, 1.2 Hz, 1H), (m, 2H), (m, 2H), 2.21 (d, J = 1.1 Hz, 3H). 13 C NMR (125 MHz, CDCl 3 ) δ 19, 18, 161.1, 150.3, 149.4, 142.6, 129.6, 127.9, 126.5, 123.9, 38.6, 30.4, IR (KBr disk) (cm -1 ) ν 29, 2890, 1669, 1619, 1599, 1518, 1344, 12, 1191, 1127, 7, 856, 827, 710. ESI-MS m/z (%) 296 () [M+Na] +. HPLC-ESI-HRMS ([M+H] + ) calcd for C 15 H 16 O 4 N ; found [(p-naphtylbenzyl)methylene]triphenylphosphoran (29) [5] To a stirred solution of 2-bromo-1-(naphthalen-2-yl)ethanone (9.70 g, 38.5 mmol) in CH 2 Cl 2 (27 ml) a solution of triphenylphosphine (10.9 g, 41. mmol) in CH 2 Cl 2 (27 ml) was added at 0 C and stirred overnight at r.t. Then the solvent was removed under reduced pressure. The crude salt was solved in CH 2 Cl 2 /H 2 O 150:150, and then an aqueous solution of Na 2 CO 3 (27.5 g in 1 ml of H 2 O) was added at r.t. and stirred overnight. Then the organic phase was separated, dried over anhydrous Na 2 SO 4 and the solvent was removed under reduced pressure after filtration. After recrystallization from benzene, ylide 29 (12.1 g, 73%, 2 steps) was obtained as light yellow solid: mp C. 1 H NMR (0 MHz, CDCl 3 ) δ 8.57 (s, 1H), 8.15 (dd, J = 8.5, 1.5 Hz, 1H), S-12
13 7.92 (m, 1H), (m, 8H), (m, 11H), 4.64 (d, J = 24.6 Hz, 1H). 31 P NMR (121.5 MHz, CDCl 3 ) δ C NMR (125 MHz, CDCl 3 ) δ (d, J = 2.9 Hz), (d, J = 14.6 Hz), 13, (d, J = 9.7 Hz), 13, (d, J = 2.9 Hz), (d, J = 12.5 Hz), 127.5, 127.4, 127.1, (d, J = 81.6 Hz), 126.2, 12, 51.4 (d, J = Hz). IR (KBr disk) (cm -1 ) ν 15, 1521, 1479, 1433, 13, 1178, 1106, 881, 847, 748, 718, 692, 519. ESI-MS m/z (%) 431 () [M+H] +. HPLC-ESI-HRMS ([M+H] + ) calcd for C 30 H 24 OP ; found (2E,6E)-3-Methyl-8-(naphthalen-2-yl)-8-oxoocta-2,6-dienyl acetate (30) To a suspension of [(p-naphthylbenzyl)methylene]triphenylphosphoran 29 (7. g, 17.6 mmol) in CH 2 Cl 2 ( ml) a solution of (E)-3-methyl-6-oxohex-2-enyl acetate 16 (0 g, 5.88 mmol) in CH 2 Cl 2 (24 ml) was added, under argon atmosphere, and stirred for 4 d at r.t. The solvent was removed under reduced pressure. The 1 H NMR of the crude product shows a dr of 96:4. The residue was purified by flash chromatography (SiO 2, pentane/etoac :1 4:1) to afford 30 (1. g, 73%) as yellow oil: 1 H NMR (500 MHz, CDCl 3 ) δ 8. (br s, 1H), 7.98 (br d, J = 8.8 Hz, 1H), 7.92 (br d, J = Hz, 1H), 7.85 (br d, J = 8.8 Hz, 1H), 7.82 (br d, J = Hz, 1H), (m, 2H), (m, 2H), 5. (t, J = 7.1 Hz, 1H), 4.57 (d, J = 6.8 Hz, 2H), (m, 2H), 2.25 (t, J = 7.4 Hz, 2H), 1.98 (d, J = 1.1 Hz, 3H), 1.72 (s, 3H). 13 C NMR (125 MHz, CDCl 3 ) δ 190.4, 170.9, 148.4, 1.5, 135.4, 135.2, 132.5, 130.0, 129.4, 128.4, 128.3, 127.8, 126.7, 126.3, 124.5, 119.5, 61.1, 37.8, 30.9,.9, IR (KBr film) (cm -1 ) ν 2932, 1736, 1667, 1619, 1364, 1234, 1023, 956, 821, 754. ESI-MS m/z (%) 263 () [M-CH 3 CO 2 ], 323 (78) [M+H] +, 345 (36) [M+Na] +, 386 (10) [M+Na+MeCN] +. DI-EI-HRMS ([M] + ) calcd for C 21 H 22 O ; found (2E,6E)-8-Hydroxy-3-methyl-8-(naphthalen-2-yl)octa-2,6-dienyl acetate (31) [2] To a stirred solution of (2E,6E)-3-methyl-8-(naphthalen-2-yl)-8-oxoocta-2,6-dienyl acetate 30 (0 g, 3.10 mmol) and CeCl 3 7H 2 O (1.50 g, 3 mmol) in MeOH (31 ml) at 0 C, NaBH 4 was added S-13
14 in three portions (164 mg, 4.34 mmol) and stirred for 90 min at r.t. The reaction mixture poured into ice/h 2 O, and then a solution of citric acid (10%) was added. After addition of EtOAc ( ml) the phases were separated, and the aqueous phase was extracted with EtOAc (4 x 30 ml). The combined organic phases were washed with brine (1 ml), dried over anhydrous Na 2 SO 4 and the solvent was removed under reduced pressure after filtration. The residue was purified by flash chromatography (SiO 2, pentane/etoac 4:1 2:1) to afford 31 (858 mg, 85%) as colorless oil: 1 H NMR (0 MHz, CDCl 3 ) δ (m, 4H), (m, 3H), (m, 2H), (m, 2H), (m, 2H), 2.52 (br s, 1H), (m, 2H), (m, 2H), 4 (s, 3H), 1.68 (s, 3H). 13 C NMR ( MHz, CDCl 3 ) δ 171.3, 141.4, 1.7, 133.4, 13, 132.9, 131.7, 128.2, 12, 127.7, 126.2, 125.9, 124.6, 11, 75.2, 61.5, 38.8, 30.2, 21.1, IR (KBr film) (cm -1 ) ν 3423, 2934, 2852, 1736, 1441, 1367, 1236, 1023, 967, 859, 8, 751. ESI-MS m/z (%) 247 (90), 307 (11) [M-OH] +, 347 () [M+Na] +, 388 (10) [M+Na+MeCN] +. DI-EI-HRMS ([M] + ) calcd for C 21 H 24 O ; found (2E,6E)-6-Methyl-1-(naphthalen-2-yl)octa-2,6-diene-1,8-diol (32) [1a] To a stirred solution of (2Z,6E)-8-hydroxy-3-methyl-8-(naphthalen-2-yl)octa-2,6-dienyl acetate 31 (783 mg, 2.41 mmol) in MeOH (6 ml), K 2 CO 3 (334 mg, 2.41 mmol) was added at 0 C, under argon atmosphere, and stirred for h at r.t. Then a saturated aqueous solution of NH 4 Cl ( ml) was added, and after addition of EtOAc ( ml) the phases were separated. The aqueous phase was extracted with EtOAc (3 x ml). The combined organic phases were washed with brine ( ml), dried over anhydrous Na 2 SO 4 and the solvent was removed under reduced pressure after filtration. The residue was purified by flash chromatography (SiO 2, pentane/etoac 2:1 1:1) to afford 32 (670 mg, 98%) as white solid: mp C. 1 H NMR (0 MHz, CDCl 3 ) δ (m, 4H), (m, 3H), (m, 2H), 5.35 (t, J = Hz, 1H), (br m, 1H), (m, 2H), 3.69 (br s, 1H), 2.75 (br s, 1H), (m, 2H), 9-5 (m, 2H), 1. (s, 3H). 13 C NMR ( MHz, CDCl 3 ) δ 1.8, 138.1, 133.1, 132.9, 132.8, 131.6, 128.1, 12, 127.7, 12, 125.7, 124.7, 124.5, 124.2, 7, 5, 38.6, 30.0, IR (KBr disk) (cm -1 ) ν 3303, 3179, 2927, 1449, 1272, 1017, 965, 817, 738, 503, 470. ESI-MS m/z (%) 247 (), 265 () [M-OH] +, 305 (86) [M+Na] +. DI-EI-HRMS ([M] + ) calcd for C 19 H 22 O ; found S-14
