反应详情

By substituting an equivalent amount of 4-hydrazino-1H-pyrazolo[3,4-b]pyridine-5-carboxylic acid, ethyl ester for the 1-ethyl-4-hydrazino-1H-pyrazolo[3,4-b]pyridine-5-carboxylic acid, ethyl ester in the procedure of Example 1 a and continuing as in parts b, c and d, 5-chloro-2-methyl-8H-pyrazolo[1,5a]pyrazolo[4',3':5,6]pyrido[3,4-e]pyrimidine and N-butyl-2-methyl-8H-pyrazolo[1,5-a]pyrazolo[4',3':5,6]pyrido[3,4-e]pyrimidin-5-amine respectively, are obtained.