2,6-Dimethyl-3-ethoxycarbonyl-4-(2-cyanophenyl)-1,4-dihydropyridin-5-carbonsaeure-benzylester 以
乙醇 为溶剂,
以Analogously to Example 1 heating a solution of 75 mmols of 2'-cyanobenzylideneacetoacetic acid ethyl ester and 75 mmols of β-aminocrotonic acid benzyl ester in 120 ml of ethanol gave 2,6-dimethyl-3-ethoxycarbonyl-4-(2'-cyanophenyl)-1,4-dihydropyridine-5-carboxylic acid benzyl ester of melting point 136° C (from ethanol)的产率得到