15 (2E,6E)-3-Methyl-8-(naphthalen-2-yl)-8-oxoocta-2,6-dienal (6d) [3] To a stirred solution of (2E,6E)-6-methyl-1-(naphthalen-2-yl)octa-2,6-diene-1,8-diol 32 (434 mg, 1.54 mmol) in DMSO (8 ml), a solution of IBX (2.6 g, 9.22 mmol) in DMSO (8 ml) was added and stirred for 1 h 30 min at r.t. Then H 2 O ( ml) was added and the resulting cloudy suspension was filtered through a course fritted funnel and washed with EtOAc (50 ml). The aqueous phase was also extracted with EtOAc (4 x 10 ml). The combined organic phases were washed with H 2 O ( ml), dried over anhydrous Na 2 SO 4 and the solvent was removed under reduced pressure after filtration. The 1 H NMR of the crude product shows a dr of 93:7. The residue was purified by flash chromatography (SiO 2, pentane/et 2 O 1:1) to afford 6d (417 mg, 97%, dr = 94:6) as yellow oil: 1 H NMR (500 MHz, CDCl 3 ) δ 2 (dd, J =, 0.8 Hz, 1H), 8.43 (br s, 1H), (m, 4H), (m, 2H), (m, 2H), 5.96 (dd, J =, 1.1 Hz, 1H), (m, 2H), (m, 2H), 2.21 (s, 3H). 13 C NMR (125 MHz, CDCl 3 ) δ 19, 190.2, 161.9, 146.9, 135.5, 13, 132.5, 130.1, 129.5, 128.7, 128.4, 127.8, 127.7, 126.8, 126.8, 124.4, 38.8, 30.2, IR (KBr film) (cm -1 ) ν 3017, 1668, 1618, 1296, 1216, 1189, 1127, 985, 864, 8, 753, 668. ESI-MS m/z (%) 279 () [M+H] +. HPLC-ESI-HRMS ([M+H] + ) calcd for C 19 H 19 O ; found [(p-chlorobenzyl)methylene]triphenylphosphoran (33) [4b,5] To a stirred solution of 2-bromo-1-(4-chlorophenyl)ethanone (15.3 g, 64.2 mmol) in CHCl 3 (90 ml) triphenylphosphine (1 g, 64.2 mmol) was added at 0 C and stirred overnight at r.t. Then the solvent was removed under reduced pressure. The crude salt was solved in CH 2 Cl 2 /H 2 O :70, and then an aqueous solution of Na 2 CO 3 (45.6 g in 130 ml H 2 O) was added at r.t. and stirred overnight. Then the organic phase was separated, dried over anhydrous Na 2 SO 4 and the solvent was removed under reduced pressure after filtration. After recrystallization from ethanol, ylide 33 (12.1 g, 45% yield) was obtained as yellow solid: mp C (lit C). 1 H NMR (0 MHz, CDCl 3 ) δ 7.90 (d, J = 8.6 Hz, 2H), (m, 6H), (m, 3H), (m, 6H), 7.31 (d, J = 8.6 S-15
16 Hz, 2H), 4.39 (d, J = 24.1 Hz, 1H). 31 P NMR (121.5 MHz, CDCl 3 ) δ C NMR (125 MHz, CDCl 3 ) δ (d, J = 3.9 Hz), (d, J = 15.4 Hz), 135.3, (d, J = 9.6 Hz), (d, J = 2.9 Hz), 12 (d, J = 12.5 Hz), 128.5, 127.9, 12 (d, J = 91.2 Hz), 51.1 (d, J = Hz). IR (KBr disk) (cm -1 ) ν 1576, 1522, 1481, 1434, 1394, 1336, 1174, 1105, 898, 873, 754, 717, 691. ESI- MS m/z (%) 415 () [M+H] +. HPLC-ESI-HRMS ([M+H] + ) calcd for C 26 H 21 OClP ; found (2E,6E)-8-(4-Chlorophenyl)-3-methyl-8-oxoocta-2,6-dienyl acetate (34) To a suspension of [(p-chlorobenzyl)methylene]triphenylphosphorane 33 (7.30 g, 17.6 mmol) in CH 2 Cl 2 ( ml) a solution of (E)-3-methyl-6-oxohex-2-enyl acetate 16 (0 g, 5.88 mmol) in CH 2 Cl 2 (24 ml) was added, under argon atmosphere, and stirred for 4 d at r.t. The solvent was removed under reduced pressure. The 1 H NMR of the crude product shows a conversion of %, and dr of 96:4. The residue was purified by flash chromatography (SiO 2, pentane/etoac :1 6:1) to afford 34 (990 mg, 55%, dr = 94:6) as yellow oil: 1 H NMR (500 MHz, CDCl 3 ) δ 7.83 (dd, J = 8.8, 1.9 Hz, 2H), 7. (dd, J = 8.8, 2.3 Hz, 2H), 6.99 (dtd, J = 15.3, 6.8, Hz, 1H), 6.81 (dd, J = 15.7, 1.5 Hz, 1H), 5.37 (t, J = 7.6 Hz, 1H), 4.56 (d, J = 7.6 Hz, 2H), 2.43 (q, J = 7.3 Hz, 2H), 2.23 (t, J = 7.7 Hz, 2H), 0 (d, J = 2.2 Hz, 3H), 1.71 (s, 3H). 13 C NMR (125 MHz, CDCl 3 ) δ 189.4, 17, 149.2, 1.5, 139.1, 136.3, 130.0, 128.9, 125.9, 119.7, 61.2, 37.8, 30.9, 2, IR (KBr film) (cm -1 ) ν 2936, 17, 1670, 1588, 1367, 1232, 1092, 1015, 956, 824. ESI-MS m/z (%) 247 (), 307 (10) [M+H] +, 329 (66) [M+Na] +, 370 (46) [M+Na+MeCN] +. DI-EI-HRMS ([M] + ) calcd for C 17 H 19 O 3 Cl ; found (2E,6E)-8-(4-Chlorophenyl)-8-hydroxy-3-methylocta-2,6-dienyl acetate (35) [2] AcO Cl Me Me NaBH 4,CeCl 3 7H 2 O AcO MeOH,r.t.,1h 34 O OH 92% 35 C 17 H 19 ClO 3 (306.78) C 17 H 21 ClO 3 (308.) Cl S-16
17 To a stirred solution of (2E,6E)-8-(4-chlorophenyl)-3-methyl-8-oxoocta-2,6-dienyl acetate 34 (8 mg, 2.67 mmol) and CeCl 3 7H 2 O (1.30 g, 3.47 mmol) in MeOH (27 ml) at 0 C, NaBH 4 was added in three portions (141 mg, 3.74 mmol) and stirred for 1 h at r.t. The reaction mixture poured into ice/h 2 O, and then a solution of citric acid (10%) was added. After addition of EtOAc (30 ml) the phases were separated, and the aqueous phase was extracted with EtOAc (4 x ml). The combined organic phases were washed with brine ( ml), dried over anhydrous Na 2 SO 4 and the solvent was removed under reduced pressure after filtration. The residue was purified by flash chromatography (SiO 2, pentane/etoac 4:1) to afford 35 (761 mg, 92%) as colorless oil: 1 H NMR (0 MHz, CDCl 3 ) δ (m, 4H), (m, 1H), (m, 1H), 5.29 (td, J =, Hz, 1H), 7 (br d, J = 6.5 Hz, 1H), (m, 2H), 2.58 (br s, 1H), (m, 2H), (m, 2H), 2 (s, 3H), 1.65 (s, 3H). 13 C NMR ( MHz, CDCl 3 ) δ 171.3, 141.8, 141.2, 13, 132.8, 131.9, 128.5, 127.6, 11, 74.3, 61.5, 38.8, 30.1, 21.1, IR (KBr film) (cm -1 ) ν 3428, 2932, 2854, 1736, 1669, 1489, 1441, 1369, 1233, 1089, 10, 969, 826. ESI-MS m/z (%) 331 () [M+Na] +. DI-EI-HRMS ([M] + ) calcd for C 17 H 21 O 3 Cl ; found (2E,6E)-1-(4-Chlorophenyl)-6-methylocta-2,6-diene-1,8-diol (36) [1a] To a stirred solution of (2E,6E)-8-(4-chlorophenyl)-8-hydroxy-3-methylocta-2,6-dienyl acetate 35 (636 mg, 6 mmol) in MeOH (5 ml), K 2 CO 3 (144 mg, 3 mmol) was added at 0 C, under argon atmosphere, and stirred for 42 h at r.t. Then a saturated aqueous solution of NH 4 Cl ( ml) was added and extracted with EtOAc (4 x ml). The combined organic phases were washed with brine ( ml), dried over anhydrous Na 2 SO 4 and the solvent was removed under reduced pressure after filtration. The residue was purified by flash chromatography (SiO 2, pentane/etoac 2:1 1:1) to afford 36 (538 mg, 98%) as white solid: mp -62 C. 1 H NMR (0 MHz, CDCl 3 ) δ (m, 4H), (m, 1H), 5.54 (dd, J = 15.3, Hz, 1H), 5.32 (t, J = Hz, 1H), 7 (d, J = Hz, 1H), (m, 2H), 2.92 (br s, 1H), (m, 5H), 1. (s, 3H). 13 C NMR (125 MHz, CDCl 3 ) δ 141.9, 138.5, 133.2, 132.9, 132.1, 128.6, 127.6, 124.3, 74.5, 59.3, 38.8, 30.1, IR (KBr film) (cm -1 ) ν 33, 2926, 1667, 1488, 1437, 18, 1089, 1010, 825. ESI-MS m/z (%) 231 (75) [M+Cl] +, 249 () [M+OH] +, 289 () [M+Na] +. HPLC-ESI-HRMS ([M+H] + ) calcd for C 15 H O 2 Cl ; found S-17
