10-(2,4-dichlorophenyl)-1,3-diethyl-7,7-dimethyl-6,7,8,10-tetrahydropyrimido[5,4-b]quinoline-2,4,9(1H,3H,5H)-trione 以
N,N-二甲基甲酰胺 为溶剂,
以95%的产率得到10-(2,4-dichlorophenyl)-1,3-diethyl-7,7-dimethyl-7,8-dihydropyrimido[5,4-b]quinoline-2,4,9(1H,3H,6H)-trione