V. Makarov, O. Ryabova, L. Alekseeva
Feb 1, 2003
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Journal
Chemistry of Heterocyclic Compounds
Abstract
The reaction of 3,5-di-(N,N-dimethylaminomethylene)amino-4-methoxycarbonylpyrazole and 3,5-di-(N,N-dimethylaminomethylene)amino-4-cyanopyrazole with different amines occurs with formation of pyrazolo[3,4-d]pyrimidines. In some reactions, an excess of amines leads to their conversion to N,N-dimethylformamidine derivatives. The structure of the compounds obtained has been confirmed by 1H NMR and 13C spectroscopy.