tert-Butyl [(1R)-1-{[(cyclohexylmethyl)amino]carbonyl)-3-(methylthio)propyl]carbamate → HCID 86603752、化合物
反応式
[CH:1]1([CH2:7][NH:8][C:9]([C@H:11]([NH:16][C:17](=[O:23])[O:18][C:19]([CH3:22])([CH3:21])[CH3:20])[CH2:12][CH2:13]SC)=[O:10])[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1>CI>[CH:1]1([CH2:7][N:8]2[CH2:13][CH2:12][C@@H:11]([NH:16][C:17](=[O:23])[O:18][C:19]([CH3:22])([CH3:21])[CH3:20])[C:9]2=[O:10])[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1参加物
3
実験手順
tert-Butyl [(1R)-1-{[(cyclohexylmethyl)amino]carbonyl}-3-(methylthio)propyl]carbamate (5.12 g) was dissolved in methyl iodide (23 mL) and stirred at room temperature for 18 hours. The excess methyl iodide was evaporated in vacuo. The residue was dissolved in tetrahydrofuran (50 mL), added lithium bis(trimethylsilyl)amide 1.0M solution in hexane (16.3 mL) at o 0° C., and then allowed to warm to room temperature and stirred for 5 hours. The resulting mixture was poured into aqueous ammonium chloride and extracted with ethyl acetate. The organic phase was washed with brine, dried over MgSO4, concentrated in vacuo. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=from 80/20 (v/v) to 60/40 (v/v)) to give tert-butyl [(3R)-1-(cyclohexylmethyl)-2-oxo-3-pyrrolidinyl]carbamate (2.0 g) as a pale yellow solid.