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Synthesis of 2-benzoylethynylpyrroles by cross coupling of 2-arylpyrroles with 1-benzoyl-2-bromoacetylene over aluminum oxide

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Abstract

Cross coupling of 2-arylpyrrole with benzoylbromoacetylene over aluminum oxide at room temperature gave 45–94% of 2-(benzoylethynyl)-5-arylpyrroles. Intermediate 2-(2-benzoyl-1-bromoethenyl)-5-arylpyrroles were isolated in up to 19% yield. The reaction was accompanied by formation of less than 5% of adducts of the initial pyrroles with the cross-coupling products, 2-benzoyl-1,1-bis(5-arylpyrrol-2-yl)ethenes.

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Original Russian Text © B.A. Trofimov, L.N. Sobenina, Z.V. Stepanova, A.P. Demenev, A.I. Mikhaleva, I.A. Ushakov, T.I. Vakul’skaya, O.V. Petrova, 2006, published in Zhurnal Organicheskoi Khimii, 2006, Vol. 42, No. 9, pp. 1366–1372.

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Trofimov, B.A., Sobenina, L.N., Stepanova, Z.V. et al. Synthesis of 2-benzoylethynylpyrroles by cross coupling of 2-arylpyrroles with 1-benzoyl-2-bromoacetylene over aluminum oxide. Russ J Org Chem 42, 1348–1355 (2006). https://doi.org/10.1134/S1070428006090168

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  • DOI: https://doi.org/10.1134/S1070428006090168

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