N-甲基哌嗪   、                                                                                      
4-chloro-2-(methylthio)-7-(phenylmethyl)-5,6,7,8-tetrahydropyrido[4',3':4,5]thieno[2,3-d]pyrimidine-5-carboxylic acid methyl ester                                                                                                                                                                                              以
                                                                                         
乙醇                                                                                  为溶剂,
                                                                                                                                                    反应 1.0h,
                                                                                                                以25%的产率得到4-(4-methyl-1-piperazinyl)-2-(methylthio)-7-(phenylmethyl)-5,6,7,8-tetrahydropyrido[4',3':4,5]thieno[2,3-d]pyrimidine-5-carboxylic acid methyl ester