Sodium borohydride → rac-tert-Butyl ((1-benzyl-3-methyl-1,2,5,6-tetrahydropyridin-2-yl)methyl)carbamate
反応式
[Br-].[CH2:2]([N+:9]1[CH:14]=[CH:13][CH:12]=[C:11]([CH3:15])[C:10]=1[CH2:16][NH:17][C:18]([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19])[C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.[BH4-].[Na+]>CO>[CH2:2]([N:9]1[CH2:14][CH2:13][CH:12]=[C:11]([CH3:15])[CH:10]1[CH2:16][NH:17][C:18](=[O:19])[O:20][C:21]([CH3:24])([CH3:23])[CH3:22])[C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1参加物
4
実験手順
To a solution of 1-benzyl-2-(((tert-butoxycarbonyl)amino)methyl)-3-methylpyridin-1-ium bromide (10.9 g, 35 mmol) in MeOH (500 ml) was added NaBH4 (3.95 g, 104 mmol) in three portions at 0° C. The solution was then stirred for 3 h at rt and then concentrated in vacuo. The crude residue was taken up in EtOAc and washed with sat aq. NaHCO3, dried (MgSO4), and concentrated. The crude residue was purified by chromatography on silica gel (EtOAc/hexanes) to give the title compound as a pale yellow oil (6.67, 61%). MS (ESI) 317 (M+H).