4-氯苯甲醛 、
ethyl 3-amino-3-ethoxypropenoate 以
alcohol 为溶剂,
反应 8.0h,
以yields 2-amino-4-(4-chlorophenyl)-6-ethoxy-4,5-dihydropyridine-3,5-dicarboxylic acid diethyl ester of melting point 130°-132°C (ethyl acetate/petroleum ether)的产率得到6-amino-4-(4-chloro-phenyl)-2-ethoxy-3,4-dihydro-pyridine-3,5-dicarboxylic acid diethyl ester