氯乙酸乙酯 、
4,5-dihydro-5-imino-4,6,7-triphenyl-s-triazolo[3',4':2,3]pyrimido[4,5-c]pyridazine-1(2H)-thione 在
sodium acetate 作用下,
以
乙醇 为溶剂,
反应 4.0h,
以77%的产率得到4,5-dihydro-1-ethoxycarbonylmethylthio-5-imino-4,6,7-triphenyl-s-triazolo[3',4':2,3]pyrimido[4,5-c]pyridazine