反应详情

Benzyl chloroformate (33.4 mL, 234 mmol) was added to a solution of [(1R*,6R*)-8-benzyl-8-azabicyclo[4.3.0]nonan-1-yl]carboxylic acid methyl ester (21.3 g, 77.9 mmol) in dichloromethane (259 mL) in a nitrogen atmosphere, and the mixture was stirred at room temperature for 15 hours. The reaction solution was concentrated under reduced pressure. Then, the residue (58.0 g) was purified by silica gel column chromatography (hexane:ethyl acetate=100:0→95:5→90:10→80:20→75:25) to give 17.5 g of the title compound.

1. concentrationThe reaction solution was concentrated under reduced pressure
2. customThen, the residue (58.0 g) was purified by silica gel column chromatography (hexane:ethyl acetate=100:0→95:5→90:10→80:20→75:25)