Supporting Information for. Palladium-catalyzed Addition Reaction of Aroyl/Heteroaroyl Acid Anhydrides to Norbornenes
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- ŌἈμφίων Μανιάκης
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1 Electronic Supplementary Material (ESI) for ChemComm. This journal is The Royal Society of Chemistry 2014 Supporting Information for Palladium-catalyzed Addition Reaction of Aroyl/Heteroaroyl Acid Anhydrides to Norbornenes Mieko Arisawa, Saori Tanii, Masahiko Yamaguchi Department of Organic Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba, Sendai, , Japan Contents Page S2 Supplementary Materials Page S2 Typical procedure and The Spectral and Analytical Data Page S10 Reference Page S11 1 H- and 13 C- NMR Chart S1
2 Supplimentary Materials 1 H-, 13 C-NMR spectra were recorded on a Varian Mercury (400 MHz) and tetramethylsilane were used as standard. IR spectra were measured on a JASCO FT/IR-410 spectrophotometer. Melting points were determined with a Yanagimoto micro melting point apparatus without correction. Highand low-resolution mass spectra were measured on a JEOL JMS-DX-303, ajeol JMS-700, or a JMS-T100GC spectrometer. X-ray diffraction data were recorded on Rigaku R-AXIIS RAPID. Kanto Chemical. CO., INC. silica gel 60 ( µm) was employed for flash column chromatography. Typical procedures for synthesis of the (1R*,2S*,3S*,4S*)-2-benzoyl-3-benzoyloxy-bicyclo[2,2,1]hept-5-ene (3a) In a two-necked flask equipped with a magnetic stirrer bar were placed Pd 2 (dba) 3 (10.0 mol%, 22.9 mg), 1,2-bis(diphenylphosphino)propane (dppp, 20 mol%, 20.6 mg), benzoic acid anhydride 2a (0.25 mmol, 56.6 mg), and norbornadiene 1 (1.00 mmol, µl) in THF (0.5 ml) under an argon atmosphere, and the solution was heated at reflux for 6 h. Then, the solvent was removed under reduced pressure, and the residue was purified by flash column chromatography on silica gel giving (1R*,2S*,3S*,4S*)-2-benzoyl-3-benzoyloxy-bicyclo[2,2,1]hept-5-ene 3a (62.8 mg, 79%): Colorless solid. Mp o C (Hexane/Ether = 9/1). 1 H-NMR (400 MHz, CDCl 3 ) δ 1.80 (1H, dd, J = 1.6, 8.8 Hz), 2.09 (1H, d, J = 8.8 Hz), 3.20 (1H, m), 3.27 (1H, bs), 3.88 (1H, t, J = 3.2 Hz), 5.26 (1H, t, J = 1.6 Hz), 6.09 (1H, dd, J = 2.8, 5.6 Hz), 6.22 (1H, dd, J = 3.2, 5.6 Hz), 7.43 (4H, m), 7.55 (2H, m), 7.98 (2H, m), 8.06 (2H, m). 13 C-NMR (100 MHz, CDCl 3 ) δ 46.2, 47.6, 48.5, 55.3, 77.4, 128.3, 128.4, 128.6, 129.5, 130.3, 132.9, 133.0, 133.5, 136.6, 136.7, 166.1, IR (KBr) 3064, 2993, 1712, 1672, 1449, 1385, 1273, 1221, 1116, 714, 688 cm -1. MS (EI) m/z 105 (M + -C 14 H 13 O 2, 100%), 253 (M + -C 5 H 5, 25%), 318 (M +, 3%). HRMS Calcd for C 21 H 18 O 3 : Found: X Ray Crystallography: CCDC contains the supplementary crystallographic data for this paper. This data can be obtained free of charge from the Cambridge Crystallographic Data Centre via Crystal data and structure refinement Crystal data for 3a: C 21 H 18 O 3, M = , monoclinic, a = (15) Å, b = (3) Å, c = (2) Å, α = 90.00, β = (5), γ = 90.00, V = (5) Å 3, T = 373(2) K, space group P21/c, Z = 4, µ(mokα) = mm -1, reflection measured, 3723 independent reflections (R int = ). The final R 1 values were (I > 2σ(I)). The final wr(f 2 ) values were (I > 2σ(I)). The final R 1 values were (all data). The final wr(f 2 ) values were (all data). The goodness of fit on F 2 was CCDC number CCDC S2
