(R)-4-{7-[3-tert-butoxycarbonylamino-4-(2,4,5-trifluoro-phenyl)-butyryl]-3-trifluoromethyl-5,6,7,8-tetrahydro-imidazo[1,5-a]pyrazine-1-carbonyl)-piperazine-1-carboxylic acid tert-butyl ester 在
盐酸 作用下,
以
甲醇 为溶剂,
以94%的产率得到(R)-3-amino-1-[1-(piperazine-1-carbonyl)-3-trifluoromethyl-5,6-dihydro-8H-imidazo[1,5-a]pyrazin-7-yl]-4-(2,4,5-trifluorophenyl)butan-1-one dihydrochloride