Allylic CH Alkylation of Unactivated α-Olefins: Serial Ligand Catalysis Resumed
作者:Andrew J. Young、M. Christina White
DOI:10.1002/anie.201101654
日期:2011.7.18
A delicate interplay of several kinetically labile ligands is required for reactions that proceed through serial ligand catalysis mechanisms. An investigation of the disruption of this balance has enabled the development of a method for the intermolecular allylicCH alkylation of unactivated as well as activated α‐olefins (see example, Bn=benzyl).
The first electrophilic Pd(II)-catalyzed allylic C H alkylation is reported, providing a novel method for formation of sp3-sp3 C C bonds directly from C H bonds. A wide range of aromatic and heteroaromatic linear (E)-alpha-nitro-arylpentenoates are obtained as single olefin isomers in excellent yields directly from terminal olefin substrates and methyl nitroacetate. The use of DMSO as a pi-acidic ligand