3 O O O (1R*,2S*,3S*,4S*)-2-(p-toluoyl)-3-(p-toluoyloxy)-bicyclo[2,2,1]hept-5-ene (3b) Colorless solid. Mp o C (Hexane/Ether =9/1). 1 H-NMR (400 MHz, CDCl 3 ) δ 1.78 (1H, dd, J = 1.6 Hz, 8.4 Hz), 2.07 (1H, d, J = 8.8Hz), 2.39 (3H, bs), 2.42 (3H, bs), 3.17 (1H, bs), 3.24 (1H, bs), 3.84 (1H, t, J = 3.2 Hz), 5.23 (1H, s), 6.10 (1H, dd, J = 3.2, 5.6 Hz), 6.20 (1H, dd, J = 3.2, 5.6 Hz), 7.23 (4H, t, J = 8.4 Hz), 7.87 (2H, d, J = 8.0 Hz), 7.94 (2H, d, J = 8.0 Hz). 13 C-NMR (100 MHz, CDCl 3 ) δ 21.6, 21.7, 46.1, 47.5, 48.5, 55.3, 127.6, 128.5, 129.1, 129.2, 129.6, 133.4, 134.1, 137.0, 143.6, 143.7, 166.2, IR (KBr). 3065, 2980, 1707, 1668, 1607, 1331, 1273, 1108, 1019, 754, 728 cm -1. MS (EI) m/z 119 (M + -C 15 H 14 O 2, 100%), 227 (M + -C 15 H 14 O 2, 3%), 281 (M + -C 5 H 5, 15%), 346 (M +, 3%). HRMS Calcd for C 23 H 22 O 3 : Found: (1R*,2S*,3S*,4S*)-2-(p-chlorobenzoyl)-3-(p-chlorobenzoyloxy)-bicyclo[2,2,1]hept-2-ene (3c) Colorless solid. Mp o C (Hexane/Ether = 9/1). 1 H-NMR (400 MHz, CDCl 3 ) δ 1.82 (1H, dd, J = 1.2, 8.8 Hz), 2.08 (1H, d, J = 8.8 Hz), 3.19 (1H, bs), 3.24 (1H, bs), 3.80 (1H, t, J = 1.2 Hz), 5.23 (1H, bs), 6.06 (1H, dd, J = 1.2, 2.8 Hz), 6.22 (1H, dd, J = 0.8, 2.4 Hz), 7.40 (2H, d, J = 2.4 Hz), 7.42 (2H, d, J = 2.4 Hz), 7.91 (2H, d, J = 8.4 Hz), 7.98 (2H, d, J = 8.8 Hz). 13 C-NMR (100 MHz, CDCl 3 ) δ 46.2, 47.7, 48.4, 55.3, 77.7, 128.6, 128.8, 129.0, 129.8, 130.9, 133.6, 134.8, 136.6, 139.5, 139.6, 165.3, IR (KBr) 2975, 2886, 1716, 1678, 1589, 1487, 1401, 1333, 1275, 1215, 826, 759. MS (EI) m/z 139 (M + -C 14 H 4 O 2 Cl, 100%), 321 (M + -C 5 H 5, 25%), 388 (M +, 4%). HRMS Calcd for C 21 H 16 Cl 2 O 3 : Found: (1R*,2S*,3S*,4S*)-2-(o-toluoyl)-3-(o-toluoyloxy)-bicyclo[2,2,1]hept-5-ene (3d) Yellow oil. 1 H-NMR (400 MHz, CDCl 3 ) δ 1.76 (1H, dd, J = 1.2, 8.8 Hz), 2.00 (1H, d, 8.4 Hz), 2.43 S3
4 (3H, bs), 2.59 (3H, bs), 3.16 (2H, bs), 3.73 (1H, t, J = 2.8 Hz), 5.18 (1H, bs), 6.13 (1H, dd, J = 2.4, 5.6 Hz), 6.22 (1H, dd, J = 3.2, 5.2 Hz), 7.23 (4H, m), 7.33 (1H, t, J = 6.8 Hz), 7.40 (1H, t, J = 1.6 Hz), 7.60 (1H, d, J = 7.6 Hz), 7.91 (1H, d, J = 8.8 Hz). 13 C-NMR (100 MHz, CDCl 3 ) δ 20.8, 21.8, 45.5, 47.6, 48.4, 58.0, 77.3, 125.4, 125.7, 128.0, 129.7, 130.4, 130.9, 131.7, 131.8, 131.9, 133.7, 137.0, 137.9, 138.1, 140.1, 167.1, IR (neat) 3065, 2978, 2929, 1717, 1687, 1602, 1573, 1487, 1380, 1292, 1255, 1142, 1076, 740, 721. MS (EI) m/z 119 (M + -C 15 H 14 O 2, 100%), 281 (M + -C 5 H 5, 10%), 346 (M +, 3%). HRMS Calcd for C 23 H 22 O 3 : Found: (1R*,2S*,3S*,4S*)-2-(m-anisoyl)-3-(m-anisoyloxy)-bicyclo[2,2,1]hept-5-ene (3e) Colorless oil. 1 H-NMR (400 MHz, CDCl 3 ) δ 1.80 (1H, dd, J = 1.6, 8.8 Hz), 2.08 (1H, d, J = 8.8 Hz), 3.19 (1H, bs), 3.27 (1H, bs), 3.81 (3H, s), 3.85 (3H, s), 5.24 (1H, bs), 6.10 (1H, dd, J = 2.3, 3.2 Hz), 6.22 (1H, dd, J = 2.4, 3.2 Hz), 7.10 (2H, m), 7.35 (2H, q, J = 8.0 Hz), 7.50 (1H, t, J = 2.0 Hz), 7.56 (2H, m), 7.65 (1H, d, J = 8.0 Hz). 