Abstract
4-Alkylamino-1-methylpyrazolo[3,4-d]pyrimidine-3-carbonitriles have been synthesised in 54–81% yields by condensation of N-substituted amides with 5-amino-1-methylpyrazole-3,4-dicarbonitrile via a Dimroth rearrangement in what is formally an anhydrous medium; the procedure thus permits the synthesis of pyrazolo[3,4-d]-pyrimidines with substituents sensitive to hydration.
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More From: Journal of the Chemical Society. Perkin transactions 1
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