Visible Light Induced Rhodium(I)-Catalyzed C-H Borylation

Abstract : An efficient visible light induced rhodium(I)-catalyzed regioselective borylation of aromatic C-H bonds is reported. The photocatalytic system is based on a single NHC-Rh complex capable of both harvesting visible light and enabling the bond breaking/forming at room temperature. The chelating nature of the NHC-carboxylate ligand was critical to ensure the stability of the Rh complex and to provide excellent photocatalytic activities. Experimental mechanistic studies evidenced a photooxidative ortho C-H bond addition upon irradiation with blue LEDs, leading to a cyclometalated Rh -hydride intermediate.
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Submitted on : Monday, October 7, 2019 - 11:51:53 AM
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Jompol Thongpaen, Romane Manguin, Vincent Dorcet, Thomas Vives, Carine Duhayon, et al.. Visible Light Induced Rhodium(I)-Catalyzed C-H Borylation. Angewandte Chemie International Edition, Wiley-VCH Verlag, 2019, 58 (43), pp.15244-15248. ⟨10.1002/anie.201905924⟩. ⟨hal-02307077⟩



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