[CH2:1]([O:8][C:9]([NH:11][C@H:12]([CH2:22][OH:23])[CH2:13][CH2:14][C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH3:24]I>C(#N)C.[Ag]=O>[CH2:1]([O:8][C:9]([NH:11][C@H:12]([CH2:22][O:23][CH3:24])[CH2:13][CH2:14][C:15]([O:17][C:18]([CH3:19])([CH3:20])[CH3:21])=[O:16])=[O:10])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1To a solution of tert-butyl (4S)-4-{[(benzyloxy)carbonyl]amino}-5-hydroxypentanoate (4.0 g, 12.4 mmol) in acetonitrile (80 ml) were added silveroxide (14.3 g, 61.7 mmol) and methyliodide (7.7 ml, 124 mmol), and the mixture was stirred for 19 hours. After removal of the insoluble materials, the solvent was removed in vacuo and the residue was purified with silica gel chromatography to give tert-butyl (4S)-4-{[(benzyloxy)carbonyl]amino}-5-methoxypentanoate (2.98 g, 71%).
불러오는 중…