Chemistry of Heterocyclic Compounds p. 530 - 533 (1991)
Update date:2022-09-26
Topics:
Rusinov, V. L.
Myasnikov, A. V.
Chupakhin, O. N.
Aleksandrov, G. G.
It is shown that contraction of the pyrimidine ring occurs when 6-nitro-7-oxo-4,7-dihydroazolo<1,5-a>pyrimidines are heated with hydrazine hydrate.Complexes of 4-nitropyrazole with 5-aminoazoles, the structures of which were proved by x-ray diffraction analysis, are formed in a similar reaction of nitrosubstituted azolopyrimidines that do not contain an oxo function.
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