2,6-Dimethyl-3-methoxycarbonyl-4-(3-nitrophenyl)-1,4-dihydropyridin-5-carbonsaeure-(3,4-dichlorbenzyl)ester 以
乙醇 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 3,4-dichlorobenzyl ester in 120 ml of ethanol gave 2,6-dimethyl-3-methoxycarbonyl-4-(3'-nitrophenyl)-1,4-dihydropyridine-5-carboxylic acid 3,4-dichlorobenzyl ester of melting point 149° C (from ethanol)的产率得到