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Published on: January 4, 2018
Copper-Photocatalyzed Borylation of Organic Halides under Batch and Continuous-Flow Conditions
Antoine Nitelet1, Damien Thevenet2, Bruno Schiavi2
1Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), 76000, Rouen, France.
Abstract:
The copper-photocatalyzed borylation of aryl, heteroaryl, vinyl and alkyl halides (I and Br) was reported. The reaction proceeded using a new heteroleptic Cu complex under irradiation with blue LEDs, giving the corresponding boronic-acid esters in good to excellent yields. The reaction was extended to continuous-flow conditions to allow an easy scale-up. The mechanism of the reaction was studied and a mechanism based on a reductive quenching (CuI /CuI */Cu0 ) was suggested.
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