The reaction between 5-amino-4-imino-1(2)-substituted-1(2)H-4,5-dihydropyrazolo[3,4-d]pyrimidines, e.g. I, and several com. available reactants afforded new heterocycles with a conserved pyrazolo[3,4-d]pyrimidine nucleus, e.g. II. The key intermediates employed proved to be suitable compds. by virtue of their two vicinal amino and imino groups that were used to obtain five, six and seven-membered rings.
Synthesis of new pyrazolo[4,3-e]-1,2,4-triazolo[1,5-c]pyrimidines and related heterocycles
BARALDI, Pier Giovanni;FRUTTAROLO, Francesca
2004
Abstract
The reaction between 5-amino-4-imino-1(2)-substituted-1(2)H-4,5-dihydropyrazolo[3,4-d]pyrimidines, e.g. I, and several com. available reactants afforded new heterocycles with a conserved pyrazolo[3,4-d]pyrimidine nucleus, e.g. II. The key intermediates employed proved to be suitable compds. by virtue of their two vicinal amino and imino groups that were used to obtain five, six and seven-membered rings.File in questo prodotto:
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