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