18 (2E,6E)-8-(4-Chlorophenyl)-3-methyl-8-oxoocta-2,6-dienal (6e) [3] To a stirred solution of (2E,6E)-1-(4-chlorophenyl)-6-methylocta-2,6-diene-1,8-diol 36 (4 mg, 1.72 mmol) in DMSO (9 ml), a solution of IBX (2.9 g, mmol) in DMSO (9 ml) was added and stirred for min at r.t. Then H 2 O ( ml) was added and the resulting cloudy suspension was filtered through a course fritted funnel and washed with EtOAc (50 ml). The aqueous phase was also extracted with EtOAc (4 x 10 ml). The combined organic phases were washed with H 2 O ( ml), dried over anhydrous Na 2 SO 4 and the solvent was removed under reduced pressure after filtration. The 1 H NMR of the crude product shows a dr of 90:10. The residue was purified by flash chromatography (SiO 2, pentane/et 2 O/ 1:2) to afford 6e (430 mg, 95% yield, dr = 96:4) as light yellow oil: 1 H NMR (500 MHz, CDCl 3 ) δ 0 (dd, J = 7.7, 1.9 Hz, 1H), 7.85 (dd, J = 8.8, 1.9 Hz, 2H), 7.44 (dd, J = 8.8, 1.9 Hz, 2H), (m, 1H), 6.89 (dd, J = 15.3, 1.2 Hz, 1H), 5.92 (d, J = 8.1 Hz, 1H), (m, 2H), (m, 2H), 2.21 (s, 3H). 13 C NMR (125 MHz, CDCl 3 ) δ 19, 189.1, 161.6, 147.6, 139.3, 13, 130.0, 12, 127.7, 126.4, 38.7, 30.2, IR (KBr film) (cm -1 ) ν 2938, 1671, 1619, 1588, 1294, 1222, 1092, 1010, 843, 732. ESI-MS m/z (%) 245 (), 263 () [M+H] +. HPLC-ESI-HRMS ([M+H] + ) calcd for C 15 H 16 O 2 Cl ; found [(p-methoxybenzyl)methylene]triphenylphosphoran (37) [6] To a stirred solution of 2-bromo-1-(4-methoxyphenyl)ethanone (4. g,.0 mmol) in THF ( ml) triphenylphosphine (5.30 g,.0 mmol) was added at 0 C and stirred for 3 h, and then overnight at r.t. The suspension was concentrated under reduced pressure to half of its volume and was Et 2 O (10 ml) was added. The phosphonium salt was filtered off and washed with Et 2 O ( ml). An aqueous solution of Na 2 CO 3 ( M, 170 ml) was added and stirred overnight at r.t. The reaction mixture was extracted with EtOAc (2 x ml) and the combined organic phases were dried over MgSO 4, filtered and concentrated under reduced pressure. The ylide 37 (5.5 g, 82%) was S-18
19 obtained as white solid. The spectroscopical data of were identical to those described in the literature. (2E,6E)-8(4-Methoxyphenyl)-3-methyl-8-oxo-8-oxoocta-2,6-dienyl acetate (38) Ph 3 P O OMe Me 37 Me AcO O THF,70 C,8h AcO 16 84% 38 O C 9 H 14 O 3 (170.21) C 18 H 22 O 4 (302.36) OMe To a stirred solution of (E)-3-methyl-6-oxohex-2-enyl acetate 16 (700 mg, 4.11 mmol) in THF (5 ml) [(p-methoxybenzyl)methylene]triphenylphosphorane 37 (3.4 g, 8.23 mmol) was added in one portion and stirred for 8 h at 70 C. The yellow solid was filtered off, washed with Et 2 O ( ml) and the solvent was removed under reduced pressure. The residue was purified by flash chromatography (SiO 2, hexane/acetone 4:1) to afford 38 (1.1 g, 84%) as yellow oil: 1 H NMR (0 MHz, CDCl 3 ) δ 7.94 (d, J = Hz, 2H), (m, 4H), (m, 1H), 4. (d, J = 7.1 Hz, 2H), 3.88 (s, 3H), (m, 2H), (m, 2H), 4 (s, 3H), 1.75 (s, 3H). 13 C NMR ( MHz, CDCl 3 ) δ 18, 171.1, 163.3, 147.6, 1.7, 130.8, 130.7, 125.9, 119.3, 113.7, 61.2, 55.4, 37.9, 30.8, 2, IR (KBr disk) (cm -1 ) ν 1736, 1669, 1622, 10, 1512, 1371, 1344, 1304, 1259, 1171, ESI-MS m/z (%) 303 (64) [M+H] +, 325 (64) [M+Na] +, 366 () [M+Na+MeCN] +. HPLC-ESI-HRMS ([M+H] + ) calcd for C 18 H 23 O , found Anal calcd for C 18 H 22 O 4 : C, 71.5; H, 7.3; found: C, 71.2; H, 7.4. (2E,6E)-8-Hydroxy-8-(4-methoxyphenyl)-3-methylocta-2,6-dienyl acetate (39) [2] To a stirred solution of (2E,6E)-8-(4-methoxyphenyl)-3-methyl-8-oxoocta-2,6-dienyl acetate 38 (9 mg, 3.24 mmol) and CeCl 3 7H 2 O (1.5 g, 4.10 mmol) in MeOH ( ml) at 0 C, NaBH 4 was added in three portions (184 mg, 4.86 mmol) and stirred for 2 h at r.t. After the addition of acetone (6 ml) and HCl (0.5 M, 50 ml) the aqueous phase was extracted with EtOAc (4 x ml). The combined organic phases were washed with brine ( ml), dried over MgSO 4 and the solvent was S-19
20 removed under reduced pressure after filtration. The residue was purified by flash chromatography (SiO 2, hexane/acetone 4:1) to afford the product 39 (711 mg, 72%) as yellow oil: 1 H NMR (0 MHz, CDCl 3 ) δ 7.30 (d, J = 8.5 Hz, 2H), 6.89 (d, J = 8.5 Hz, 2H), (m, 2H), (m, 1H), 5.12 (br s, 1H), (m, 2H), 3.81 (s, 3H), (m, 2H), (m, 2H), 6 (s, 3H), 0 (br d, J = 3.6 Hz, 1H), 1.68 (s, 3H). 13 C NMR ( MHz, CDCl 3 ) δ 171.2, 15, 141.4, 135.4, 13, 13, 127.4, 118.9, 113.8, 74.6, 61.4, 55.3, 38.8, 30.1, 21.1, IR (KBr film) (cm - 1 ) ν 3465, 2934, 2837, 1737, 1669, 1610, 1585, 1512, 1443, 1382, 1367, 1247, 1174, 1087, 1033, 970, 832. ESI-MS m/z (%) 327 () [M+Na] +. HPLC-ESI-HRMS ([M+Na] + ) calcd for C 18 H 24 O 4 Na , found Anal calcd for C 18 H 24 O 4 : C, 7; H, ; found: C, 71.5; H,. (2E,6E)-1-(4-Methoxyphenyl)-6-methylocta-2,6-dien-1,8-diol () [1b] To a stirred solution of (2E,6E)-8-hydroxy-8-(4-methoxyphenyl)-3-methylocta-2,6-dienyl acetate 39 (6 mg, 2.10 mmol) in MeOH (15 ml), K 2 CO 3 (8 mg, 0.06 mmol) was added and stirred for 4 h at r.t. Then H 2 O (5 ml) was added and extracted with EtOAc (4 x 15 ml). The combined organic phases were washed with HCl ( M, 15 ml), saturated aqueous solution of NaHCO 3 ( ml), and brine ( ml), dried over MgSO 4 and the solvent was removed under reduced pressure after filtration. The residue was purified by flash chromatography (SiO 2, hexane/acetone 7:3) to afford the product (4 mg, %) as yellow oil: 1 H NMR (0 MHz, CDCl 3 ) δ 7.28 (d, J = 8.5 Hz, 2H), 6.89 (d, J = 8.5 Hz, 2H), (m, 2H), (m, 1H), 5.15 (br d, J = 5.1 Hz, 1H), (m, 2H), 3.81 (s, 3H), (m, 4H), 1.66 (s, 3H), 1.44 (br s, 1H). 13 C NMR ( MHz, CDCl 3 ) δ , 135.5, 13, 131.2, 127.4, 124.1, 113.8, 74.7, 59.2, 55.3, 38.8, 30.1, IR (KBr film) (cm -1 ) ν 3353, 2932, 2837, 1667, 1610, 1585, 1511, 1442, 1382, 1302, 1247, 1174, 1086, 1034, 972, 832, 731. ESI-MS m/z (%) 245 (), 285 (62) [M+Na] +. HPLC-ESI- HRMS ([M+Na] + ) calcd for C 16 H 22 O 3 Na , found Anal calcd for C 16 H 22 O 3 : C, 73.3; H, 8.5; found: C, 73.2; H, 8.4. S-
