methyl 1-(3-cyanobenzene)-5,5-difluoro-4-oxopiperidine-3-carboxylate hydrochloride   、                                                                                      
N-(4-methoxybenzyl)-4,5-dihydro-1H-imidazol-2-amine                                                                                                                                                              在
                                                                                                                                                                                 
sodium methylate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                                                        以69 %的产率得到3-((9,9-difluoro-4-(4-methoxybenzyl)-5-oxo-1,2,4,5,8,9-hexahydroimidazo[1,2-a]pyrido[3,4-e]pyrimidin-7(6H)-yl)methyl)benzonitrile