异氰酸苯酯 、
methyl 4-cyano-5-[(4S)-2,2-dimethyl-1,3-dioxolan-4-yl]-2,2-dimethyl-7-[(triphenyl-lambda5-phosphanylidene)amino]-3H-oxepine-6-carboxylate 以
乙腈 为溶剂,
反应 4.0h,
生成 5-[(4S)-2,2-dimethyl-1,3-dioxolan-4-yl]-2-methoxy-8,8-dimethyl-4-oxo-3-phenyl-7H-oxepino[2,3-d]pyrimidine-6-carbonitrile