3-cyclopropyl-8-[2-(4-difluoromethoxy-phenyl)-ethyl]-5,6-dihydro-8H-imidazo[1,5-a]pyrazine-7-carboxylic acid tert-butyl ester 、
methanol-dichloromethane 反应 5.0h,
以afforded 1-chloro-3-cyclopropyl-8-[2-(4-difluoromethoxy-phenyl)-ethyl]-5,6-dihydro-8H-imidazo[1,5-a]pyrazine-7-carboxylic acid tert-butyl ester as a yellow oil (451 mg; 50%)的产率得到1-chloro-3-cyclopropyl-8-[2-(4-difluoromethoxy-phenyl)-ethyl]-5,6-dihydro-8H-imidazo[1,5-a]pyrazine-7-carboxylic acid tert-butyl ester