5-Cyano-4-(4-methoxy-phenyl)-2-phenyl-6-thioxo-1,4,5,6-tetrahydro-pyridine-3-carboxylic acid ethyl ester 在
nitrosylsulfuric acid 作用下,
以
溶剂黄146 为溶剂,
反应 1.0h,
以81%的产率得到ethyl 5-cyano-6-[[3-cyano-5-ethoxycarbonyl-4-(4-methoxyphenyl)-6-phenylpyridin-2-yl]disulfanyl]-4-(4-methoxyphenyl)-2-phenylpyridine-3-carboxylate