Nickel‐Catalyzed Electrochemical Reductive Relay Cross‐Coupling of Alkyl Halides to Aryl Halides
作者:Ke‐Jin Jiao、Dong Liu、Hong‐Xing Ma、Hui Qiu、Ping Fang、Tian‐Sheng Mei
DOI:10.1002/anie.201912753
日期:2020.4.16
A highly regioselective Ni-catalyzed electrochemical reductive relay cross-coupling between an aryl halide and an alkylhalide has been developed in an undivided cell. Various functional groups are tolerated under these mild reaction conditions, which provides an alternative approach for the synthesis of 1,1-diarylalkanes.
ligand-controlled nickel migration/arylation. This general protocol allows the use of abundant and bench-stable alkyl bromides and aryl bromides for the synthesis of a wide range of structurally diverse 1,1-diarylalkanes in excellent yields and high regioselectivities under mild conditions. We also demonstrated that alkyl bromide could be replaced by the proposed olefin intermediate while using n-propyl bromide/Mn0
Kinetic and Thermodynamic Barriers to Carbon and Oxygen Alkylation of Phenol and Phenoxide Ion by the 1-(4-Methoxyphenyl)ethyl Carbocation
作者:Yutaka Tsuji、Maria M. Toteva、Heather A. Garth、John P. Richard
DOI:10.1021/ja037328n
日期:2003.12.1
phenol and azide ion to 1+ using k(az) = 5 x 10(9) M(-1) s(-1) for the diffusion-limited reaction of azide ion. A selectivity of 230:20:1 was determined for alkylation of phenol at oxygen, C-4 and C-2 to form 1-OPh and biphenyls 1-(4-C6H4OH) and 1-(2-C6H4OH), respectively, and of 2:2:1 for alkylation of the corresponding nucleophilic sites of phenoxideion in diffusion-limited reactions. The Mayr nucleophilicity
The general protocol for site-specific alkylation of anilines and phenols would provide an ideal strategy for affording densely functionalized aniline and phenol derivatives. Herein, we disclose a new iridium-catalyzed and acid-promoted process for selective para-alkylation of anilines and phenols using aryloxy or alkoxy aryl alkynes as the alkylated sources, delivering a wide range of para-C-alkylated