Synthesis of diarylazolo[a]pyridines from [(Z)-2,4-diaryl-4-oxo-2-butenyl]azolium salts |
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Authors: | L. M. Potikha A. R. Turelyk V. A. Kovtunenko A. V. Turov |
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Affiliation: | (1) Taras Shevchenko Kiev National University, Kiev, 01033, Ukraine |
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Abstract: | 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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