ethyl 7-methyl-1-phenyl-4-oxo-2-thioxo-1,2,3,4-tetrahydropyrido<2,3-d>pyrimidine-6-carboxylate 、
N,N-二乙基氯乙胺 在
sodium ethanolate 作用下,
反应 14.0h,
以55%的产率得到2-(2-Diethylamino-ethylsulfanyl)-7-methyl-4-oxo-1-phenyl-1,4-dihydro-pyrido[2,3-d]pyrimidine-6-carboxylic acid ethyl ester