benzyl (2S)-2-(cyanomethyl)-4-[2-methylsulfinyl-7-(1-naphthyl)-6,8-dihydro-5H-pyrido[3,4-d]pyrimidin-4-yl]piperazine-1-carboxylate 、
tert-butyl N-[(1-hydroxycyclobutyl)methyl]carbamate 在
sodium t-butanolate 作用下,
以
甲苯 为溶剂,
反应 0.25h,
以90%的产率得到benzyl (2S)-4-[2-[1-[(tert-butoxycarbonylamino)methyl]cyclobutoxy]-7-(1-naphthyl)-6,8-dihydro-5H-pyrido[3,4-d]pyrimidin-4-yl]-2-(cyanomethyl)piperazine-1-carboxylate