重氮甲烷 、
diphenylmethyl 7-acetoxymethyl-9-chloro-5-cyano-8,11-dioxo-10-hydroxy-13-methyl-1,2,3,4,5,7,8,11,12,12a-decahydro-1,4-iminoazepino<1,2-b>isoquinoline-2-carboxylate 以
甲醇 为溶剂,
以80.8%的产率得到diphenylmethyl 7-acetoxymethyl-9-chloro-5-cyano-8,11-dioxo-10-methoxy-13-methyl-1,2,3,4,5,7,8,11,12,12a-decahydro-1,4-iminoazepino<1,2-b>isoquinoline-2-carboxylate