反应详情

By substituting methylthiomethyl chloride for the dimethylaminopropyl chloride in the procedure of Example 4 and substituting the 2-methyl-4H-pyrazolo[1,5-a]pyrazolo[4',3':5,6]pyrido[3,4-e]pyrimidin-5(8H)-one obtained in Example 8 for the 8-ethyl-2-methyl-4H-pyrazolo[1,5-a]pyrazolo[4',3':5,6]pyrido[3,4-e]pyrimidin-5(8H)-one, 2-methyl-4-methylthiomethyl-4H-pyrazolo[1,5-a]pyrazolo[4',3':5,6]pyrido[3,4-e]pyrimidin-5(8H)-one is obtained.