13 C-NMR (100 MHz, CDCl 3 ) δ 46.3, 47.6, 48.4, 55.4, 55.4, 55.4, 77.6, 112.6, 114.3, 119.3, 119.6, 120.9, 121.9, 120.4, 129.5, 131.6, 133.5, 136.9, 137.9, 159.6, 159.8, 166.0, IR (neat) 3072, 2979, 2943, 2874, 1716, 1682, 1584, 1487, 1432, 1329, 1278, 1228, , 879. MS (EI) m/z 135 (M + -C 15 H 15 O 3, 100%), 313 (M + -C 5 H 5, 9%), 378 (M +, 5%). HRMS Calcd for C 23 H 22 O 5 : Found: (1R*,2S*,3S*,4S*)-2-(m-toluoyl)-3-(m-toluoyloxy)-bicyclo[2,2,1]hept-5-ene (3f) Yellow oil. 1 H-NMR (400 MHz, CDCl 3 ) δ 1.79 (1H, dd, J = 1.6, 8.8 Hz), 2.09 (d, J = 8.8 Hz), 2.34 (3H, bs), 2.41 (3H, bs), 3.18 (1H, bs), 3.25 (1H, bs), 3.86 (1H, t, J = 2.8 Hz), 5.23 (1H, bs), 6.12 (1H, dd, J = 2.8, 5.6 Hz), 6.20 (1H, dd, J = 3.2, 5.6 Hz), 7.33 (4H, m), 7.76 (2H, m), 7.86 (2H, m). 13 C-NMR (100 MHz, CDCl 3 ) δ 21.2, 21.3, 46.9, 47.5, 48.5, 55.4, 77.4, 125.5, 126.7, 128.2, 128.4, 128.9, 130.4, 130.2, 133.4, 133.7, 133.7, 136.7, 137.0, 138.1, 166.3, IR (neat) 3064, 2980, 2871, 1716, 1681, 1604, 1587, 1486, 1428, 1277, 1199, 1166, 746, 703. MS (EI) m/z 119 (M + -C 15 H 14 O 2, 100%), 281 (M + -C 5 H 5, 15%), 346 (M +, 3%). HRMS Calcd for C 23 H 22 O 3 : Found: (1R*,2S*,3S*,4S*)-2-(m-trifluorometylphenoyl)-3-(m-trifluoromethylphenoyloxy)-bicyclo[2,2,1 ]hept-5-ene (3g) Colorless oil. 1 H-NMR (400 MHz, CDCl 3 ) δ 1.87 (1H, dd, J = 1.6, 8.8 Hz), 2.13 (1H, d, J = 8.8 Hz), 3.23 (1H, s), 3.29 (1H, s), 3.87 (1H, t, J = 2.8 Hz), 5.27 (1H, s), 6.10 (1H, dd, J = 2.4, 6.0 Hz), 6.24 (1H, dd, J = 3.6, 5.6 Hz), 7.60 (2H, t, J = 8.0 Hz), 7.82 (2H, t, J = 9.6 Hz), 8.16 (1H, d, J = 8.0 Hz), 8.23 (2H, m), 8.30 (1H, s). 13 C-NMR (100 MHz, CDCl 3 ) δ 46.1, 47.7, 48.4, 55.5, 78.0, 119.6, 122.3, 125.0, (dd), (dd), 127.7, 129.1, 129.4, (dddd), 130.9, 131.5, 132.8, 133.6, 136.7, 137.0, 164.9, IR (neat) 1986, 1721, 1689, 1613, 1239,1334, 1254, 1072, 999, 758, 696. MS S4
5 (EI) m/z 173 (M + -C 15 H 12 F 3 O 2, 100%), 389 (M + -C 5 H 5, 25%), 454 (M +, 3%). HRMS Calcd for C 23 H 16 F 6 O 3: Found: (1R*,2S*,3S*,4S*)-2-(2-furoyl)-3-(2-furoyloxy)-bicyclo[2,2,1]hept-5-ene (3h) Yellow oil. 1 H-NMR (400 MHz, CDCl 3 ) δ 1.78 (1H, dd, J = 1.6, 8.8 Hz), 2.03 (1H, d, J = 7.6 Hz), 3.17 (1H, bs), 3.31 (1H, bs), 3.67 (1H, t, J = 3.2 Hz), 5.21 (1H, bs), 6.13 (1H, dd, J = 2.4, 6.0 Hz), 6.20 (1H, dd, J = 2.8, 5.6 Hz), 6.52 (2H, m), 7.20 (2H, t, J = 3.2 Hz), 7.56 (2H, m). 13 C-NMR (100 MHz, CDCl 3 ) δ 45.8, 47.5, 48.4, 55.4, 77.2, 111.8, 112.2, 117.0, 118.0, 133.5, 136.9, 144.8, 146.1, 146.3, 152.6, 158.3, IR (KBr) 3136, 2938, 1717, 1671, 1568, 1396, 1297, 1231, 768 cm -1. MS (EI) m/z 95 (M + -C 12 H 11 O 3, 100%), 233 (M + -C 5 H 5, 80%), 298 (M +, 10%). HRMS Calcd for C 17 H 14 O 5 : Found: (1R*,2S*,3S*,4S*)-2-(2-thienoyl)-3-(2-thienoyloxy)-bicyclo[2,2,1]hept-5-ene (3i) Colorless solid. Mp o C (Hexane/AcOEt = 8/1). 1 H-NMR (400 MHz, CDCl 3 ) δ 1.79 (1H, dd, J = 1.6, 8.8 Hz), 2.03 (1H, d, J = 8.8 Hz), 3.19 (1H, s), 3.28 (1H, s), 3.70 (1H, t, J = 2.8 Hz), 5.18 (1H, s), 6.19 (2H, m), 7.11 (2H, m), 7.57 (1H, dd, J = 1.2, 4.8 Hz), 7.62 (1H, dd, J = 1.2, 5.2 Hz), 7.76 (1H, dd, J = 1.2, 4.0 Hz), 7.82 (1H, dd, J = 1.2, 4.0 Hz). 