4-吡啶甲醛 、
3-amino-3-(ethylthio)-2-propenoic acid ethyl ester 以
乙醇 为溶剂,
反应 5.0h,
以2-amino-4-(4-pyridyl)-6-ethylmercapto-4,5-dihydropyridine-3,5-dicarboxylic acid diethyl ester of melting point 156° C is obtained的产率得到6-amino-2-ethylsulfanyl-3,4-dihydro-[4,4']bipyridinyl-3,5-dicarboxylic acid diethyl ester