9-amino-(9-deoxy)cinchona alkaloids-derived novel chiral phase-transfer catalysts
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- Ζωή Γλυκύς
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1 Electronic Supplementary Material (ESI) for Organic & Biomolecular Chemistry. This journal is The Royal Society of Chemistry amino-(9-deoxy)cinchona alkaloids-derived novel chiral phase-transfer catalysts Wenwen Peng, a Jun Cao, a Jingwei Wan, a Xuebing Ma* a and Bing Xie,* b College of Chemistry and Chemical Engineering, Southwest University, Chongqing, , P. R. China 1. NMR spectra H and 13 C NMR spectra of 2a-d
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4 1.2 1H and 13C NMR spectra of 3a1-d1 and 3a2-d2
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9 1.3 1H and 13C NMR spectra of catalysts a1-d1 and a2-d2
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14 2. High resolution mass spectroscopy (HRMS)
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16 3. Synthesis of N-benzyl ammoniumsalts b 1 ' and b 2 ' The first conversion of cinchonidine (CD) to 9-epimers of cinchona alkaloids (epi-cd) was achieved by one-pot inversion of Mitsunobu esterification saponification ( Ł. Sidorowicz, J. Skarżewski, Synthesis, 2011, 5, ). The anhydrous THF solution (4 ml) containing CD (0.20 g, 0.68 mmol) and 3, 5-bis(trifluoromethyl)benzyl bromide (0.21 g, 0.68 mmol) or 4- trifluoromethyl benzyl bromide (0.16 g, 0.68 mmol) was stirred at 65 ºC for 5 h. During this process, white solid gradually separate out. The white precipitate was filtered, washed with THF (3 ml 2) and dried under reduced pressure to afford pure b1' and b2', respectively in 79% and 88% yields.
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18 4. The optimization of catalytic conditions The catalytic reaction conditions such as solvents, temperature, species and concentrations of base and used amounts of catalyst were carefully optimized and shown in Table 1- Table 1 The influence of various solvents on the catalytic performances a Entry Solvent Yield [%] b %ee c 1 CH 2 Cl t-buoch (R) 3 CH 3 OH acetone 90 5(R) 5 toluene (R) 6 EAc (R) 7 CH 3 CN (R) 8 DMF 99-9 CHCl DMSO ether (R) a Reaction conditions: b 2, S=0.1 mmol, S/C=10, -20, 12 h, Solvent: 2 ml, KOH: 50% aq 0.4mL. b Isolated yield. c Determined by charil HPLC. Table 2 The influence of reaction temperature on catalytic performances a Entry Temp.[ ] Time Yield [%] b %ee c (R) (R) (R) (R) (R) a Reaction conditions: b 2, S=0.1 mmol, S/C=10, ether: 2 ml, KOH: 50% aq 0.4 ml b Isolated yield. c Determined by charil HPLC.
19 Table 3 The influence of various base on catalytic performances a Entry Base Yield [%] b %ee c 1 LiOH (R) 2 NaOH (R) 3 KOH (R) 4 CsOH (R) a Reaction conditions: b 2, S=0.1 mmol, S/C=10, -40, 12 h, ether: 2 ml, MOH: 50% aq 0.4 ml (LiOH:11%). b Isolated yield. c Determined by charil HPLC. Table 4 The influence of concentration of the base on catalytic performances a Entry Wt (%) Base Yield [%] b %ee c 1 10 KOH (R) 2 20 KOH (R) 3 30 KOH (R) 4 40 KOH (R) 5 50 KOH (R) a Reaction conditions: b 2, S=0.1 mmol, S/C=10, -40, 12 h, ether: 2 ml. KOH: 0.4 ml b Isolated yield. c Determined by charil HPLC. Table 5 The influence of loading amount on catalytic performances a Entry S/C Cat. (mol%) Yield [%] b %ee c (R) (R) (R) (R) (R) a Reaction conditions: b 2, S=0.1 mmol, -40, 12 h, ether: 2 ml, KOH: 50% aq. 0.4 ml. b Isolated yield. c Determined by charil HPLC. 5. The data of catalytic products 1 H NMR (300 MHz, CDCl 3, TMS): δ 7.52 (d, 2 H, 3 J=7.0 Hz, Ph-H), (m, 11 H, Ph-H), 6.54 (d, 2H, 3 J=6.4 Hz, Ph-H), 4.06 (dd, 1 H, 3 J = 4.4 Hz, 4.4 Hz, CH), (m,
20 2 H, CH 2 ), 1.39 (s, 9 H, CH 3 ). 13 C NMR (75 MHz, CDCl 3, TMS): δ 170.8, (C=N, C=O), 139.5, 138.3, 137.5, 136.3, 132.4, 130.0, 129.8, 129.3, 128.6, 128.4, 128.2, 128.1, 128.0, 128.0, 127.9, 127.6, 126.6, 126.1, 81.1 (O-C), 67.9 (CH), 39.5 (CH2), 28.0 (CH 3 ). Rt HPLC (Daicel Chiralpak OD-H, 95:5, hexane/dioxane, 254 nm, 0.5 ml/min), 10.0 min (R-isomer), 11.9min (S-isomer).
