3,4-二甲氧基苄胺   、                                                                                      4-(4-Chloro-5-chloro-6-methyl-thieno-[2,3-d]-pyrimidin-2-yl)-benzoic acid methylester                                                                                                                                                                                                                                                                                                          以yields 4-[4-(3,4-dimethoxybenzylamino)-5-chloro-6-methyl-thieno-[2,3-d]-pyrimidin-2-yl]-benzoic acid methylester的产率得到methyl 4-[4-(3,4-dimethoxybenzylamino)-5-chloro-6-methyl-thieno-[2,3-d]-pyrimidin-2-yl]-benzoate