4-(hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl)aniline   、                                                                                      4-chloro-6-((4,7-difluoro-2-methyl-1H-indol-5-yl)oxy)pyrimidine-5-carbonitrile                                                                                                                                                              在
                                                                                                                                                                                 
三氟乙酸                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
异丙醇                                                                                  为溶剂,
                                                                                                                                                                                        以56 mg的产率得到4-[4-(3,4,6,7,8,8a-hexahydro-1H-pyrrolo[1,2-a]pyrazin-2-yl)anilino]-6-[(4,7-difluoro-2-methyl-1H-indol-5-yl)oxy]pyrimidine-5-carbonitrile