21 1 H NMR (300 MHz, CDCl 3, TMS): δ 7.54 (d, 2 H, 3 J = 7.1 Hz, Ph-H), 7.40 (d, 2 H, 3 J = 7.9 Hz, Ph-H), (m, 6 H, Ph-H), 7.13 (d, 2 H, 3 J = 7.9 Hz, Ph-H), 6.58 (d, 2 H, 3 J = 6.4 Hz, Ph-H), 4.10 (dd, 1 H, 3 J = 4.4 Hz, 4.4 Hz, CH), (m, 2 H, CH 2 ), 1.41 (s, 9 H, CH 3 ). 13 C NMR (75 MHz, CDCl 3, TMS): δ 170.7, (C=N, C=O), (q, 3 J C-F = 1.3 Hz), 139.2, 137.5, 136.0, 132.4, 130.3, 130.1, 130.0, 130.0, 129.7, 128.6, 128.3, 128,2, 128.1, 128.0, 127.4, 126.0, (q, 2 J C-F = 3.8 Hz), (q, 1 J C-F = 3.8 Hz, CF 3 ), 81.4 (O-C), 67.4 (CH), 39.2 (CH 2 ), 27.9 (CH 3 ). Rt HPLC (Daicel Chiralpak OD-H, 95:5, hexane/dioxane, 254 nm, 0.5 ml/min), 9.6 min (S -isomer), 11.1min (R -isomer).
22 1 H NMR (300 MHz, CDCl 3, TMS): δ 7.76 (d, 1 H, 3 J=7.1 Hz, Ph-H), (m, 4 H, Ph-H), (m, 7 H, Ph-H), 6.43 (d, 2 H, 3 J = 6.4 Hz, Ph-H), 4.13 (dd, 1 H, 3 J=3.5 Hz, 3.5 Hz, CH), (m, 2 H, CH 2 ), 1.39 (s, 9 H, CH 3 ). 13 C NMR (75 MHz, CDCl 3, TMS): δ 170.7, (C=N, C=O), 139.2, (q, 2 J C-F = 1.6 Hz), 136.0, 133.3, 132.4, 131.1, 130.2, 131.0, 129.6, 128.7, 128.2, 128,1, 127.9, 127.9, 127.3, 126.3, (Ph), (q, 1 J C-F = 5.7 Hz, CF 3 ), 81.2 (O-C), 66.5 (CH), 36.0 (CH 2 ), 27.9 (CH 3 ). Rt HPLC (Phenomenex Lux 5u Amylose-2, 95:5, hexane/dioxane, 254 nm, 0.5 ml/min), 10.8 min (R-isomer), 13.5min (S-isomer).
23 1 H NMR (300 MHz, CDCl 3, TMS): δ (m, 15 H, Ar-H), 6.50 (d, 2 H, 3 J = 6.4 Hz), 4.23 (dd, 1 H, 3 J = 4.4 Hz, 4.4 Hz, CH), (m, 2 H, CH 2 ), 1.43 (s, 9 H, CH 3 ). Rt HPLC (Daicel Chiralpak OD-H, 95:5, hexane/dioxane, 254 nm, 0.5 ml/min), 12.0 min (S -isomer), 13.2 min (R -isomer).