13 C-NMR (100 MHz, CDCl 3 ) δ 46.4, 47.4, 48.5, 56.2, 77.8, 127.8, 128.1, 131.8, 132.5, 133.3, 133.5, 133.6, 133.8, 137.2, 144.0, 161.7, IR (KBr) 2973, 2872, 1792, 1651, 1520, 1415, 1281, 1260, 1097, 721 cm -1. MS (EI) m/z 111 (M + -C 12 H 11 O 2 S, 100%), 265 (M + -C 5 H 5, 35%) 330 (M +, 12%)HRMS Calcd for C 17 H 14 O 3 S 2 : Found: (1R*,2S*,3S*,4S*)-2-picolinoyl-3-picolinoyloxy-bicyclo[2,2,1]hept-5-ene (3j) Brown oil. 1 H-NMR (400 MHz, CDCl 3 ) δ 1.81 (1H, dd, J = 1.6, 8.8 Hz), 2.22 (1H, d, J = 8.8 Hz), 3.29 (1H, s), 3.43 (1H, s), 4.46 (1H, t, J = 3.2 Hz), 5.29 (1H, s), 6.05 (1H, dd, J = 2.8, 5.6 Hz), 6.26 (1H, dd, J = 3.2, 5.6 Hz), 7.45 (2H, m), 7.82 (2H, m), 8.10 (1H, d, J = 7.6 Hz), 8.50 (1H, d, J = 7.6 Hz), 8.61 (1H, dd, J = 0.8, 4.8 Hz), 8.77 (1H, dd, J = 0.8, 4.8 Hz). 13 C-NMR (100 MHz, CDCl 3 ) δ 46.6, 48.3, 48.5, 54.1, 78.4, 122.3, 125.1, 126.7, 127.0, 133.8, 136.8, 136.9, 148.3, 148.8, 149.9, 153.0, 165.1, IR (neat) 3056, 2983, 1736, 1715, 1583, 1331, 1306, 1133, 746, 687 cm -1. MS (EI) m/z 106 (M + -C 13 H 12 N 1 O 2, 90%), 255 (M + -C 5 H 5, 100%), 320 (M +, 15%). HRMS Calcd for C 19 H 16 N 2 O 3 : Found: (1R*,2S*,3S*,4S*)-2-nicotinoyl-3-nicotinoyloxy-bicyclo[2,2,1]hept-5-ene (3k) Brown oil. 1 H-NMR (400 MHz, CDCl 3 ) δ 1.88 (1H, dd, J = 1.6, 9.2 Hz), 2.12 (1H, d, J = 8.8 Hz), 3.25 (1H, s), 3.84 (1H, t, J = 2.8 Hz), 5.30 (1H, s), 6.06 (1H, dd, J = 2.8, 5.6 Hz), 6.27 (1H, dd, J = 3.2, 5.2 Hz), 7.42 (2H, m), 8.28 (2H, m), 8.79 (2H, dt, J = 1.6, 4.8 Hz), 9.20 (1H, d, J = 2.0 Hz), 9.24 S5
6 (1H, d, J = 2.0 Hz). 13 C-NMR (100 MHz, CDCl 3 ) δ 46.3, 47.9, 48.4, 55.6, 77.7, 123.4, 123.8, 126.0, 131.8, 133.9, 135.8, 136.3, 137.1, 149.7, 150.8, 153.5, 153.6, 165.0, IR (neat) 2981, 1719, 1691, 1589, 1419, 1331, 1282, 1118, 742, 704 cm -1. MS (EI) m/z 106 (M + -C 13 H 13 NO 2, 100%), 255 (M + -C 5 H 5, 78%), 320 (M +, 5%).HRMS Calcd for C 19 H 16 N 2 O 3 : Found: (1R*,2R*,3R*,4S*)-2-benzoyl-3-benzoyloxy-bicyclo[2,2,1]heptane (4a) Colorless solid. Mp o C (Hexane). 1 H-NMR (400 MHz, CDCl 3 ) δ 1.16 (1H, dd, J = 1.6, 8.8 Hz), 1.28 (1H, d, J = 8.8 Hz), 1.50 (2H, m), 1.64 (2H, m), 2.03 (1H, d, J = 10.0 Hz), 2.60 (1H, d, J = 4.8 Hz), 2.74 (1H, s), 3.76 (1H, s), 5.37 (1H, s), 7.45 (4H, m), 7.54 (2H, m), 8.01 (4H, d, J=7.2 Hz). 13 C-NMR (100 MHz, CDCl 3 ) δ 28.3, 23.7, 38.2, 41.3, 42.4, 58.0, 78.6, 128.3, 128.5, 128.6, 129.5, 130.5, 132.8, 133.0, 136.8, 165.9, IR (KBr) 2970, 1772, 1669, 1449, 1382, 1313, 1275, 1114, 714, 698 cm -1. MS (EI) m/z 105 (M + -C 14 H 15 O 2, 100%), 320 (M +, 33%). HRMS Calcd for C 21 H 18 O 3 : Found: The trans-stereochemistry was determined by NMR studies. 4a exhibited NOE between proton adjacent to benzoyl group at δ 3.76 and bridged methylene proton at δ 2.03, as well as proton adjacent to benzoate group at δ 5.73 and methylene group at δ δ 2.03 NOE H H δ 3.76 OCOPh δ 1.49 H H COPh δ 5.37 NOE (1R*,2S*,3S*,4S*)-2-benzoyl-3-benzoyloxy-1,2,3,4-tetrahydro-1,4-methanonaphtalene (5a) Colorless solid. Mp o C (Hexane/AcOEt = 8/1). 1 H-NMR (400 MHz, CDCl 3 ) δ 2.13 (1H, dd, J = 1.6, 9.2 Hz), 2.46 (1H, d, J = 9.2 Hz), 3.70 (1H, s), 3.74 (1H, d, J = 2.4 Hz), 4.13 (1H, dd, J = 1.2, 2.4 Hz), 5.44 (1H, s), 6.76 (1H, d, J = 7.2 Hz), 7.03 (1H, dt, J = 3.2, 5.6 Hz), 7.16 (1H, t, J = 7.6 Hz), 7.38 (1H, d, J = 7.2 Hz), 7.46 (4H, m), 7.57 (2H, m), 7.91 (2H, d, J = 7.6 Hz), 8.06 (2H, d, J = 7.6 Hz). 