Abstract
5-Amino-1,3,4-oxadiazolium perchlorates react with 1,3-carbonyl-functional compounds to give 1,3,4-oxadiazolo[3,2-α]pyrimidinium perchlorates. The latter are cleaved by both alkali and strong acid to give 1-amino-2-pyrimidinone or 5-amino-1,3,4-oxadiazole derivatives. The l,3,4-oxadiazolo[3,2-α]pyrimidinium perchlorates react with anailine and hydrazines to give sym-triazolo[1,5-α]pyrimidinium salts and with acetylacetone to give pyrazolo[1,5-α]pyrimidines.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1493–1498, November, 1975.
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Bachkovskii, I.P., Chuiguk, V.A. 1,3,4-Oxadiazolo[3,2-α]pyrimidinium salts. Chem Heterocycl Compd 11, 1272–1277 (1975). https://doi.org/10.1007/BF00474452
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DOI: https://doi.org/10.1007/BF00474452