Volume 60, Issue 10 pp. 5262-5267
Communication

Fast Enantio- and Chemoselective Arylation of Ketones with Organoboronic Esters Enabled by Nickel/N-Heterocyclic Carbene Catalysis

Dr. Yuan Cai

Dr. Yuan Cai

State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032 China

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Lin-Xin Ruan

Lin-Xin Ruan

State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032 China

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Dr. Abdul Rahman

Dr. Abdul Rahman

State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032 China

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Prof. Dr. Shi-Liang Shi

Corresponding Author

Prof. Dr. Shi-Liang Shi

State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032 China

School of Pharmacy, Fudan University, Shanghai, 201203 China

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First published: 26 November 2020
Citations: 57

Dedicated to the 70th anniversary of Shanghai Institute of Organic Chemistry (SIOC)

Graphical Abstract

A method for general asymmetric addition of arylborons to simple ketones is reported, which is enabled by nickel/N-heterocyclic carbene catalysis. Chiral tertiary alcohols are furnished with high efficiency and excellent levels of enantio- and chemocontrol, and the method offers a broad substrate scope.

Abstract

A general, efficient, highly enantio- and chemoselective N-heterocyclic carbene (NHC)/Ni-catalyzed addition of readily available and stable arylboronic esters to ketones is reported. This protocol provides unexpectedly fast access (usually 10 min) to various chiral tertiary alcohols with exceptionally broad substrate scope and excellent functional group tolerance (76 examples, up to 98 % ee). This process is orthogonal to other known Ni-mediated Suzuki–Miyaura couplings, as it tolerates aryl chlorides, fluorides, ethers, esters, amides, nitriles, and alkyl chlorides. The reaction is applied to late-stage modifications of various densely functionalized medicinally relevant molecules. Preliminary mechanistic studies suggest that a rare enantioselective η2-coordinating activation of ketone carbonyls is involved. This cross-coupling-like mechanism is expected to enable other challenging transformations of ketones.

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