反应详情

To a mixture of tert-butyl 4-hydroxypiperidine-1-carboxylate (0.30 g, 0.0015 mol) (Aldrich Cat. #495484) and triethylamine (0.31 mL, 0.0022 mol) in methylene chloride (2 mL) was added p-nitrophenyl chloroformate (0.33 g, 0.0016 mol) (Acros Organics, Cat. #17080). The mixture was stirred at r.t. for 2 h. After removal of the solvent under reduced pressure, the residue was purified by flash chromatography on a silica gel with ethyl acetate in hexanes (0-20%) to afford the desired product (0.32 g, 58%). Analytic LCMS (M+Na)+: m/z=389.0.

1. customAfter removal of the solvent under reduced pressure
2. customthe residue was purified by flash chromatography on a silica gel with ethyl acetate in hexanes (0-20%)