13 C-NMR (100 MHz, CDCl 3 ) δ 48.2, 48.5, 49.8, 56.8, 77.7, 122.4, 122.8, 126.5, 127.0, 128.4, 128.6, 129.6, 130.3, 132.9, 133.0, 136.8, 142.4, 144.0, 166.0, IR (KBr) 2995, 2974, 1717, 1686, 1447, 1325, 1277, 1222, 1111, 756, 712, 691 cm -1. MS (EI) m/z 105 (M + -C 18 H 15 O 2, 100%), 368 (M + ). Calcd for C 25 H 20 O 3 : Found: The trans-stereochemistry was determined by NMR studies. 5a exhibited NOE between proton adjacent to benzoyl group at δ 4.13 and bridged methylene proton at δ 2.46, as well as proton adjacent to benzoyloxy group at δ 5.44 and proton of o-position in phenyl group at δ S6
7 Typical procedure for the synthesis of 5-benzoyl-3a,4,7,7a-tetrahydro-1H-4,7-methanoindene and 6-benzoyl-3a,4,7,7a- tetrahydro-1h-4,7-methanoindene (6a and 6a ) In a two-necked flask equipped with a magnetic stirrer bar were placed Pd 2 (dba) 3 (10.0 mol%, 22.9 mg), dppp (20 mol%, 20.6 mg), benzoic acid anhydride 2a (0.25 mmol, 56.6 mg), and dicyclopentadiene 6 (1.00 mmol, mg) in THF (0.5 ml) under an argon atmosphere, and the solution was heated at reflux for 6 h. Then, the solvent was removed under reduced pressure, and the residue was purified by flash column chromatography on silica gel giving a mixture of 5-benzoyl-3a,4,7,7a-tetrahydro-1H-4,7-methanoindene 6a and 6-benzoyl-3a,4,7,7a-tetrahydro-1H-4,7-methanoindene 6a (57.4 mg, 2:1, 97%). For structure determination, 6a and 6a were separated by HPLC. 5-benzoyl-3a,4,7,7a-tetrahydro-1H-4,7-methanoindene (6a) Colorless solid. Mp o C (Hexane). 1 H-NMR (400 MHz, CDCl 3 ) δ 1.47 (1H, dd, J = 0.8, 8.4 Hz), 1.69 (2H, m), 2.24 (1H, m), 2.88 (1H, m), 3.16 (1H, s), 3.41 (1H, t, J = 2.8 Hz), 3.47 (1H, m), 5.40 (1H, dd, J = 1.6, 6.0 Hz), 5.63 (1H, dd, J = 2.4, 6.0 Hz), 6.62 (1H, d, J = 2.8 Hz), 7.39 (2H, t, J = 7.6), 7.48 (1H, t, J = 7.2 Hz), 7.67 (2H, dd, J = 0.4, 7.6 Hz). 13 C-NMR (100 MHz, CDCl 3 ) δ 34.3, 40.8, 46.5, 48.3, 50.2, 54.2, 128.0, 128.7, 130.9, 131.6, 133.4, 138.8, 145.7, 152.1, IR (KBr) 2958, 1631, 1598, 1574, 1444, 1345, 1283, 1168, 920, 718, 670 cm -1. MS (EI) HRMS m/z 105 (M + -C 10 H 11, 100%), 171 (M + -C 5 H 5, 97%), 236 (M +, 18%) Calcd for C 17 H 16 O: Found: The position of benzoyl group was determined by NMR studies. 6a exhibited NOE between methylene proton in cyclopentadiene ring at δ 1.69 and 6-position alkene position at δ Ph O δ 6.62 H NOE H δ benzoyl-3a, 4,7,7a-tetrahydro-1H-4,7-methanoindene (6a ) Colorless oil. 1 H-NMR (400 MHz, CDCl 3 ) δ 1.49 (1H, d, J = 8.4 Hz), 1.74 (1H, d, J = 8.8 Hz), 1.87 (1H, m), 2.26 (1H, m), 2.92 (1H, m), 3.16 (1H, m), 3.45 (1H, m), 3.58 (1H, d, J = 3.6 Hz), 5.51 (1H, S7
8 m), 6.60 (1H, d, J = 3.6 Hz), 7.39 (2H, t, J = 7.2 Hz), 7.49 (1H, t, J = 7.6 Hz), 7.67 (2H, d, J = 6.8 Hz). 13 C-NMR (100 MHz, CDCl 3 ) δ 34.3, 40.8, 46.5, 48.2, 50.2, 54.2, 128.0, 128.7, 139.0, 131.6, 133.4, 138.8, 125.7, 152.1, IR (neat) 2974, 1637, 1598, 1578, 1446, 1356, 1172, 734, 668 cm -1. MS (EI) HRMS m/z 105 (M + -C 10 H 11, 100%), 171 (M + -C 5 H 5, 65%), 236 (M +, 19%)Calcd for C 17 H 16 O: Found: The regiochemistry of benzoyl group was determined by NMR studies. The 6a exhibited NOE between alkene proton in cyclopentadiene ring at δ 5.51 and 5-position alkene proton at δ Ph O δ 6.60 H NOE H