(6-oxo-4-[(pyridin-4-ylmethylene)amino]-1,6-dihydropyrimidin-2-ylsulfanyl)phenylazoacetic acid ethyl ester 、
碘甲烷 在
potassium hydroxide 作用下,
以
乙醇 为溶剂,
反应 6.5h,
以68%的产率得到(1-methyl-6-oxo-4-[(pyridin-4-ylmethylene)amino]-1,6-dihydropyrimidin-2-ylsulfanyl)phenylazoacetic acid ethyl ester