3-氯苯甲醛   、                                                                                      
methyl 3-amino-3-ethoxypropenoate                                                                                                                                                                                              以
                                                                                         
异丙醇                                                                                  为溶剂,
                                                                                                                                                    反应 6.0h,
                                                                                                                以2-amino-4-(3-chlorophenyl)-6-ethoxy-4,5-dihydropyridine-3,5-dicarboxylic acid dimethyl ester of melting point 158° C (isopropanol) is obtained的产率得到6-amino-4-(3-chloro-phenyl)-2-ethoxy-3,4-dihydro-pyridine-3,5-dicarboxylic acid dimethyl ester