δ 5.51 Palladium-catalyzed addition of 7 and m-toluic acid (8, Scheme 4) In a two-necked flask equipped with a magnetic stirrer bar were placed Pd 2 (dba) 3 (10 mol%, 22.9 mg), dppp (20 mol%, 20.6 mg), m-toluic acid (0.25 mmol, 34.0 mg), and 2-benzoyl-bicylo[2,2,1]hept-2,5-diene 7 [1] (0.25 mmol, 49.1 mg) in THF (0.5 ml) under an argon atmosphere, and the solution was heated at reflux for 6 h. Then, the solvent was removed under reduced pressure, and the residue was purified by flash column chromatography on silica gel giving (1R*,2S*,3S*,4S*)-2-benzoyl-3-(m-toluoyloxy)-bicyclo[2,2,1]hept-5-ene 8 (71.3 mg, 86%): Colorless oil. 1 H-NMR (400 MHz, CDCl 3 ) δ 1.80 (1H, dd, J = 1.6, 8.8 Hz), 2.10 (1H, d, J = 8.8 Hz), 2.41 (3H, s), 3.19 (1H, t, J = 0.8 Hz), 3.27 (1H, s), 3.87 (1H, t, J = 2.8 Hz), 5.25 (1H, t, 2.0 Hz), 6.09 (1H, dd, J = 3.2, 5.6 Hz), 6.22 (1H, dd, J = 3.2, 5.6 Hz), 7.34 (2H, m), 7.44 (2H, m), 7.54 (1H, m), 7.85 (2H, m), 7.98 (2H, m). 13 C-NMR (100 MHz, CDCl 3 ) δ 21.3, 46.2, 47.6, 48.5, 55.3, 77.4, 126.7, 128.3, 128.4, 128.6, 130.1, 130.2, 132.9, 133.6, 133.8, 136.6, 136.8, 138.2, 166.3, IR (neat) 2981, 1716, 1680, 1278, 1120, 1107, 746, 726, 696 cm -1. MS (EI) m/z 105 (M + -C 15 H 15 O 2, 13%), 119 (M + -C 14 H 13 O 2, 100%), 267 (M + -C 5 H 5, 28%), 332 (M +, 3%). HRMS Calcd for C 22 H 20 O 3 : Found: Rhodium-catalyzed isomerization of 3a to trans-3a (Scheme 5) In a two-necked flask equipped with a magnetic stirrer bar were placed RhH(PPh 3 ) 4 (10 mol%, 28.8 mg), dppbz (20 mol%, 22.3 mg), (1R*,2S*,3S*,4S*)-2-benzoyl-3-benzoyloxy-bicyclo[2,2,1]hept-5-ene 3a (0.25 mmol, 79.6 mg) in chlorobenzene (0.5 ml) under an argon atmosphere, and the solution was heated at reflux for 6 h. S8
9 Then, the solvent was removed under reduced pressure, and the residue was purified by flash column chromatography on silica gel giving (1R*,2R*,3R*,4S*)-2-benzoyl-3-benzoyloxy-bicyclo[2,2,1]hept-5-ene trans-3a (27.8mg, 35%): Colorless solid. Mp o C (Hexane/ Ether = 9/ 1). 1 H-NMR (400 MHz, CDCl 3 ) δ 1.56 (1H, dd, J = 2.4, 9.4 Hz), 1.92 (1H, d, J = 9.6 Hz), 3.07 (1H, s), 3.24 (1H, t, J = 2.8 Hz), 3.38 (1H, s), 5.83 (1H, t, J = 3.6 Hz), 6.33 (1H, dd, J = 2.8, 5.6 Hz), 6.57 (1H, dd, J = 3.2, 5.6 Hz), 7.43 (4H, m), 7.54 (2H, m), 7.97 (4H, m). 13 C-NMR (100 MHz, CDCl 3 ) δ 44.6, 45.8, 47.9, 54.3, 78.3, 128.3, 128.4, 128.6, 129.5, 130.1, 132.9, 133.1, 135.1, 136.5, 137.8, 166.3, IR (KBr) 3066, 2980, 1709, 1661, 1449, 1374, 1271, 1225, 1116, 714, 687 cm -1. MS (EI) m/z 105 (M + -C 14 H 13 O 2, 100%), 253 (M + -C 5 H 5, 50%), 318 (M +, 3%). HRMS Calcd for C 21 H 18 O 3 : Found: The structure of trans-3a was determined by NMR studies. trans-3a exhibited NOE between proton adjacent to benzoate group at δ 5.83 and bridged methylene proton at δ 1.92, as well as proton adjacent to benzoyl group at δ 3.24 and double bond at δ δ 1.92 NOE H δ 5.83 H COPh δ 6.57 H H OCOPh δ 3.24 NOE Rhodium-catalyzed addition reaction to 2-benzoyl-bicyclo[2,2,1]hept-2,5-diene (7) and m-toluic acid (Scheme 6) In a two-necked flask equipped with a magnetic stirrer bar were placed RhH(PPh 3 ) 4 (10 mol%, 28.8 mg), dppbz (20 mol%, 22.3 mg), m-toluic acid (0.25 mmol, 34.0 mg), and 