21 (2E,6E)-8-(4-Methoxyphenyl)-3-methyl-8-oxoocta-2,6-dienal (6f) [3] To a stirred solution of (2E,6E)-1-(4-methoxyphenyl)-6-methylocta-2,6-diene-1,8-diol (0 mg, 1.53 mmol) in DMSO (1 ml), a solution of IBX (2. g, 9.15 mmol) in DMSO (10 ml) was added and stirred for 1 h at r.t. Then H 2 O (15 ml) was added and the resulting cloudy suspension was filtered through a course fritted funnel and washed with Et 2 O (1 ml). The aqueous phase was extracted with EtOAc (5 x 10 ml) and the combined organic phases were washed with brine (1 ml), dried over MgSO 4 and the solvent was removed under reduced pressure after filtration. The residue was purified by flash chromatography (SiO 2, pentane/et 2 O 1:1) to afford the product 6f (268 mg, 68%, dr 98:2) as yellow oil: 1 H NMR (0 MHz, CDCl 3 ) δ (d, J = Hz, 1H), 7.93 (d, J = 8.5 Hz, 2H), (m, 4H), (m, 1H), 3.87 (s, 3H), (m, 2H), (m, 2H), 2. (d, J = 0.8 Hz, 3H). 13 C NMR ( MHz, CDCl 3 ) δ 191.2, 188.8, 163.6, 16, 14, 13, 130.7, 127.8, 126.6, 113.9, 55.6, 38.9, 30.3, IR (KBr film) (cm -1 ) ν 3006, 2936, 2843, 2772, 1666, 1596, 1510, 14, 1305, 1256, 1169, 11, 1090, 1025, 847, 676, 634, 6. ESI- MS m/z (%) 259 () [M+H] +. HPLC-ESI-HRMS ([M+H] + ) calcd for C 16 H 19 O , found Anal calcd for C 16 H 18 O 3 : C, 74.4; H, ; found: C, 74.1; H, 7.2. (E)-6-Hydroxy-3-methyl-7-nitrohept-2-enyl acetate (41) [7] KO t Bu (126 mg, 1.12 mmol) was added to a stirred solution of (E)-3-methyl-6-oxohex-2-enyl acetate 16 (1.90 g, 11.2 mmol), nitromethane (910 µl, 16.9 mmol), THF (2.8 ml) and tert-butanol (2.8 ml) at 0 C. The stirred mixture was allowed to warm to r.t. After 45 h the mixture was poured into water ( ml) and extracted with EtOAc (4 x ml). The combined organic layers were washed with water ( ml) and brine (50 ml), dried over anhydrous Na 2 SO 4, filtered and the solvent was removed under reduced pressure. The residue was purified by flash chromatography (SiO 2, pentane/etoac 9:1 3:1) to afford the product 41 ( g, 79% yield) as yellow oil: 1 H NMR (500 MHz, CDCl 3 ) δ (m, 1H), 4.56 (d, J = 6.5 Hz, 2H), (m, 2H), 4.28 (br s, 1H), (m, 1H), (m, 1H), (m, 1H), 3 (d, J = 2.3 Hz, 3H), 1.70 (s, S-21
22 3H), (m, 2H). 13 C NMR (125 MHz, CDCl 3 ) δ 171.4, 1.8, 119.7,.7, 68.2, 61.3, 35.1, 31.6, 21.1, IR (KBr film) (cm -1 ) ν 3854, 3484, 2924, 1711, 1552, 1432, 13, 1232, 1093, ESI-MS m/z (%) 254 () [M+Na] +. HPLC-ESI-HRMS ([M+Na] + ) calcd for C 10 H 17 O 5 NNa , found 251. (2E,6E)-3-Methyl-7-nitrohepta-2,6-dienyl acetate (42) [7] Trifluoroacetic anhydride (0.77 ml, 5.54 mmol) was added to a solution of β-nitro alcohol 41 (1. g, 4 mmol) in CH 2 Cl 2 (5.6 ml) at -10 C. The resulting solution was allowed to stir 5 min, and then triethylamine (1.4 ml, 10.1 mmol) was slowly added dropwise over 15 min and the reaction mixture stirred 16 min at 10 C. The resulting mixture was poured into CH 2 Cl 2 (50 ml) and washed with saturated aqueous NH 4 Cl solution (2 x 30 ml). The aqueous layers were backextracted with CH 2 Cl 2 (2 x 30 ml) and the combined organic layers were washed with brine ( ml), dried over anhydrous Na 2 SO 4 and the solvent was removed under reduced pressure after filtration. The residue was purified by flash chromatography (SiO 2, pentane/etoac 9:1 3:1) to afford the product 42 (830 mg, 77%) as yellow oil: 1 H NMR (500 MHz, CDCl 3 ) δ (m, 1H), 6.97 (dt, J = 13.4, 1.5 Hz, 1H), 5.38 (td, J = 6.9, 1.1 Hz, 1H), 4.58 (d, J = 6.9 Hz, 2H), (m, 2H), 2.25 (br t, J = 7.4 Hz, 2H), 4 (s, 3H), 1.72 (s, 3H). 13 C NMR (125 MHz, CDCl 3 ) δ 171.1, 141.6,, 139.4, 1.5, 61.1, 37.4, 26.6, 21.1, IR (KBr film) (cm -1 ) ν 2928, 1735, 1649, 1525, 1448, 1353, 1235, 1024, 955. HPLC-ESI-HRMS ([2M+Na] + ) calcd for C H 30 O 8 N 2 Na , found (2E,6E)-3-Methyl-7-nitrohepta-2,6-dienal (6g) [9] To a stirred solution of (2E,6E)-3-methyl-7-nitrohepta-2,6-dienyl acetate 42 (1. g, 5.77 mmol) in dry CH 2 Cl 2 (250 ml), DIBAL-H (5.7 ml, 5.71 mmol, M in heptane) was added under argon atmosphere at -78 C, and stirred for 1 h. After dropwise addition of a saturated aqueous solution of NH 4 Cl and potassium sodium tartrate a white emulsion was formed. The phases were separated after 1 h of stirred. The aqueous phase was extracted with EtOAc (3 x ml). The combined S-22
23 organic phases were washed with brine (150 ml), dried over anhydrous Na 2 SO 4 and the solvent was removed under reduced pressure after filtration. The residue was purified by flash chromatography (SiO 2, pentane/etoac 1:1) to afford the product 43 and the corresponding reduced product (E)-3-methyl-7-nitrohept-2-en-1-ol (723 mg, dr = :) as yellow oil. To a stirred solution of this mixture in DMSO (18 ml), a solution of IBX (3.50 g, 12.7 mmol) in DMSO (9 ml) was added and stirred for 1 h at r.t. Then H 2 O (5 ml) was added and the resulting suspension was filtered through a course fritted funnel and washed with EtOAc ( ml). The aqueous phase was extracted with EtOAc (3 x 10 ml) and the combined organic phases were washed with brine (50 ml), dried over anhydrous Na 2 SO 4 and the solvent was removed under reduced pressure after filtration. The residue was purified by flash chromatography (SiO 2, pentane/etoac 2:1) to afford the product 6g (297 mg, dr = 72:28) and the corresponding reduced product (E)-3-methyl-7- nitrohept-2-enal as yellow oil. After second column chromatography the product 6g was obtained pure enough for the catalytic reaction: 1 H NMR (500 MHz, CDCl 3 ) δ 0 (d, J = 7.7 Hz, 1H), (m, 1H), 1 (d, J = 13.4, 1H), 5.88 (d, J = 7.6 Hz, 1H), (m, 2H), (m, 2H), 2. (s, 3H). 13 C NMR ( MHz, CDCl 3 ) δ 190.9,, 1.4, 1.3, 12, 38.1, 25.9, IR (KBr film) (cm -1 ) ν 3703, 3498, 2964, 1670, 1522, 1437, 1352, GC-CI-MS m/z (%) 81 (), 95 (70), 123 (55), 138 (55), 170 (30) [M+H] +. HPLC-CI-HRMS ([M+H] + ) calcd for C 8 H 12 O 3 N , found (2E,6E)-Methyl-8-acetoxy-6-methylocta-2,6-dienoate (45) [8] To a stirred solution of (E)-3-methyl-6-oxohex-2-enyl acetate 16 (4.30 g, 25.1 mmol) in CH 2 Cl 2 (155 ml), methyl (triphenylphosphoranylidene)acetate 44 (10.6 g, 31.6 mmol) was added in one portion and stirred for 18 h at r.t. The solvent was removed under reduced pressure. The residue was purified by flash chromatography (SiO2, pentane/et 2 O 4:1) to afford the product 45 [8b] (5.4 g, 95%, dr = 95:5) as yellow oil: 1 H NMR (0 MHz, CDCl 3 ) δ 6.92 (dt, J = 15.6, 7.2 Hz, 1H), 5.81 (dt, J = 15.6, 1.2 Hz, 1H), (m, 1H), 4.57 (d, J = 6.8 Hz, 2H), 3.71 (s, 3H), (m, 2H), (m, 2H), 4 (s, 3H), 1.69 (s, 3H). 13 C NMR ( MHz, CDCl 3 ) δ 17, 166.9, 148.4, 1.5, 121.2, 119.3, 61.1, 51.4, 37.6, 30.2, 2, S-23
Direct Transformation of Ethylarenes into Primary Aromatic Amides with N-Bromosuccinimide and I 2 -aq NH 3
Supporting Information Direct Transformation of Ethylarenes into Primary Aromatic Amides with N-Bromosuccinimide and I 2 -aq NH 3 Shohei Shimokawa, Yuhsuke Kawagoe, Katsuhiko Moriyama, Hideo Togo* Graduate
Διαβάστε περισσότεραA facile and general route to 3-((trifluoromethyl)thio)benzofurans and 3-((trifluoromethyl)thio)benzothiophenes
