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Synthesis of diarylazolo[a]pyridines from [(Z)-2,4-diaryl-4-oxo-2-butenyl]azolium salts

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Chemistry of Heterocyclic Compounds Aims and scope

A method for the synthesis of derivatives of [1, 3]thiazolo[3,2-a]pyridines, pyrido[2,1-b][1, 3]benzo-thiazole, [1, 3, 4]thiadiazolo[3,2-a]pyridine, and [1, 2, 4]triazolo[4,3-a]pyridine, which includes base initiated cyclization of quaternary azolium salts, formed by the interaction of (Z)-1,3-diaryl-4-bromo-2-buten-1-ones with 1-alkyl-1H-1,2,4-triazoles, 4-methyl-1,3-thiazole, 1,3-benzothiazole, and N-phenyl-1,3,4-thiadiazole-2-amine. Derivatives of 2-chloroimidazo[1,2-a]pyridine were obtained when 5-chloro-1-methyl-1H-imidazole was used.

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Correspondence to L. M. Potikha.

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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, 275-287, February, 2010.

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Potikha, L.M., Turelyk, A.R., Kovtunenko, V.A. et al. Synthesis of diarylazolo[a]pyridines from [(Z)-2,4-diaryl-4-oxo-2-butenyl]azolium salts. Chem Heterocycl Comp 46, 223–231 (2010).

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