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Synthesis and Reactions of Pyranobenzimidazole-2-thiones from Dehydroacetic Acid

Rachedine Kaoua 1 Norah Bennamane Yann Le Gal 1 Fadela Balegroune Thierry Roisnel 1 Dominique Lorcy 1 Bellara Nedjar-Kolli
1 ISCR - Institut des Sciences Chimiques de Rennes
Abstract : An efficient synthesis of pyranobenzimidazole-2-thiones has been described through reaction of carbon disulfide or thiophosgene with enaminone. The alkylation of pyranobenzimidazole-2-thione in the presence of methyl iodide furnished the desired S-methylated derivatives, and the reaction of pyranobenzimidazole-2-thione with copper (I) iodide and triphenylphosphine gave a dimeric complex [Cu (PPh3) (bzimtH)](2).
Keywords : Benzimidazole-2-thione Dehydroacetic acid Triphenylphosphine Carbon disulfide Complex
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-01709526
Contributor : Laurent Jonchère <>
Submitted on : Thursday, February 15, 2018 - 9:39:02 AM
Last modification on : Wednesday, April 7, 2021 - 3:18:09 PM

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  • HAL Id : hal-01709526, version 1

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Rachedine Kaoua, Norah Bennamane, Yann Le Gal, Fadela Balegroune, Thierry Roisnel, et al.. Synthesis and Reactions of Pyranobenzimidazole-2-thiones from Dehydroacetic Acid. Indian Journal of Heterocyclic Chemistry, 2017, 27 (3), pp.319-325. ⟨hal-01709526⟩

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