potassium ethyl xanthogenate 、
2-(4-amino-5-cyano-6-methylsulfanyl-pyrimidin-2-yl)-1,1-dimethyl-3-phenyl-isothiourea 以
正丁醇 为溶剂,
反应 2.0h,
以74.2%的产率得到1,1-Dimethyl-2-(4-methylsulfanyl-5,7-dithioxo-5,6,7,8-tetrahydro-pyrimido[4,5-d]pyrimidin-2-yl)-3-phenyl-isothiourea