4-(8-Dimethylamino-7-ethyl-5-methyl-6-oxo-5,6,7,8-tetrahydro-pteridin-2-ylamino)-3-methoxy-benzoic acid   、                                                                                      
(1-乙基-4-哌啶基)甲胺                                                                                                                                                              在
                                                                                                                                                                                 
N,N-二异丙基乙胺   、                                                                                                  
Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-)                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 1.0h,
                                                                                                                以44%的产率得到4-(8-Dimethylamino-7-ethyl-5-methyl-6-oxo-5,6,7,8-tetrahydro-pteridin-2-ylamino)-N-(1-ethyl-piperidin-4-ylmethyl)-3-methoxy-benzamide