Amidinoessigsaeureisopropylester 、
2-[1-(3-Nitro-phenyl)-meth-(Z)-ylidene]-3-oxo-butyric acid 2-(4-o-tolyl-piperazin-1-yl)-ethyl ester 在
sodium 作用下,
以
乙醇 为溶剂,
以69.5%的产率得到2-Amino-6-methyl-4-(3-nitro-phenyl)-1,4-dihydro-pyridine-3,5-dicarboxylic acid 3-isopropyl ester 5-[2-(4-o-tolyl-piperazin-1-yl)-ethyl] ester