Electronic Supplementary Material (ESI) for ChemComm. This journal is The Royal Society of Chemistry 2014 A facile and general route to 3-((trifluoromethyl)thio)benzofurans and 3-((trifluoromethyl)thio)benzothiophenes
Διαβάστε περισσότεραCopper-catalyzed formal O-H insertion reaction of α-diazo-1,3-dicarb- onyl compounds to carboxylic acids with the assistance of isocyanide
Electronic Supplementary Material (ESI) for ChemComm. This journal is The Royal Society of Chemistry 2014 Copper-catalyzed formal O-H insertion reaction of α-diazo-1,3-dicarb- onyl compounds to carboxylic
Διαβάστε περισσότεραSupporting Information
Supporting Information Copper/Silver Cocatalyzed Oxidative Coupling of Vinylarenes with ICH 2 CF 3 or ICH 2 CHF 2 Leading to β-cf 3 /CHF 2 -Substituted Ketones Niannian Yi, Hao Zhang, Chonghui Xu, Wei
Διαβάστε περισσότεραSupporting Information
Supporting Information Lewis acid catalyzed ring-opening reactions of methylenecyclopropanes with diphenylphosphine oxide in the presence of sulfur or selenium Min Shi,* Min Jiang and Le-Ping Liu State
Διαβάστε περισσότεραSupporting Information
Supporting Information Montmorillonite KSF-Catalyzed One-pot, Three-component, Aza-Diels- Alder Reactions of Methylenecyclopropanes With Arylaldehydes and Aromatic Amines Li-Xiong Shao and Min Shi* General
Διαβάστε περισσότεραSupporting Information
Supporting Information for AgOTf-catalyzed one-pot reactions of 2-alkynylbenzaldoximes with α,β-unsaturated carbonyl compounds Qiuping Ding 1, Dan Wang 1, Puying Luo* 2, Meiling Liu 1, Shouzhi Pu* 3 and
Διαβάστε περισσότεραThe Free Internet Journal for Organic Chemistry
The Free Internet Journal for Organic Chemistry Paper Archive for Organic Chemistry Arkivoc 2018, part iii, S1-S6 Synthesis of dihydropyranones and dihydropyrano[2,3- d][1,3]dioxine-diones by cyclization
Διαβάστε περισσότεραSupporting Information
Supporting Information for Lewis acid-catalyzed redox-neutral amination of 2-(3-pyrroline-1-yl)benzaldehydes via intramolecular [1,5]-hydride shift/isomerization reaction Chun-Huan Jiang, Xiantao Lei,
Διαβάστε περισσότεραSite-Selective Suzuki-Miyaura Cross-Coupling Reactions of 2,3,4,5-Tetrabromofuran
1 Site-Selective Suzuki-Miyaura Cross-Coupling Reactions of 2,3,4,5-Tetrabromofuran Munawar Hussain, a Rasheed Ahmad Khera, a Nguyen Thai Hung, a Peter Langer* a,b a Institut für Chemie, Universität Rostock,
Διαβάστε περισσότεραHighly enantioselective cascade synthesis of spiropyrazolones. Supporting Information. NMR spectra and HPLC traces
Highly enantioselective cascade synthesis of spiropyrazolones Alex Zea a, Andrea-Nekane R. Alba a, Andrea Mazzanti b, Albert Moyano a and Ramon Rios a,c * Supporting Information NMR spectra and HPLC traces
Διαβάστε περισσότεραRoom Temperature Highly Diastereoselective Zn-Mediated. Allylation of Chiral N-tert-Butanesulfinyl Imines: Remarkable Reaction Condition Controlled
Supporting Information for: Room Temperature Highly Diastereoselective Zn-Mediated Allylation of Chiral N-tert-Butanesulfinyl Imines: Remarkable Reaction Condition Controlled Stereoselectivity Reversal
Διαβάστε περισσότεραElectronic Supplementary Information
Electronic Supplementary Information Unprecedented Carbon-Carbon Bond Cleavage in Nucleophilic Aziridine Ring Opening Reaction, Efficient Ring Transformation of Aziridines to Imidazolidin-4-ones Jin-Yuan
Διαβάστε περισσότεραCopper-Catalyzed Oxidative Dehydrogenative N-N Bond. Formation for the Synthesis of N,N -Diarylindazol-3-ones
Electronic Supplementary Material (ESI) for Organic Chemistry Frontiers. This journal is the Partner Organisations 2016 Supporting information Copper-Catalyzed Oxidative Dehydrogenative - Bond Formation
Διαβάστε περισσότεραSupporting information
Electronic upplementary Material (EI) for New Journal of Chemistry. This journal is The Royal ociety of Chemistry and the Centre National de la Recherche cientifique 7 upporting information Lipase catalyzed,-addition
Διαβάστε περισσότεραSupporting Information. Asymmetric Binary-acid Catalysis with Chiral. Phosphoric Acid and MgF 2 : Catalytic
Supporting Information Asymmetric Binary-acid Catalysis with Chiral Phosphoric Acid and MgF 2 : Catalytic Enantioselective Friedel-Crafts Reactions of β,γ- Unsaturated-α-Ketoesters Jian Lv, Xin Li, Long
Διαβάστε περισσότεραVilsmeier Haack reagent-promoted formyloxylation of α-chloro-narylacetamides
Electronic Supplementary Material (ESI) for RSC Advances. This journal is The Royal Society of Chemistry 205 Vilsmeier aack reagent-promoted formyloxylation of α-chloro-arylacetamides by formamide Jiann-Jyh
Διαβάστε περισσότεραSupporting Information
Supporting Information Ceric Ammonium Nitrate (CAN) catalyzed efficient one-pot three component aza-diels-alder reactions for a facile synthesis of tetrahydropyranoquinoline derivatives Ravinder Goud Puligoundla
Διαβάστε περισσότεραDirect Palladium-Catalyzed Arylations of Aryl Bromides. with 2/9-Substituted Pyrimido[5,4-b]indolizines
Direct Palladium-Catalyzed Arylations of Aryl Bromides with 2/9-Substituted Pyrimido[5,4-b]indolizines Min Jiang, Ting Li, Linghua Meng, Chunhao Yang,* Yuyuan Xie*, and Jian Ding State Key Laboratory of
Διαβάστε περισσότεραEnantioselective Organocatalytic Michael Addition of Isorhodanines. to α, β-unsaturated Aldehydes
Electronic Supplementary Material (ESI) for Organic & Biomolecular Chemistry. This journal is The Royal Society of Chemistry 2016 Enantioselective Organocatalytic Michael Addition of Isorhodanines to α,
Διαβάστε περισσότεραAminofluorination of Fluorinated Alkenes
Electronic Supplementary Material (ESI) for ChemComm. This journal is The Royal Society of Chemistry 2018 Synthesis of ɑ CF 3 and ɑ CF 2 H Amines via Aminofluorination of Fluorinated Alkenes Ling Yang,
Διαβάστε περισσότεραFacile construction of the functionalized 4H-chromene via tandem. benzylation and cyclization. Jinmin Fan and Zhiyong Wang*
Facile construction of the functionalized 4H-chromene via tandem benzylation and cyclization Jinmin Fan and Zhiyong Wang* Hefei National Laboratory for Physical Science at Microscale, Joint- Lab of Green
Διαβάστε περισσότεραSupplementary Figure S1. Single X-ray structure 3a at probability ellipsoids of 20%.