2-benzoyl-bicyclo[2,2,1]hept-2,5-diene 7 [1] (0.25 mmol, 49.1 mg) in chlorobenzene (0.5 ml) under an argon atmosphere, and the solution was heated at reflux for 6 h. Then, the solvent was removed under reduced pressure, and the residue was purified by flash column chromatography on silica gel giving (1R*,2R*,3R*,4S*)-2-benzoyl-3-(m-toluoyloxy)-bicyclo[2,2,1]hept-5-ene trans-8 (37.0 mg, 47%): Colorless oil. 1 H-NMR (400 MHz, CDCl 3 ) δ 1.56 (1H, dd, J = 2.0, 8.8 Hz), 1.92 (1H, d, J = 9.2 Hz), 2.38 (3H, s), 3.07 (1H, s), 3.23 (1H, t, J = 2.8 Hz), 3.38 (1H, s), 5,81 (1H, t, J = 3.6 Hz), 6.33 (1H, dd, J = 3.2, 6.0 Hz), 6.58 (1H, dd, J = 3.2, 5.6 Hz), 7.32 (2H, m), 7.40 (2H, t, J = 8.0 Hz), 7.55 (1H, t, J = 7.2 Hz), 7.75 (2H, d, J = 6.8 Hz), 7.98 (2H, m). 13 C-NMR (100 MHz, CDCl 3 ) δ 21.3, 44.6, 45.8, 47.8, 54.3, 78.3, 126.6, 128.2, 128.4, 128.6, 130.0, 133.7, 135.1, 136.5, 137.8, 138.1, 166.5, IR (neat) 2979, 1714, 1678, 1448, 1279, 1200, 1110, 1018, 746, 701, 687cm -1. MS (EI) m/z 105 (M + -C 15 H 15 O 2, 10%) 119 (M + -C 14 H 13 O 2, 100%), 267 (M + -C 5 H 5, 33%), 332 (M +, 7%). HRMS Calcd for C 22 H 20 O 3 : Found: S9
10 Synthesis of (1R*,2S*,3S*,4S*)-2-benzoyloxy-3-(1-phenylmethanol)[2,2,1]hept-5-ene (trans-9, Scheme 7) In a two-necked flask equipped with a magnetic stirrer bar were placed (1R*,2S*,3S*,4S*)-2-benzoyl-3-benzoyloxy-bicyclo[2,2,1]hepte-5-ene 3a (2.02 mmol, mg) in MeOH (40 ml) under an argon atmosphere, and the solution was cooled at -10 C. Sodium tetrahydroborate (4.4 mmol, mg) was added, and the solution was sttired at -10 C for 1 h. Then, saturated sodium hydrocarbonate solution and dichloromethane were added, and the mixture was stirred for 5 min. The organic layer was extracted with dichloromethane and washed with water, then dried with MgSO 4. The organic layer was concentrated under reduced pressure, and the residue was purified by flash column chromatography on silica gel giving (1R*,2S*,3S*,4S*)-2-benzoyloxy-3-(1-phenylmethanol)[2,2,1]hept-5-ene trans-9 (638.8 mg, 98%): Colorless oil. 1 H-NMR (400 MHz, CDCl 3 ) δ 1.77 (1H, dd, J = 1.6, 8.8 Hz), 1.85 (1H, d, J = 8.8 Hz), 2.57 (1H, dt, J = 3.2, 10.0 Hz), 2.95 (1H, m), 3.17 (1H, s), 4.28 (1H, d, J = 10.0 Hz), 4.40 (1H, t, J = 2.0 Hz), 6.24 (1H, dd, J = 3.2, 5.6 Hz), 6.45 (1H, dd, 2.8, 5.6 Hz), 7.12 (1H, tt, J = 1.2, 7.6 Hz), 7.22 (2H, t, J = 7.6 Hz), 7.36 (4H, m), 7.50 (1H, tt, J = 1.2, 7.6 Hz), 7.79 (2H, m). 13 C-NMR (100 MHz, CDCl 3 ) δ 43.1, 47.0, 48.1, 54.6, 77.3, 77.6, 126.7, 128.0, 128.1, 128.5, 129.3, 130.3, 132.6, 134.2, 138.2, 142.9, IR (neat) 3420, 2981, 1718, 1492, 1251, 1276, 1115, 714, 667 cm -1. MS (EI) m/z 105 (M + -C 14 H 15 O 2, 100%), 198 (M + -C 7 H 6 O 2, 20%), 320 (M +, 5%). HRMS Calcd for C 21 H 18 O 3 : Found: References [1] E. Hasegawa, T. Mukai, T. Toda, Nippon Kagaku Kaishi, 1998, S10
11 1 H-NMR (1R*,2S*,3S*,4S*)-2-benzoyl-3-benzoyloxy-bicyclo[2,2,1]hept-5-ene (3a) S11
12 13 C-NMR (1R*,2S*,3S*,4S*)-2-benzoyl-3-benzoyloxy-bicyclo[2,2,1]hept-5-ene (3a) S12
13 1H-NMR (1R*,2S*,3S*,4S*)-2-(p-toluoyl)-3-(p-toluoyloxy)-bicyclo[2,2,1]hept-5-ene (3b) S13
14 13C-NMR (1R*,2S*,3S*,4S*)-2-(p-toluoyl)-3-(p-toluoyloxy)-bicyclo[2,2,1]hept-5-ene (3b) S14
