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[(DPEPhos)(bcp)Cu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst
Published on: May 21, 2019
Phenyl bridging in ring-substituted cumyloxyl radicals. A product and time-resolved kinetic study
Michela Salamone1, Massimo Bietti, Alessandra Calcagni
1Dipartimento di Scienze e Tecnologie Chimiche, Universita Tor Vergata, Via della Ricerca Scientifica, 1 I-00133 Rome, Italy.
Abstract:
The reactivity of cumyloxyl radicals bearing cyclopropyl and 2,2-diphenylcyclopropyl groups in the para position has been investigated. Depending on radical structure, products deriving from C-C beta-scission and/or cyclopropyl ring-opening are observed, supporting the hypothesis that cumyloxyl (and, more generally, arylcarbinyloxyl) radicals exist in equilibrium with 1-oxaspiro[2,5]octadienyl radicals, in full agreement with the previously proposed mechanism for the O-neophyl rearrangement of 1,1-diarylalkoxyl radicals.
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