3-[4-(3,5-dichloro-pyridin-4-yl-methyl)-7-methoxy-phthalazin-1-yl]-phenylamine   、                                                                                      
methyl 4-(chlorosulfonyl)butanoate                                                                                                                                                              在
                                                                                                                                                                                 
三乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         DMF (N,N-dimethyl-formamide)                                                                                  为溶剂,
                                                                                                                                                    反应 48.0h,
                                                                                                                以15%的产率得到4-{3-[4-(3,5-dichloro-pyridin-4-yl-methyl)-7-methoxy-phthalazin-1-yl]-phenylsulfamoyl}-butyric acid methyl ester