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Synthesis of Pyrrolo[2,1-b]thiazol-3-one Derivatives

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Summary.

Ethyl [4-oxo-3-(2-oxo-2-arylethyl)thiazolidin-2-ylidene]acetates and [4-oxo-3-(2-oxo-2-arylethyl)thiazolidin-2-ylidene]acetonitriles were shown to react with substituted benzaldehydes at the endocyclic methylene group leading to the corresponding 5-arylmethylidene derivatives. Their treatment with DMF · POCl3 complex yielded 3-oxo-5-aroyl-2-arylmethylidene-2,3-dihydropyrrolo[2,1-b]thiazole-7-carboxylic acids ethyl esters and -7-carbonitriles. The structures of the pyrrolothiazoles were confirmed by an X-ray crystallographic study, which indicated the (Z)-configuration at the arylmethylidene moiety.

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Correspondence to Anton V. Tverdokhlebov.

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Tverdokhlebov, A., Andrushko, A., Tolmachev, A. et al. Synthesis of Pyrrolo[2,1-b]thiazol-3-one Derivatives. Monatsh. Chem. 136, 1781–1790 (2005). https://doi.org/10.1007/s00706-005-0356-1

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  • DOI: https://doi.org/10.1007/s00706-005-0356-1

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