2-[1-(3-Nitro-phenyl)-meth-(E)-ylidene]-3-oxo-butyric acid 1-thiophen-2-ylmethyl-piperidin-3-yl ester 、 Carbamimidoyl-acetic acid isopropyl ester; compound with acetic acid 在
sodium methylate 作用下,
以
异丙醇 为溶剂,
以84%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-(1-thiophen-2-ylmethyl-piperidin-3-yl) ester