Bis-<i>N</i>-heterocyclic Carbene Palladium(IV) Tetrachloride Complexes: Synthesis, Reactivity, and Mechanisms of Direct Chlorinations and Oxidations of Organic Substrates
作者:A. Scott McCall、Hongwang Wang、John M. Desper、Stefan Kraft
DOI:10.1021/ja107342b
日期:2011.2.16
the preparation and isolation of novel octahedral CH(2)-bridged bis-(N-heterocycliccarbene)palladium(IV) tetrachlorides of the general formula LPd(IV)Cl(4) [L = (NHC)CH(2)(NHC)] from LPd(II)Cl(2) and Cl(2). In intermolecular, nonchelation-controlled transformations LPd(IV)Cl(4) reacted with alkenes and alkynes to 1,2-dichlorination adducts. Aromatic, benzylic, and aliphatic C-H bonds were converted into
Selective chlorination of 4-alkylphenols ethers with SbF5/CH2Cl2 (CHCl3, CCl4) yields 4-chlorocyclohexa -2,5-dienones; no alpha-chlorination to a carbonyl group is observed in the reaction conditions.