2-(4-bromobutoxy)-5-methylsulfonylbenzaldehyde   、                                                                                      
β-氨基巴豆酸甲酯   、                                                                                      
乙酰乙酸甲酯                                                                                                                                                              在
                                                                                                                                                                                 
甲醇                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
异丙醇                                                                                  为溶剂,
                                                                                                                                                    反应 5.0h,
                                                                                                                以to give 6.3 g of dimethyl 4-[2(4-bromobutoxy)-5-methylsulfonylphenyl]-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate的产率得到dimethyl 4-[2(4-bromobutoxy)-5-methylsulfonylphenyl]-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate