8,8-dimethyl-2-(methylsulfanyl)-5-(4-nitrophenyl)-5,8,9,10-tetrahydropyrimido[4,5-b]quinoline-4,6(3H,7H)-dione 、
碘甲烷 在
sodium ethanolate 作用下,
以
乙醇 为溶剂,
反应 3.0h,
以60%的产率得到3,8,8-trimethyl-2-methylthio-5-(4-nitrophenyl)-5,8,9,10-tetrahydro-pyrimido[4,5-b]quinoline-4,6-dione