Abstract
Convenient methods of synthesis of novel polyaza pyrimidines and polyaza pyrazoles have been described in this paper. The synthetic method is based on one-pot, three-component cyclocondensation of α-oxoketene dithioacetals, 2,6-diaminopyridine, and guanidine/hydrazine. Polyaza S,N-acetals have been generated in situ by treating α-oxoketene dithioacetals with 2,6-diaminopyridine in the presence of n-butyl lithium, which were subsequently treated with guanidine nitrate and hydrazine hydrate to afford polyaza pyrimidines and polyaza pyrazoles, respectively.
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