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. Author manuscript; available in PMC: 2017 Sep 2.
Published in final edited form as: Science. 2016 Sep 2;353(6303):1014–1018. doi: 10.1126/science.aaf7783

Fig. 1. Strategies for hydrogen-atom-transfer-mediated C–H oxidation.

Fig. 1

(A) Radical rebound mechanism for enzymatic and biomimetic C–H hydroxylation and halogenation (X = halide). (B) Radical relay pathway for C–H oxidation involving formation of a free radical that is trapped by a reactive metal center. (C) Proposed mechanism for Cu-catalyzed enantioselective cyanation of benzylic C–H bonds via radical relay.