24 1 H NMR (300 MHz, CDCl 3, TMS): δ 7.64 (d, 2 H, 3 J = 6.9 Hz, Ph-H), (m, 3 H, Ph-H), (m, 3 H, Ph-H), (m, 2 H, Ph-H), (m, 1 H, -CH=), (m, 2 H, =CH 2 ), 4.02 (dd, 1 H, 3 J = 5.6 Hz, 5.6 Hz, CH), (m, 2 H, CH 2 ), 1.45 (s, 9 H, CH 3 ). Rt HPLC (Phenomenex Lux 5u Amylose-2, 95:5, hexane/dioxane, 254 nm, 0.5 ml/min), 11.6 min (R-isomer), 13.4 min (S-isomer).
25 1 H NMR (300 MHz, CDCl 3, TMS): δ 7.64 (d, 2 H, 3 J = 6.8 Hz, Ph-H), (m, 6 H, Ph-H), (m, 2 H, Ph-H), 4.75 (d, 2 H, 3 J = 6.6 Hz, =CH 2 ), 4.09 (dd, 1 H, 3 J = 5.4 Hz, 5.3 Hz, CH), (m, 2 H, CH 2 ), 1.52 (s, 3 H, CH 3 ), 1.46 (s, 9 H, CH 3 ). Rt HPLC (Phenomenex Lux 5u Amylose-2, 95:5, hexane/dioxane, 254 nm, 0.5 ml/min), 10.7 min (R-isomer), 12.6 min (S-isomer).
26 1 H NMR (300 MHz, CDCl 3, TMS): δ 7.53 (d, 2 H, 3 J = 6.9 Hz, Ph-H), (m, 6 H, Ph-H), (m, 4 H, Ph-H), 6.62 (d, 2 H, 3 J = 6.5 Hz), 4.04 (dd, 1 H, 3 J = 4.6 Hz, 4.7 Hz, CH), (m, 2 H, CH 2 ), 1.40 (s, 9 H, CH 3 ). 13 C NMR (75 MHz, CDCl 3, TMS): δ 170.6, (C=N, C=O), 163.1, 160.0, 139.3, 134.0, 132.4, (d, 2 J C-F = 7.8 Hz, F), 131.1, 130.9, 130.2, 130.0, 128.6, 128.3, 128.2, 128.1, 128,0, (Ph), 114.7, (d, 1 J C-F = 20.9 Hz, F), 81.2 (O-C), 67.7 (CH), 38.7 (CH 2 ), 28.0 (CH 3 ). Rt HPLC (Phenomenex Lux 5u Amylose-2, 95:5, hexane/dioxane, 254 nm, 0.5 ml/min), 10.3 min (R-isomer), 12.5 min (S-isomer).
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28 1 H NMR (300 MHz, CDCl 3, TMS): δ 7.52 (d, 2 H, 3 J = 7.0 Hz, Ph-H), (m, 10 H, Ph-H), 6.57 (d, 2 H, 3 J = 6.6 Hz, Ph-H), 4.09 (dd, 1 H, 3 J = 5.6 Hz, 5.6 Hz, CH), (m, 2 H, CH 2 ), 1.41 (s, 9 H, CH 3 ). 13 C NMR (75 MHz, CDCl 3, TMS): δ 170.8, (C=N, C=O), 139.3, 139.2, 136.1, 133.4, 133.4, 132.4, 130.5, 130.2, 130.1, 130.0, 128.6, 128.4, 128.3, 128.2, 128,1, 127.9, 127.4, (q, 2 J C-F = 3.7 Hz, CF 3 ), (Ph), (q, 1 J C-F = 3.8 Hz, CF 3 ), 81.4 (O-C), 67.3 (CH), 39.2 (CH 2 ), 27.9 (CH 3 ). Rt HPLC (Daicel Chiralpak OD-H, 95:5, hexane/dioxane, 254 nm, 0.5 ml/min), 9.4 min (R -isomer), 10.9 min (S -isomer).
