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