Visible Light Induced Rhodium(I)-Catalyzed C-H Borylation
Résumé
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.
Domaines
Chimie
Fichier principal
Baslé et al-Visible Light Induced Rhodium(I)-Catalyzed Directed C-H Borylation-4.pdf (1.14 Mo)
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