Some reactions of 4-aminopyrazolo[3,4-d]pyrimidines

New 3-bromo and 1,4-diaminomethyl derivatives of 4-aminopyrazolo3,4-d]pyrimidine were obtained by bromination and aminomethylation, respectively. 4-Bromopyrazolo3,4-d]pyrimidines were synthesized for the first time by diazotization of 4-aminopyrazolo3,4-d]pyrimidines.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 982–984, July, 1982.