29 1 H NMR (300 MHz, CDCl 3, TMS): δ 7.60 (d, 2 H, 3 J = 7.2 Hz, Ph-H), (m, 6 H, Ph-H), (m, 4 H, Ph-H), 6.52 (d, 2 H, 3 J = 4.1 Hz, Ph-H), 4.15 (dd, 1 H, 3 J = 3.9 Hz, 3.9 Hz, CH), (m, 2 H, CH 2 ), 2.06 (s, 3 H, Ph-CH 3 ), 1.39 (s, 9 H, CH 3 ). 13 C NMR (75 MHz, CDCl 3, TMS): δ 171.0, (C=N, C=O), 139.3, 136.9, 136.3, 136.2, 132.4, 131.0, 130.0, 130.0, 129.9, 128.7, 128.2, 128.1, 127.9, 127.8, 127.6, 126.3, 125.9, (C-Ph), 81.0 (O-C), 66.4 (CH), 36.7 (CH 2 ), 28.0 (CH 3 ), 19.2 (Ph-CH 3 ). Rt HPLC (Phenomenex Lux 5u Amylose-2, 95:5, hexane/dioxane, 254 nm, 0.5 ml/min), 10.1 min (R-isomer), 12.3 min (S-isomer).
30 1 H NMR (300 MHz, CDCl 3, TMS): δ 7.81 (d, 1 H, 3 J = 7.2 Hz, Ph-H), (m, 4 H, Ph-H), (m, 7 H, Ph-H), 6.59 (d, 2 H, 3 J = 6.5 Hz, Ph-H), 4.09 (dd, 1 H, 3 J = 4.5 Hz, 4.3 Hz, CH), (m, 2 H, CH 2 ), 2.22 (s, 3 H, Ph-CH 3 ), 1.45 (s, 9 H, CH 3 ). 13 C NMR (75 MHz, CDCl 3, TMS): δ 170.8, (C=N, C=O), 139.5, 138.1, 137.4, 136.3, 132.4, 132.3, 130.6, 130.0, 130.0, 128.6, 128.2, 128.2, 128.1, 127.9, 127.8, 127.7, 126.8, (C-Ph), 81.0 (O-C), 67.8 (CH), 39.4 (CH 2 ), 28.0 (CH 3 ), 21.1 (Ph-CH 3 ). Rt HPLC (Phenomenex Lux 5u Amylose-2, 95:5, hexane/dioxane, 254 nm, 0.5 ml/min), 10.0 min (R-isomer), 12.3 min (S-isomer).
31 1 H NMR (300 MHz, CDCl 3, TMS): δ 7.81 (d, 1 H, 3 J = 7.2 Hz, Ph-H), 7.58 (d, 2H, 3 J = 7.1 Hz, Ph-H), (m, 6 H, Ph-H), 6.96 (q, 4 H, 3 J = 7.9 Hz, Ph-H), 6.62 (d, 2 H, 3 J = 6.6 Hz, Ph-H), 4.09 (dd, 1 H, 3 J=4.4 Hz, 4.4 Hz, CH), (m, 2 H, CH 2 ), 2.28 (s, 3 H, Ph-CH 3 ), 1.44 (s, 9 H, CH 3 ). 13 C NMR (75 MHz, CDCl 3, TMS): δ 170.9, (C=N, C=O), 139.5, 137.5, 136.3, 135.5, 135.1, 132.4, 130.0, 129.6, 128.7, 128.2, 128.1, 128.0, 127.9, (C-Ph), 81.0 (O-C), 68.0 (CH), 39.1 (CH 2 ), 28.0 (CH 3 ), 21.0 (Ph-CH 3 ). Rt HPLC (Phenomenex Lux 5u Amylose-2, 95:5, hexane/dioxane, 254 nm, 0.5 ml/min), 10.7 min (R-isomer), 13.1 min (S-isomer).
