3-(2-(diethylamino)-2-oxoethyl)-5-methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid 、
1-(3,4-二氯苯基)哌嗪 在
N,N-二异丙基乙胺 、 N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate 作用下,
以
乙醚 、
4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran 为溶剂,
以50%的产率得到2-(6-(4-(3,4-dichlorophenyl)piperazine-1-carbonyl)-5-methyl-4-oxothieno[2,3-d]pyrimidin-3(4H)-yl)-N,N-diethylacetamide