4-{8-[4-(4-methyl-piperazin-1-yl)-phenylamino]-[1,2,4]triazolo[1,5-a]pyrazin-5-yl}-thiophene-2-carboxylic acid amide 、
5,8-二溴-[1,2,4]噻唑并[1,5-a]吡嗪 、
tert-butyl 4-(4-aminophenyl)-3-oxopiperazine-1-carboxylate 、
N,N-二异丙基乙胺 在
crude material 、 silica gel 、
二氯甲烷 、
甲醇 作用下,
以
异丙醇 为溶剂,
以MeOH affords 4-[4-(5-bromo-[1,2,4]triazolo[1,5-a]pyrazin-8-ylamino)-phenyl]-3-oxo-piperazine-1-carboxylic acid tert-butyl ester as a white solid (0.252 g, 51%)的产率得到4-[4-(5-bromo-[1,2,4]triazolo[1,5-a]pyrazin-8-ylamino)-phenyl]-3-oxo-piperazine-1-carboxylic acid tert-butyl ester