Trifluoroacetic acid → Pyrrolidine-2-carboxylic acid (2-benzyloxy-5-oxo-tetrahydro-furan-3-yl)-amide
反応式
C(OC([N:8]1[CH2:12][CH2:11][CH2:10][CH:9]1[C:13](=[O:29])[NH:14][CH:15]1[CH2:19][C:18](=[O:20])[O:17][CH:16]1[O:21][CH2:22][C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1)=O)(C)(C)C.C(O)(C(F)(F)F)=O>C(Cl)Cl>[CH2:22]([O:21][CH:16]1[CH:15]([NH:14][C:13]([CH:9]2[CH2:10][CH2:11][CH2:12][NH:8]2)=[O:29])[CH2:19][C:18](=[O:20])[O:17]1)[C:23]1[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=1参加物
4
実験手順
A solution of 118 (405 mg, 1.0 mmol) was treated with TFA (2 mL) in CH2Cl2 (2 mL) for one hour. The reaction solution was evaporated in vacuo and azeotrapped with CH2Cl2 four times to give pyrrolidine-2-carboxylic acid (2-benzyloxy-5-oxo-tetrahydro-furan-3-yl)-amide as a pale yellow solid. 1H-NMR (500 MHz, CDCl3): δ 1.87-2.15 (m, 4H), 2.30-2.70 (m, 2H), 2.80-3.08 (m, H), 3.45 (br, 2H), 4.35-4.98 (m, 3H), 5.30-5.56 (m, H), 7.10-7.60 (m, 5H); Analytical HPLC: 7.78/8.20 min.; LC-MS: m/e=305 (M+H+).