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Published in 2021 at "Tetrahedron"
DOI: 10.1016/j.tet.2021.131957
Abstract: Abstract The reaction of Nā-(aryl)benzothiohydrazides with 2-chloro-7-cyclopropyl-3-nitro-4-oxothieno[2,3-b]pyridine-5-carboxylic ester/acid in the presence of triethylamine furnished, upon addition of iodomethane, the respective 1,3,4-thiadiazoline-(6-methylthio-4-oxopyridine) hybrids. Interestingly, the reaction of thiohydrazides with 4-oxothieno[2,3-b]pyridines incorporating N1-(2ā-halogeno-5ā-nitrophenyl) entities generated 1,3-thiazoline ring…
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Keywords:
opening reactions;
thiadiazoline;
thiophene ring;
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