Olefin Hydroarylation Catalyzed by a Single-Component Cobalt(-I) Complex
作者:Benjamin A. Suslick、T. Don Tilley
DOI:10.1021/acs.orglett.1c00258
日期:2021.2.19
has been developed for olefinhydroarylations with (N-aryl)aryl imine substrates. More than 40 examples were examined under mild reaction conditions to afford the desired alkyl-arene product in good to excellent yields. Catalysis occurs in a regioselective manner to afford exclusively branched products with styrene-derived substrates or linear products for aliphatic olefins. Electron-withdrawing functional
Regioselectivity-Switchable Hydroarylation of Styrenes
作者:Ke Gao、Naohiko Yoshikai
DOI:10.1021/ja108809u
日期:2011.1.26
Cobalt-phosphine and cobalt-carbene catalysts have been developed for the hydroarylation of styrenes via chelation-assisted C-H bond activation, to afford branched and linear addition products, respectively, in a highly regioselective fashion. Deuterium-labeling experiments suggested a mechanism involving reversible C-H bond cleavage and olefin insertion steps and reductive elimination as the rate-
Cobalt-Phenanthroline Catalysts for the ortho Alkylation of Aromatic Imines under Mild Reaction Conditions
作者:Ke Gao、Naohiko Yoshikai
DOI:10.1002/anie.201101823
日期:2011.7.18
with phenanthroline‐type ligands and activated with Grignard reagents serve as inexpensive and effective catalysts for the ortho alkylation of aromaticimines with a variety of olefins (see scheme). The new catalytic systems feature remarkably mild reaction conditions for CH bond activation and functionalization.
Highly Linear Selective Cobalt-Catalyzed Addition of Aryl Imines to Styrenes: Reversing Intrinsic Regioselectivity by Ligand Elaboration
作者:Wengang Xu、Naohiko Yoshikai
DOI:10.1002/anie.201408028
日期:2014.12.15
Highlylinearselective, imine‐directed hydroarylation of styrene has been achieved with cobalt‐based catalytic systems featuring bis(2,4‐dimethoxyphenyl)(phenyl)phosphine and either 2‐methoxypyridine or DBU as a ligand and a Lewis base additive, respectively, thus affording a variety of 1,2‐diarylethanes (bibenzyls) in good yields under mild reaction conditions. The triarylphosphine controls the regioselectivity
Anti-Markovnikov hydroarylation of styrenes catalyzed by an in situ generated ruthenium complex
作者:Rémi Martinez、Jean-Pierre Genet、Sylvain Darses
DOI:10.1039/b806121a
日期:——
An efficient and practical catalytic system for the anti-Markovnikov ruthenium-catalyzed hydroarylation of styrenes with acetophenone, allowing a straightforward access to bibenzyl backbones, is described for the first time: this process, involving regioselective C-H bond activation, is complementary to a Friedel-Crafts type reaction giving the branched adduct.