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).
Serial Ligand Catalysis: A Highly Selective Allylic C−H Oxidation
作者:Mark S. Chen、Prabagaran Narayanasamy、Nathan A. Labenz、M. Christina White
DOI:10.1021/ja0500198
日期:2005.5.18
We are reporting a mild, chemo-, and highly regioselective Pd(II)-catalyzed allylicoxidation of alpha-olefins to furnish branched allylic esters that proceeds via a novel serial ligand catalysis mechanism in which two different ligands (i.e., vinyl sulfoxide 2 and BQ) interact sequentially with the metal to promote distinct steps of the catalytic cycle (i.e., C-H cleavage and pi-allyl functionalization
Copper-catalyzed regioselective allylic oxidation of olefins via C–H activation
作者:Nengbo Zhu、Bo Qian、Haigen Xiong、Hongli Bao
DOI:10.1016/j.tetlet.2017.09.047
日期:2017.10
A regioselective oxidation of allylic C–H bond to C–O bond catalyzed by copper (I) was developed with diacyl peroxides as oxidants. The oxidation of allylic C–H bond was accomplished with good yield and regioselectivity under mild reaction conditions. This method has a broad substrate scope including cyclic olefins, terminal and internal acyclic olefins and allyl benzene compounds. The reaction proceeds
Allylsulfones through Palladium‐Catalyzed Allylic C−H Sulfonylation of Terminal Alkenes
作者:Tingting Chen、Jassmin Lahbi、Gianluigi Broggini、Alexandre Pradal、Giovanni Poli
DOI:10.1002/ejoc.202201493
日期:2023.2.17
distinct protocols for the preparation of allylsulfones via Pd(II)-catalyzed allylicC−H activation. While the former protocol consists of a direct Pd(II)-catalyzed oxidative C−Hallylicsulfonylation in the presence of sulfinate anions, the latter involves a sequential one-pot Pd(II)-catalyzed C−Hallylic acetoxylation followed by a Pd(0)-catalyzed sulfonylation.