1-methyl-8-[2-(4-trifluoromethyl-phenyl)-ethyl]-5,6-dihydro-8H-imidazo[1,5-a]pyrazine-7-carboxylic acid tert-butyl ester 在
N-溴代丁二酰亚胺(NBS) 作用下,
以
乙腈 为溶剂,
反应 0.75h,
以85%的产率得到3-bromo-1-methyl-8-[2-(4-trifluoromethyl-phenyl)-ethyl]-5,6-dihydro-8H-imidazo[1,5-a]pyrazine-7-carboxylic acid tert-butyl ester