15 1H-NMR (1R*,2S*,3S*,4S*)-2-(p-chlorobenzoyl)-3-(p-chlorobenzoyloxy)-bicyclo[2,2,1]hept-2-ene (3c) S15
16 13C-NMR (1R*,2S*,3S*,4S*)-2-(p-chlorobenzoyl)-3-(p-chlorobenzoyloxy)-bicyclo[2,2,1]hept-2-ene (3c) S16
17 1H-NMR (1R*,2S*,3S*,4S*)-2-(o-toluoyl)-3-(o-toluoyloxy)-bicyclo[2,2,1]hept-5-ene (3d) S17
18 13C-NMR (1R*,2S*,3S*,4S*)-2-(o-toluoyl)-3-(o-toluoyloxy)-bicyclo[2,2,1]hept-5-ene (3d) S18
19 1H-NMR (1R*,2S*,3S*,4S*)-2-(m-anisoyl)-3-(m-anisoyloxy)-bicyclo[2,2,1]hept-5-ene (3e) S19
20 13C-NMR (1R*,2S*,3S*,4S*)-2-(m-anisoyl)-3-(m-anisoyloxy)-bicyclo[2,2,1]hept-5-ene (3e) S20
21 1H-NMR (1R*,2S*,3S*,4S*)-2-(m-toluoyl)-3-(m-toluoyloxy)-bicyclo[2,2,1]hept-5-ene (3f) S21
22 13C-NMR (1R*,2S*,3S*,4S*)-2-(m-toluoyl)-3-(m-toluoyloxy)-bicyclo[2,2,1]hept-5-ene (3f) S22
23 1H-NMR (1R*,2S*,3S*,4S*)-2-(m-trifluorometylphenoyl)-3-(m-trifluoromethylphenoyloxy)-bicyclo[2,2,1]hep t-5-ene (3g) S23
24 13C-NMR (1R*,2S*,3S*,4S*)-2-(m-trifluorometylphenoyl)-3-(m-trifluoromethylphenoyloxy)-bicyclo[2,2,1]hep t-5-ene (3g) S24
25 1H-NMR (1R*,2S*,3S*,4S*)-2-(2-furoyl)-3-(2-furoyloxy)-bicyclo[2,2,1]hept-5-ene (3h) S25
26 13C-NMR (1R*,2S*,3S*,4S*)-2-(2-furoyl)-3-(2-furoyloxy)-bicyclo[2,2,1]hept-5-ene (3h) S26
27 1H-NMR (1R*,2S*,3S*,4S*)-2-(2-thienoyl)-3-(2-thienoyloxy)-bicyclo[2,2,1]hept-5-ene (3i) S27
28 13C-NMR (1R*,2S*,3S*,4S*)-2-(2-thienoyl)-3-(2-thienoyloxy)-bicyclo[2,2,1]hept-5-ene (3i) S28
29 1H-NMR (1R*,2S*,3S*,4S*)-2-picolinoyl-3-picolinoyloxy-bicyclo[2,2,1]hept-5-ene (3j) S29
30 13C-NMR (1R*,2S*,3S*,4S*)-2-picolinoyl-3-picolinoyloxy-bicyclo[2,2,1]hept-5-ene (3j) S30
31 1H-NMR (1R*,2S*,3S*,4S*)-2-nicotinoyl-3-nicotinoyloxy-bicyclo[2,2,1]hept-5-ene (3k) S31
32 13C-NMR (1R*,2S*,3S*,4S*)-2-nicotinoyl-3-nicotinoyloxy-bicyclo[2,2,1]hept-5-ene (3k) S32
33 1H-NMR (1R*,2R*,3R*,4S*)-2-benzoyl-3-benzoyloxy-bicyclo[2,2,1]heptane (4a) S33
34 13C-NMR (1R*,2R*,3R*,4S*)-2-benzoyl-3-benzoyloxy-bicyclo[2,2,1]heptane (4a) S34
35 1H-NMR (1R*,2S*,3S*,4S*)-2-benzoyl-3-benzoyloxy-1,2,3,4-tetrahydro-1,4-methanonaphtalene (5a) S35
36 13C-NMR (1R*,2S*,3S*,4S*)-2-benzoyl-3-benzoyloxy-1,2,3,4-tetrahydro-1,4-methanonaphtalene (5a) S36
37 1H-NMR 5-benzoyl-3a,4,7,7a-tetrahydro-1H-4,7-methanoindene (6a) S37
38 13C-NMR 5-benzoyl-3a,4,7,7a-tetrahydro-1H-4,7-methanoindene (6a) S38
39 1H-NMR 6-benzoyl-3a, 4,7,7a-tetrahydro-1H-4,7-methanoindene (6a ) S39
40 13C-NMR 6-benzoyl-3a, 4,7,7a-tetrahydro-1H-4,7-methanoindene (6a ) S40
41 1H-NMR (1R*,2S*,3S*,4S*)-2-benzoyl-3-(m-toluoyloxy)-bicyclo[2,2,1]hept-5-ene (8) S41
42 13C-NMR (1R*,2S*,3S*,4S*)-2-benzoyl-3-(m-toluoyloxy)-bicyclo[2,2,1]hept-5-ene (8) S42
43 1H-NMR (1R*,2R*,3R*,4S*)-2-benzoyl-3-benzoyloxy-bicyclo[2,2,1]hept-5-ene (trans-3a ) S43
44 13C-NMR (1R*,2R*,3R*,4S*)-2-benzoyl-3-benzoyloxy-bicyclo[2,2,1]hept-5-ene (trans-3a ) S44
45 1H-NMR (1R*,2R*,3R*,4S*)-2-benzoyl-3-(m-toluoyloxy)-bicyclo[2,2,1]hept-5-ene (trans-8 ) S45
46 13C-NMR (1R*,2R*,3R*,4S*)-2-benzoyl-3-(m-toluoyloxy)-bicyclo[2,2,1]hept-5-ene (trans-8 ) S46
47 1H-NMR (1R*,2S*,3S*,4S*)-2-benzoyloxy-3-(1-phenylmethanol)[2,2,1]hept-5-ene (trans-9) S47
48 13C-NMR (1R*,2S*,3S*,4S*)-2-benzoyloxy-3-(1-phenylmethanol)[2,2,1]hept-5-ene (trans-9) S48
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