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Krause A. A. Rumler A. Hagen F. Jansch H. J. Shturm I. G. Dubur G. Ya. 《Chemistry of Heterocyclic Compounds》1992,28(1):67-70
The condensation of salts of amidinium vinylogs with N-R-thiocarbamoylacetamides gave 3-(N-R)carbamoyl-5-(pyrid-4-yl)pyridine-2(1H)-thiones, which undergo oxidative cyclization in concentrated sulfuric acid with the formation of 3-oxo-5-(pyrid-4-yl)isothiazolo[5,4-b]pyridines. The oxidation and alkylation of the compounds referred to were investigated.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 75–79, January, 1992. 相似文献
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