methyl 6-(1-(4-cyanophenylamino)-2-methylpropan-2-ylamino)-5-methyl-3-oxo-4-(3-(trifluoromethyl)phenyl)-3,4-dihydropyrazine-2-carboxylate                                                                                                                                                              在
                                                                                                                                                                                 phosphorus pentoxide                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙腈                                                                                  为溶剂,
                                                                                                                                                    反应 1.5h,
                                                                                                                以54%的产率得到methyl 6-(1-(4-cyanophenyl)-4,4-dimethyl-4,5-dihydro-1H-imidazol-2-yl)-5-methyl-3-oxo-4-(3-(trifluoromethyl)phenyl)-3,4-dihydropyrazine-2-carboxylate