Supplementary Figure S1. Single X-ray structure 3a at probability ellipsoids of 20%. S1 Supplementary Figure S2. Single X-ray structure 5a at probability ellipsoids of 20%. S2 H 15 Ph Ac Ac I AcH Ph Ac
Διαβάστε περισσότερα9-amino-(9-deoxy)cinchona alkaloids-derived novel chiral phase-transfer catalysts
Electronic Supplementary Material (ESI) for Organic & Biomolecular Chemistry. This journal is The Royal Society of Chemistry 2014 9-amino-(9-deoxy)cinchona alkaloids-derived novel chiral phase-transfer
Διαβάστε περισσότεραSupporting Information. Table of Contents. II. Experimental procedures. II. Copies of 1H and 13C NMR spectra for all compounds
Electronic upplementary Material (EI) for rganic & Biomolecular Chemistry. This journal is The Royal ociety of Chemistry 2017 Laboratoire de Méthodologie et ynthèse de Produit aturels. Université du Québec
Διαβάστε περισσότεραand Selective Allylic Reduction of Allylic Alcohols and Their Derivatives with Benzyl Alcohol
FeCl 3 6H 2 O-Catalyzed Disproportionation of Allylic Alcohols and Selective Allylic Reduction of Allylic Alcohols and Their Derivatives with Benzyl Alcohol Jialiang Wang, Wen Huang, Zhengxing Zhang, Xu
Διαβάστε περισσότεραSupporting Information. Copyright Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, 2006
Supporting Information Copyright Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, 2006 1 A Facile Way to Synthesize 2H-Chromenes: Reconsideration of the Reaction Mechanism between Salicylic Aldehyde and
Διαβάστε περισσότεραSupporting Information One-Pot Approach to Chiral Chromenes via Enantioselective Organocatalytic Domino Oxa-Michael-Aldol Reaction
Supporting Information ne-pot Approach to Chiral Chromenes via Enantioselective rganocatalytic Domino xa-michael-aldol Reaction Hao Li, Jian Wang, Timiyin E-Nunu, Liansuo Zu, Wei Jiang, Shaohua Wei, *
Διαβάστε περισσότεραSupporting Information. Synthesis and biological evaluation of 2,3-Bis(het)aryl-4-azaindoles Derivatives as protein kinases inhibitors
Supporting Information Synthesis and biological evaluation of 2,3-Bis(het)aryl-4-azaindoles Derivatives as protein kinases inhibitors Frédéric Pin, a Frédéric Buron, a Fabienne Saab, a Lionel Colliandre,
Διαβάστε περισσότεραSupporting Information for
Supporting Information for An atom-economic route to densely functionalized thiophenes via base-catalyzed rearrangement of 5-propargyl-2H-thiopyran-4(3H)-ones Chunlin Tang a, Jian Qin b, Xingqi Li *a a
Διαβάστε περισσότεραSupporting Information
Electronic Supplementary Material (ESI) for ChemComm. This journal is The Royal Society of Chemistry 2015 Synthesis of 3-omosubstituted Pyrroles via Palladium- Catalyzed Intermolecular Oxidative Cyclization
Διαβάστε περισσότεραSupporting Information. Synthesis and biological evaluation of nojirimycin- and
Supporting Information for Synthesis and biological evaluation of nojirimycin- and pyrrolidine-based trehalase inhibitors Davide Bini 1, Francesca Cardona 2, Matilde Forcella 1, Camilla Parmeggiani 2,3,
Διαβάστε περισσότεραSupporting Information
Supporting Information An Approach to 3,6-Disubstituted 2,5-Dioxybenzoquinones via Two Sequential Suzuki Couplings. Three-step Synthesis of Leucomelone Xianwen Gan, Wei Jiang, Wei Wang,,,* Lihong Hu,,*
Διαβάστε περισσότεραSupporting Information
Supporting Information Wiley-VC 007 9 Weinheim, Germany ew ear Infrared Dyes and Fluorophores Based on Diketopyrrolopyrroles Dipl.-Chem. Georg M. Fischer, Dipl.-Chem. Andreas P. Ehlers, Prof. Dr. Andreas
Διαβάστε περισσότεραSupporting Information
Supporting Information Wiley-VCH 2007 69451 Weinheim, Germany Supporting Information for Catalytic Enantioselective Conjugate Reduction of β,β- Disubstituted α,β-unsaturated sulfones Tomás Llamas, Ramón
Διαβάστε περισσότεραSupplementary information
Electronic Supplementary Material (ESI) for MedChemComm. This journal is The Royal Society of Chemistry 2015 Supplementary information Synthesis of carboxyimidamide-substituted benzo[c][1,2,5]oxadiazoles
Διαβάστε περισσότεραDivergent synthesis of various iminocyclitols from D-ribose
Electronic Supplementary Material (ESI) for rganic & Biomolecular Chemistry. This journal is The Royal Society of Chemistry 205 Divergent synthesis of various iminocyclitols from D-ribose Ramu Petakamsetty,
Διαβάστε περισσότεραSupporting Information
Supporting Information Enantiospecific Synthesis of the Cubitane Skeleton Elisabeth Schöttner, M. Wiechoczek, Peter G. Jones, and Thomas Lindel * TU Braunschweig, Institutes of rganic, Inorganic and Analytical
Διαβάστε περισσότεραFirst DMAP-mediated direct conversion of Morita Baylis. Hillman alcohols into γ-ketoallylphosphonates: Synthesis of
Supporting Information File 1 for First DMAP-mediated direct conversion of Morita Baylis Hillman alcohols into γ-ketoallylphosphonates: Synthesis of γ-aminoallylphosphonates Marwa Ayadi 1,2, Haitham Elleuch
Διαβάστε περισσότεραSupporting Information. Experimental section
Electronic Supplementary Material (ESI) for RSC Advances. This journal is The Royal Society of Chemistry 2014 Supporting Information Experimental section General. Proton nuclear magnetic resonance ( 1
Διαβάστε περισσότεραSupplementary Information for
Supplementary Information for Organocatalytic Asymmetric Intramolecular [3+2] Cycloaddition: A Straightforward Approach to Access Multiply Substituted Hexahydrochromeno[4,3-b]pyrrolidine Derivatives in
Διαβάστε περισσότεραMandelamide-Zinc Catalyzed Alkyne Addition to Heteroaromatic Aldehydes
1 Mandelamide-Zinc Catalyzed Alkyne Addition to Heteroaromatic Aldehydes Gonzalo Blay, Isabel Fernández, Alícia Marco-Aleixandre, and José R. Pedro Departament de Química Orgànica, Facultat de Química,
Διαβάστε περισσότεραRegioselectivity in the Stille coupling reactions of 3,5- dibromo-2-pyrone.
Regioselectivity in the Stille coupling reactions of 3,5- dibromo-2-pyrone. Won-Suk Kim, Hyung-Jin Kim and Cheon-Gyu Cho Department of Chemistry, Hanyang University, Seoul 133-791, Korea Experimental Section
Διαβάστε περισσότεραSupporting information
Electronic Supplementary Material (ESI) for Organic & Biomolecular Chemistry. This journal is The Royal Society of Chemistry 2014 Supporting information Copper-catalysed intramolecular O-arylation: a simple
Διαβάστε περισσότεραCopper-mediated radical cross-coupling reaction of 2,2-dichloro-1,1,1-trifluoroethane (HCFC-123) with phenols or thiophenols. Support Information
Copper-mediated radical cross-coupling reaction of 2,2-dichloro-1,1,1-trifluoroethane (HCFC-123) with phenols or thiophenols Dr. Xiao un Tang and Prof. Qing un Chen* Key Laboratory of Organofluorine Chemistry,
Διαβάστε περισσότεραKishore Natte, Jianbin Chen, Helfried Neumann, Matthias Beller, and Xiao-Feng Wu*
Electronic Supplementary Material (ESI) for rganic & Biomolecular Chemistry. This journal is The Royal Society of Chemistry 204 Kishore Natte, Jianbin Chen, Helfried Neumann, Matthias Beller, and Xiao-Feng
Διαβάστε περισσότεραSupporting Information
Electronic Supplementary Material (ESI) for RSC Advances. This journal is The Royal Society of Chemistry 2017 Modular Synthesis of Propargylamine Modified Cyclodextrins by a Gold(III)-catalyzed Three Component
Διαβάστε περισσότεραSupporting Information
S1 Supporting Information Synthesis of 2-Arylated Hydroxytyrosol Derivatives via Suzuki-Myaura Cross-Coupling Roberta Bernini, a Sandro Cacchi, b* Giancarlo Fabrizi, b* Eleonora Filisti b a Dipartimento
Διαβάστε περισσότεραAsymmetric Synthesis of New Chiral β-amino Acid Derivatives by Mannich-type Reactions of Chiral N- Sulfinyl Imidates with N-Tosyl Aldimines
Asymmetric Synthesis of New Chiral β-amino Acid Derivatives by Mannich-type Reactions of Chiral N- Sulfinyl Imidates with N-yl Aldimines Filip Colpaert, Sven Mangelinckx, and Norbert De Kimpe Department
Διαβάστε περισσότεραFirst Total Synthesis of Antimitotic Compound, (+)-Phomopsidin
First Total Synthesis of Antimitotic Compound, (+)-Phomopsidin Takahiro Suzuki, a Kenji Usui, a Yoshiharu Miyake, a Michio Namikoshi, b and Masahisa Nakada a, * a Department of Chemistry, School of Science
Διαβάστε περισσότεραEco-friendly synthesis of diverse and valuable 2-pyridones by catalyst- and solvent-free thermal multicomponent domino reaction
Electronic Supplementary Material (ESI) for Green Chemistry. This journal is The Royal Society of Chemistry 2015 SUPPRTIG IFRMATI Eco-friendly synthesis of diverse and valuable 2-pyridones by catalyst-
Διαβάστε περισσότεραPhosphorus Oxychloride as an Efficient Coupling Reagent for the Synthesis of Ester, Amide and Peptide under Mild Conditions
Supplementary Information for Phosphorus xychloride as an Efficient Coupling Reagent for the Synthesis of Ester, Amide and Peptide under Mild Conditions u Chen,* a,b Xunfu Xu, a Liu Liu, a Guo Tang,* a
Διαβάστε περισσότεραLewis Acid Catalyzed Propargylation of Arenes with O-Propargyl Trichloroacetimidate: Synthesis of 1,3-Diarylpropynes
Supporting Information for Lewis Acid Catalyzed Propargylation of Arenes with O-Propargyl Trichloroacetimidate: Synthesis of 1,3-Diarylpropynes Changkun Li and Jianbo Wang* Beijing National Laboratory
Διαβάστε περισσότεραChiral Brønsted Acid Catalyzed Enantioselective Intermolecular Allylic Aminations. Minyang Zhuang and Haifeng Du*
Electronic Supplementary Material (ESI) for Organic & Biomolecular Chemistry. This journal is The Royal Society of Chemistry 2014 Chiral Brønsted Acid Catalyzed Enantioselective Intermolecular Allylic
Διαβάστε περισσότεραSUPPORTING INFORMATION. 1. General... S1. 2. General procedure for the synthesis of compounds 3 and 4 in the absence of AgOAc...
