Selective Activation of Benzylic Carbon−Hydrogen Bonds of Toluenes with Rhodium(III) Porphyrin Methyl: Scope and Mechanism
作者:Kwong Shing Choi、Peng Fai Chiu、Kin Shing Chan
DOI:10.1021/om9009119
日期:2010.2.8
Toluenes underwent selective benzylic carbon−hydrogen bond activation (BnCHA) with rhodium(III) porphyrin methyl. The ortho-, meta-, and para-substituted toluenes yielded the corresponding rhodium porphyrin benzyls in high yields in solvent-free conditions as well as in benzene solvent. Mechanistically, Rh(ttp)Me likely undergoes a σ-bond metathesis pathway. The small value of the kinetic isotope effect