(3R,4S)-4-methyltetrahydrofuran-3-ol 、 tert-butyl 7-(3-amino-8-chloro-7-cyano-6-isoquinolyl)-8-methyl-2,3-dihydropyrido[2,3-b][1,4]oxazine-1-carboxylate 在
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以85%的产率得到tert-butyl 7-(8-chloro-7-cyano-3-(((((3R,4S)-4-methyltetrahydrofuran-3-yl)oxy)carbonyl)amino)isoquinolin-6-yl)-8-methyl-2,3-dihydro-1H-pyrido[2,3-b][1,4]oxazine-1-carboxylate