Synthesis and halogenation of allylthioethers of pyrazolo[3,4-d]pyrimidine

The interaction of 6-allylthio-4-imino-1-methyl-3-methylthio-5-phenyl-1,5-dihydro-4H-pyrazolo[3,4-d]-pyrimidine with bromine leads to the formation of 8-bromomethyl-4-imino-1-methyl-3-methylthio-5-phenyl-4,5,7,8-tetrahydro-1H-pyrazolo[4,3-e][1,3]thiazolo[3,2-a] pyrimidinium tribromide. __________ Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 602–604. April, 2007.