SUPPORTING INFORMATION Table of contents 1. General.... S1 2. General procedure for the synthesis of compounds 3 and 4 in the absence of AgOAc... S2 3. General procedure for the synthesis of compounds
Διαβάστε περισσότεραSupporting Information. Microwave-assisted construction of triazole-linked amino acid - glucoside conjugates as novel PTP1B inhibitors
Supporting Information Microwave-assisted construction of triazole-linked amino acid - glucoside conjugates as novel PTP1B inhibitors Xiao-Peng He, abd Cui Li, d Xiao-Ping Jin, b Zhuo Song, b Hai-Lin Zhang,
Διαβάστε περισσότεραPeptidomimetics as Protein Arginine Deiminase 4 (PAD4) Inhibitors
Peptidomimetics as Protein Arginine Deiminase 4 (PAD4) Inhibitors Andrea Trabocchi a, icolino Pala b, Ilga Krimmelbein c, Gloria Menchi a, Antonio Guarna a, Mario Sechi b, Tobias Dreker c, Andrea Scozzafava
Διαβάστε περισσότεραSupplement: Intramolecular N to N acyl migration in conformationally mobile 1 -acyl-1- systems promoted by debenzylation conditions (HCOONH 4
Cent. Eur. J. Chem. 9(5) 2011 S164-S175 DI: 10.2478/s11532-011-0082-y Central European Journal of Chemistry Supplement: Intramolecular to acyl migration in conformationally mobile 1 -acyl-1- benzyl-3,4
Διαβάστε περισσότεραSupplementary Data. Engineering, Nanjing University, Nanjing , P. R. China;
Supplementary Data Synthesis, Chemo-selective Properties of Substituted 9-Aryl-9H-fluorenes from Triarylcarbinols and Enantiomerical Kinetics of Chiral 9-Methoxy-11-(naphthalen-1-yl)-11H-benzo[a]fluorene
Διαβάστε περισσότεραIodine-catalyzed synthesis of sulfur-bridged enaminones and chromones via double C(sp 2 )-H thiolation
Electronic Supplementary Material (ESI) for Organic & Biomolecular Chemistry. This journal is The Royal Society of Chemistry 2017 Iodine-catalyzed synthesis of sulfur-bridged enaminones and chromones via
Διαβάστε περισσότεραTributylphosphine-Catalyzed Cycloaddition of Aziridines with Carbon Disulfide and Isothiocyanate
upporting Information Tributylphosphine-Catalyzed Cycloaddition of Aziridines with Carbon Disulfide and Isothiocyanate Jing-Yu Wu, Zhi-Bin Luo, Li-Xin Dai and Xue-Long Hou* a tate Key Laboratory of Organometallic
Διαβάστε περισσότεραConstruction of Cyclic Sulfamidates Bearing Two gem-diaryl Stereocenters through a Rhodium-Catalyzed Stepwise Asymmetric Arylation Protocol
Supporting Information for: Construction of Cyclic Sulfamidates Bearing Two gem-diaryl Stereocenters through a Rhodium-Catalyzed Stepwise Asymmetric Arylation Protocol Yu-Fang Zhang, Diao Chen, Wen-Wen
Διαβάστε περισσότεραSupporting Information For: Rhodium-Catalyzed Hydrofunctionalization: Enantioselective Coupling of Indolines and 1,3-Dienes
Supporting Information For: Rhodium-Catalyzed Hydrofunctionalization: Enantioselective Coupling of Indolines and 1,3-Dienes Xiao-Hui Yang and Vy M. Dong* dongv@uci.edu Department of Chemistry, University
Διαβάστε περισσότεραSupporting Information
Supporting Information Wiley-VCH 2008 69451 Weinheim, Germany Diphenylprolinol Silyl Ether as a Catalyst in an Enantioselective, Catalytic, Formal Aza [3+3] Cycloaddition Reaction for the Formation of
Διαβάστε περισσότεραHiyama Cross-Coupling of Chloro-, Fluoroand Methoxy- pyridyl trimethylsilanes : Room-temperature Novel Access to Functional Bi(het)aryl
Hiyama Cross-Coupling of Chloro-, Fluoroand Methoxy- pyridyl trimethylsilanes : Room-temperature Novel Access to Functional Bi(het)aryl Philippe Pierrat, Philippe Gros* and Yves Fort Synthèse Organométallique
Διαβάστε περισσότεραRh(III)-Catalyzed C-H Amidation with N-hydroxycarbamates: A. new Entry to N-Carbamate Protected Arylamines
Rh(III)-Catalyzed C-H Amidation with N-hydroxycarbamates: A new Entry to N-Carbamate Protected Arylamines Bing Zhou,* Juanjuan Du, Yaxi Yang,* Huijin Feng, Yuanchao Li Shanghai Institute of Materia Medica,
Διαβάστε περισσότεραSynthesis of novel 1,2,3-triazolyl derivatives of pregnane, androstane and D-homoandrostane. Tandem Click reaction/cu-catalyzed D-homo rearrangement
Electronic Supplementary Material (ESI) for Organic & Biomolecular Chemistry. This journal is The Royal Society of Chemistry 2014 Supporting Information Synthesis of novel 1,2,3-triazolyl derivatives of
Διαβάστε περισσότεραMetal-free Oxidative Coupling of Amines with Sodium Sulfinates: A Mild Access to Sulfonamides
Electronic Supplementary Material (ESI) for RSC Advances. This journal is The Royal Society of Chemistry 2014 Supporting information for Metal-free Oxidative Coupling of Amines with Sodium Sulfinates:
Διαβάστε περισσότεραSupporting Information
Supporting Information Wiley-VCH 2014 69451 Weinheim, Germany Copper-Catalyzed Coupling of Oxime Acetates with Sodium Sulfinates: An Efficient Synthesis of Sulfone Derivatives** Xiaodong Tang, Liangbin
Διαβάστε περισσότεραSupporting Information for
Electronic Supplementary Material (ESI) for Organic & Biomolecular Chemistry. This journal is The Royal Society of Chemistry 2015 Supporting Information for Quinine-Catalyzed Highly Enantioselective Cycloannulation
Διαβάστε περισσότεραSupporting Information
Supporting Information Selective Synthesis of xygen-containing Heterocycles via Tandem Reactions of 1,2-Allenic Ketones with Ethyl 4-Chloroacetoacetate Qiang Wang, a, b Zhouqing Xu b and Xuesen Fan a *
Διαβάστε περισσότεραOxyhalogenation of thiols and disulfides into sulfonyl chlorides/ bromides in water using oxone-kx(x= Cl or Br)
Electronic Supplementary Material (ESI) for Green Chemistry. This journal is The Royal Society of Chemistry 2014 Oxyhalogenation of thiols and disulfides into sulfonyl chlorides/ bromides in water using
Διαβάστε περισσότεραSupporting Information. Consecutive hydrazino-ugi-azide reactions: synthesis of acylhydrazines bearing 1,5- disubstituted tetrazoles
Supporting Information for Consecutive hydrazino-ugi-azide reactions: synthesis of acylhydrazines bearing 1,5- disubstituted tetrazoles Angélica de Fátima S. Barreto*, Veronica Alves dos Santos, and Carlos
Διαβάστε περισσότεραSupporting Information
Supporting Information Siloxy(trialkoxy)ethene Undergoes Regioselective [2+2] Cycloaddition to Ynones and Ynoates en route to Functionalized Cyclobutenediones Shin Iwata, Toshiyuki Hamura, and Keisuke
Διαβάστε περισσότεραSotto, 8; Perugia, Italia. Fax: ; Tel: ;
ELECTRONIC SUPPORTING INFORMATION Ermal Ismalaj a, Giacomo Strappaveccia a, Eleonora Ballerini a, Fausto Elisei a, Oriana Piermatti a, Dmitri Gelman b, Luigi Vaccaro a a CEMIN - Dipartimento di Chi mica,
Διαβάστε περισσότεραDiastereoselective Access to Trans-2-Substituted Cyclopentylamines
Supporting Information Diastereoselective Access to Trans-2-Substituted Cyclopentylamines Antoine Joosten, Emilie Lambert, Jean-Luc Vasse, Jan Szymoniak jean-luc.vasse@univ-reims.fr jan.szymoniak@univ-reims.fr
Διαβάστε περισσότεραSupporting Information. Experimental section
Electronic Supplementary Material (ESI) for RSC Advances. This journal is The Royal Society of Chemistry 2014 Supporting Information Experimental section General. Anhydrous solvents were transferred by
Διαβάστε περισσότεραSupporting Information
Supporting Information Metal-catalyzed Stereoselective and Protecting-group-free Synthesis of 1,2-cis-Glycosides Using 4,6-Dimethoxy-1,3,5-triazin-2-yl Glycosides as Glycosyl Donors Tomonari Tanaka,* 1
Διαβάστε περισσότεραSupporting Information for Iron-catalyzed decarboxylative alkenylation of cycloalkanes with arylvinylic carboxylic acids via a radical process
Supporting Information for Iron-catalyzed decarboxylative alkenylation of cycloalkanes with arylvinylic carboxylic acids via a radical process Jincan Zhao 1, Hong Fang 1, Jianlin Han* 1,2 and Yi Pan* 1
Διαβάστε περισσότεραFluorinative Ring-opening of Cyclopropanes by Hypervalent Iodine Reagents. An Efficient Method for 1,3- Oxyfluorination and 1,3-Difluorination
Electronic Supplementary Material (ESI) for Chemical Science. This journal is The Royal Society of Chemistry 2016 Supporting Information Fluorinative Ring-opening of Cyclopropanes by Hypervalent Iodine
Διαβάστε περισσότεραSupporting Information
Electronic Supplementary Material (ESI) for rganic Chemistry Frontiers. This journal is the Partner rganisations 2018 Palladium-catalyzed direct approach to α-cf 3 aryl ketones from arylboronic acids Bo
Διαβάστε περισσότεραThe N,S-Bidentate Ligand Assisted Pd-Catalyzed C(sp 2 )-H. Carbonylation using Langlois Reagent as CO Source. Supporting Information.
