SYNTHESIS AND HALOCYCLIZATION OF 2-MERCAPTONICOTINIC ACID PROPARGYL DERIVATIVES
DOI:
https://doi.org/10.1007/5007Keywords:
prop-2-yn-1-yl 2-(prop-2-yn-1-ylsulfanyl)pyridine-3-carboxylate, 2-(prop-2-yn-1-ylsulfanyl)pyridine-3-carboxylic acid, 3halomethylidene-8-carboxy-2, 3-dihydro[1, 3]thiazolo[3, 2-a]pyridin-4-ium trihalide and halide, 3-iodomethylidene-8-[(2, 3-diiodoprop-2en-1-yl)oxy]carbonyl-2, 2-a]pyridin-4-ium triiodide, halocyclization.Abstract
Alkylation of 2-sulfanylpyridine-3-carboxylic acid with 3-bromo-1-propyne proceeds with the formation of 2-(prop-2-yn-1-ylsulfanyl)-pyridine-3-carboxylic acid and prop-2-yn-1-yl 2-(prop-2-yn-1-ylsulfanyl)pyridine-3-carboxylate, which react with bromine and iodine to form 2,3-dihydro[1,3]thiazolo[3,2-a]pyridinium systems.
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Published
2019-05-22
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Short Communications