反应详情

温度

0 °C

Intermediate 5 (980 mg, 3.31 mmol) was dissolved in DCM (50 mol) and added TEA (0.45 ml, 3.31 mmol). Reaction mixture cooled to 0° C., isopropylchloro formate (2.7 ml, 6.62 mmol) was added and stirred the reaction mixture for 3 h at rt. Work up (DCM/H2O) followed by column purification on 60-120 mesh silica gel using EtOAc and Petether (15:85) as eluent afforded the titled compound (500 mg) as a pale-red solid.

1. customReaction mixture
2. customfollowed by column purification on 60-120 mesh silica gel