Electronic upplementary Material (EI) for rganic & Biomolecular Chemistry. This journal is The Royal ociety of Chemistry 2018 The,-Bidentate Ligand Assisted Pd-Catalyzed C(sp 2 )-H Carbonylation using
Διαβάστε περισσότεραSupporting Information
Electronic Supplementary Material (ESI) for Organic & Biomolecular Chemistry. This journal is The Royal Society of Chemistry 2018 Supporting Information Silver or Cerium-Promoted Free Radical Cascade Difunctionalization
Διαβάστε περισσότεραSynthesis of eunicellane-type bicycles embedding a 1,3- cyclohexadiene moiety
Supporting Information for Synthesis of eunicellane-type bicycles embedding a 1,3- cyclohexadiene moiety Alex Frichert, 1 Peter G. Jones, 2 and Thomas Lindel*,,1 Address: 1 Institute of Organic Chemistry,
Διαβάστε περισσότεραCatalyst-free transformation of levulinic acid into pyrrolidinones with formic acid
Catalyst-free transformation of levulinic acid into pyrrolidinones with formic acid Yawen Wei, a Chao Wang,* a Xue Jiang, a Dong Xue, a Zhao-Tie Liu, a and Jianliang Xiao* a,b a Key Laboratory of Applied
Διαβάστε περισσότεραSupporting Information
Electronic upplementary Material (EI) for Green Chemistry. This journal is The Royal ociety of Chemistry 204 upporting Information ynthesis of sulfonamides via I 2 -mediated reaction of sodium sulfinates
Διαβάστε περισσότεραSupporting Information
Supporting Information Regioselective Reversal in the Cyclization of 2-Diazo-3,5-dioxo-6-ynoates (ynones, ynamide): Construction of -Pyrones and 3(2H)-Furanones Starting from Identical Materials Feng Wang,
Διαβάστε περισσότεραEfficient and Simple Zinc mediated Synthesis of 3 Amidoindoles
Electronic Supplementary Material (ESI) for rganic and Biomolecular Chemistry SUPPRTIG IFRMATI Efficient and Simple Zinc mediated Synthesis of 3 Amidoindoles Anahit Pews-Davtyan and Matthias Beller* Leibniz-Institut
Διαβάστε περισσότεραAcrylate Esters for Synthesis of Chiral γ-lactams and Amino Acids
Electronic Supplementary Material (ESI) for Organic & Biomolecular Chemistry. This journal is The Royal Society of Chemistry 2015 Supplementary Information for: Highly Efficient Asymmetric Hydrogenation
Διαβάστε περισσότεραSUPPORTING INFORMATION. Transition Metal-Free Arylations of In-Situ Generated Sulfenates with Diaryliodonium Salts
S1 SUPPORTING INFORMATION Transition Metal-Free Arylations of In-Situ Generated Sulfenates with Diaryliodonium Salts Hao Yu, Zhen Li, and Carsten Bolm* Institute of Organic Chemistry, RWTH Aachen University
Διαβάστε περισσότεραSynthesis and evaluation of novel aza-caged Garcinia xanthones
Electronic Supplementary Material (ESI) for rganic & Biomolecular Chemistry Synthesis and evaluation of novel aza-caged Garcinia xanthones Xiaojin Zhang, a,1 Xiang Li, a,1 Haopeng Sun, * b Zhengyu Jiang,
Διαβάστε περισσότεραSupporting Information
Supporting Information Lewis Acid Mediated [2,3]-Sigmatropic Rearrangement of Allylic α-amino Amides. Jan Blid, Peter Brandt, Peter Somfai*, Department of Chemistry, rganic Chemistry, Royal Institute of
Διαβάστε περισσότεραgem-dichloroalkenes for the Construction of 3-Arylchromones
Electronic Supplementary Material (ESI) for ChemComm. This journal is The Royal Society of Chemistry 2015 Pd(OAc)2/S=PPh3 Accelerated Activation of gem-dichloroalkenes for the Construction of 3-Arylchromones
Διαβάστε περισσότεραSupporting Information
Supporting Information Transition-metal-free Ring Expansion Reactions of Indene-1,3-dione: Synthesis of Functionalized Benzoannulated Seven-Membered Ring Compounds Qiyi Yao, Lingkai Kong, Mengdan Wang,
Διαβάστε περισσότεραFerric(III) Chloride Catalyzed Halogenation Reaction of Alcohols and Carboxylic Acids using - Dichlorodiphenylmethane
Supporting Information Ferric(III) Chloride Catalyzed Halogenation Reaction of Alcohols and Carboxylic Acids using - Dichlorodiphenylmethane Chang-Hee Lee,, Soo-Min Lee,, Byul-Hana Min, Dong-Su Kim, Chul-Ho
Διαβάστε περισσότεραElectronic Supplementary Information (ESI)
Electronic Supplementary Material (ESI) for rganic & Biomolecular Chemistry Electronic Supplementary Information (ESI) For Iron-Catalysed xidative Amidation of Alcohols with Amines Silvia Gaspa, a Andrea
Διαβάστε περισσότεραSupporting Information for. Catalytic C H α-trifluoromethylation of α,β-unsaturated Carbonyl Compounds
Supporting Information for Catalytic C H α-trifluoromethylation of α,β-unsaturated Carbonyl Compounds Zhongxue Fang, a Yongquan Ning, a Pengbing Mi, a Peiqiu Liao, a Xihe Bi* a,b a Department of Chemistry,
Διαβάστε περισσότεραFree Radical Initiated Coupling Reaction of Alcohols and. Alkynes: not C-O but C-C Bond Formation. Context. General information 2. Typical procedure 2
Free Radical Initiated Coupling Reaction of Alcohols and Alkynes: not C-O but C-C Bond Formation Zhongquan Liu,* Liang Sun, Jianguo Wang, Jie Han, Yankai Zhao, Bo Zhou Institute of Organic Chemistry, Gannan
Διαβάστε περισσότεραNovel and Selective Palladium-Catalyzed Annulation of 2-Alkynylphenols to Form 2-Substituted 3-Halobenzo[b]furans. Supporting Information
Novel and Selective Palladium-Catalyzed Annulation of 2-Alkynylphenols to Form 2-Substituted 3-Halobenzo[b]furans Liang Yun, Shi Tang, Xu-Dong Zhang, Li-Qiu Mao, Ye-Xiang Xie and Jin-Heng Li* Key Laboratory
Διαβάστε περισσότεραSupporting Information
Supporting Information Gold-catalyzed Cycloisomerization of 1,6-Diyne-4-en-3-ols to form Naphthyl Ketone Derivatives. Jian-Jou Lian and Rai-Shung Liu* Department of Chemistry, National Tsing-Hua University,
Διαβάστε περισσότερα