Bioinspired Photocatalysed C-H Fluoroalkylation of Arenes in Water Promoted by Native Vitamin B12 and Rose Bengal
2021
The first perfluoroalkylation reaction of activated arenes (amino-substituted arenes and alkoxyarenes) has been achieved in water by employing the dyad Rose Bengal and hydrosoluble unmodified vitamin B12 (cyanocobalamin) as the photocatalyst and co-catalyst, respectively. The reaction was performed under green LED irradiation and employed perfluoroalkyl bromides as the perfluoroalkyl radical sources. In particular, the presence of vitamin B12 co-catalyst was found to be fundamental to elicit the formation of perfluoroalkyl radicals.
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