Iodine Catalysis for C(sp3 )-H Fluorination with a Nucleophilic Fluorine Source
- PMID: 32421217
- DOI: 10.1002/anie.202004902
Iodine Catalysis for C(sp3 )-H Fluorination with a Nucleophilic Fluorine Source
Abstract
Iodine catalysis was developed for aliphatic fluorination through light-promoted homolytic C-H bond cleavage. The intermediary formation of amidyl radicals enables selective C-H functionalization via carbon-centered radicals. For the subsequent C-F bond formation, previous methods have typically been limited by a requirement for electrophilic fluorine reagents. We here demonstrate that the intermediary instalment of a carbon-iodine bond sets the stage for an umpolung, thereby establishing an unprecedented nucleophilic fluorination pathway.
Keywords: C−H bond cleavage; C−H fluorination; amidyl radicals; halogen catalysis; iodine.
© 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
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