2,6-Dimethyl-3-methoxycarbonyl-4-(3-nitrophenyl)-1,4-dihydropyridin-5-carbonsaeure-(3-chlorbenzyl)ester 、
乙醇 以
吡啶 为溶剂,
以Analogously to Example 1 heating a solution of 75 mmols of 3'-nitrobenzylideneacetoacetic acid methyl ester and 75 mmols of β-aminocrotonic acid 3-chlorobenzyl ester in 120 ml of pyridine gave 2,6 dimethyl-3-methoxycarbonyl-4-(3'-nitrophenyl)-1,4-dihydropyridine-5-carboxylic acid 3-chlorobenzyl ester of melting point 142° C (from ethanol)的产率得到