反应详情

A mixture of (2S,5R)-5-(N-(benzyloxy)-2-nitrophenylsulfonamido)-1-(tert-butoxycarbonyl)piperidine-2-carboxylic acid (8.56 g, 16 mmol), EDCI (3.2 g, 16 mmol), HOBt (2.2 g, 16 mmol), NH4Cl (1.7 g, 32 mmol), and DIPEA (4.0 g, 32 mmol) in dry DMF (40 mL) was stirred at rt overnight. The mixture was diluted with EtOAc (300 mL), and washed with water (3×). The organic layer was dried over Na2SO4 and concentrated to give (2S,5R)-tert-butyl 5-(N-(benzyloxy)-2-nitrophenylsulfonamido)-2-carbamoyl-piperidine-1-carboxylate as yellow solid (7.4 g, 86%). ESI-MS (EI+, m/z): 557 [M+Na]+.

1. washwashed with water (3×)
2. dry with materialThe organic layer was dried over Na2SO4
3. concentrationconcentrated