反应详情

To a solution of 1-(tert-butoxycarbonyl)-4-(methoxycarbonyl)piperidine-4-carboxylic acid (3.7 g, 13.2 mmol) in DMF (30 mL) were added HATU (6.0 g, 15.8 mmol, 1.2 equiv.), 2-chlorobenzylamine (1.9 mL, 15.8 mmol, 1.2 equiv.) and DIEA (228 μL, 1.31 mmol, 0.1 equiv.). The reaction mixture was stirred for 3 h and purified on RP-HPLC using a mixture of acetonitrile and H2O to give 1-tert-butyl 4-methyl 4-(2-chlorobenzylcarbamoyl)piperidine-1,4-dicarboxylate (2.8 g, 52%). LRMS (M+H+-Boc) m/z 311.0.

1. custompurified on RP-HPLC
2. additiona mixture of acetonitrile and H2O