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Visible light C-H amidation of heteroarenes with benzoyl azides

Abstract : Benzoyl azides were used for the direct and atom economic C-H amidation of electron rich heteroarenes in the presence of phosphoric acid, a photocatalyst and visible light. Hetero-aromatic amides are obtained in good yields at very mild reaction conditions with dinitrogen as the only by-product. The reaction allows the use of aryl-, heteroaryl-or alkenyl acyl azides and has a wide scope for heteroarenes, including pyrroles, indole, furan, benzofuran and thiophene giving good regio-selectivities and yields.
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Etienne Brachet, T. Ghosh, I. Ghosh, B König. Visible light C-H amidation of heteroarenes with benzoyl azides. Chemical Science , The Royal Society of Chemistry, 2015, 6 (2), pp.987-992. ⟨10.1039/c4sc02365j⟩. ⟨hal-02418685⟩

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