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33 1 H NMR (300 MHz, CDCl 3, TMS): δ 7.56 (d, 2 H, 3 J = 7.1 Hz, Ph-H), (m, 6 H, Ph-H), (m, 2 H, Ph-H), (m, 2 H, Ph-H), 6.66 (d, 2 H, 3 J = 6.6 Hz, Ph-H), 4.19 (dd, 1 H, 3 J=4.4 Hz, 4.4 Hz, CH), (m, 2 H, CH 2 ), 1.44 (s, 9 H, CH 3 ). 13 C NMR (75 MHz, CDCl 3, TMS): δ 170.6, (C=N, C=O), 162.9, 159.7, 139.4, 136.1, 132.3, 130.1, 130.0, 128.7, 128.2, 128.2, 128.0, 128.0, 127.9, 127.9, (C-Ph), (d, 3 J C-F = 15.5 Hz, F), (d, 2 J C-F = 3.5 Hz, F), (d, 1 J C-F = 21.9 Hz, F), 81.2 (O-C), 66.0 (CH), 32.6 (CH 2 ), 27.9 (CH 3 ). Rt HPLC (Phenomenex Lux 5u Amylose-2, 95:5, hexane/dioxane, 254 nm, 0.5 ml/min), 11.0 min (R-isomer), 13.7 min (S-isomer).
34 1 H NMR (300 MHz, CDCl 3, TMS): δ 7.49 (d, 2 H, 3 J = 6.7 Hz, Ph-H), (m, 7 H, Ph-H), 7.08 (q, 1 H, 3 J = 6.6 Hz, Ph-H), (m, 4 H, Ph-H), 6.66 (d, 2 H, 3 J = 6.6 Hz, Ph-H), 4.04 (dd, 1 H, 3 J = 3.8 Hz, 3.8 Hz, CH), (m, 2 H, CH 2 ), 1.37 (s, 9 H, CH 3 ). 13 C NMR (75 MHz, CDCl 3, TMS): δ 170.5, (C=N, C=O), 164.2, 160.9, (d, 3 J C-F = 7.4 Hz, F), 139.3, 136.2, 132.3, 130.1, 130.0, 128.6, 128.3, 128.2, 128.1, 127.9, 127.5, 125.5, (C-Ph), (d, 2 J C-F = 20.9 Hz, F), (d, 1 J C-F = 20.9 Hz, F), 81.2 (O-C), 67.4 (CH), 39.2 (CH 2 ), 27.9 (CH 3 ). Rt HPLC (Phenomenex Lux 5u Amylose-2, 95:5, hexane/dioxane, 254 nm, 0.5 ml/min), 9.8 min (R-isomer), 12.1 min (S-isomer).
35 1 H NMR (300 MHz, CDCl 3, TMS): δ 7.57 (d, 2 H, 3 J = 7.0 Hz, Ph-H), (m, 6 H, Ph-H), (m, 5 H, Ph-H), 4.10 (dd, 1 H, 3 J = 4.7 Hz, 4.7 Hz, CH), (m, 2 H, CH 2 ), 1.44 (s, 9 H, CH 3 ). 13 C NMR (75 MHz, CDCl 3, TMS): δ 170.7, (C=N, C=O), (d, 3 J C-F = 12.5 Hz, F), (d, 3 J C-F = 12.5 Hz, F), 139.2, 136.1, (dd, 1 J C-F = 5.7 Hz, F, 2 J C-F = 3.9 Hz, F), 132.3, 130.3, 130.0, 128.6, 128.4, 128.2, 128.1, 127.9, 127.5, (dd, 1 J C-F = 6.0 Hz, F, 2 J C-F = 3.6 Hz, F), (d, 2 J C-F = 16.8 Hz, F), (d, 2 J C-F = 16.8 Hz, F), (C-Ph), 81.4 (O-C), 67.3 (CH), 38.7 (CH 2 ), 27.9 (CH 3 ). Rt HPLC (Phenomenex Lux 5u Amylose-2, 95:5, hexane/dioxane, 254 nm, 0.5 ml/min), 10.3 min (R-isomer), 12.3 min (S-isomer).
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SUPPLEMENTARY INFORMATION
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