Volume 57, Issue 51 pp. 16648-16653
Communication

Light-Induced Gold-Catalyzed Hiyama Arylation: A Coupling Access to Biarylboronates

Jin Xie

Corresponding Author

Jin Xie

State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023 P. R. China

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Kohei Sekine

Kohei Sekine

Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany

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Sina Witzel

Sina Witzel

Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany

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Petra Krämer

Petra Krämer

Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany

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Matthias Rudolph

Matthias Rudolph

Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany

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Frank Rominger

Frank Rominger

Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany

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A. Stephen K. Hashmi

Corresponding Author

A. Stephen K. Hashmi

Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany

Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, 21589 Saudi Arabia

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First published: 09 October 2018
Citations: 97

Graphical Abstract

Organoboron compounds are versatile synthetic building blocks. A new strategy, namely a photochemical gold-catalyzed chemoselective Hiyama arylation of B,Si bimetallic reagents with diazonium salts, which is orthogonal to common strategies and therefore a unique tool for synthesis of valuable biarylboronates, has been developed. With this new methodology a wide array of diversely functionalized sp2- and sp3-hybridized biarylboronates were obtained.

Abstract

Organoboron compounds are versatile synthetic building blocks. We herein report a new strategy, a photochemical gold-catalyzed chemo-selective Hiyama arylation of B,Si bifunctionalized reagents with diazonium salts, which is orthogonal to common strategies and therefore a unique tool for synthesis of valuable biarylboronates. With this new methodology a wide array of diversely functionalized sp2- and sp3-hybridized biarylboronates were obtained. Notably, the synergism of gold catalysis with copper catalysis or palladium catalysis, allows for one-pot iterative C−X (heteroatom) and C−C couplings for the rapid assembly of several simple fragments to relatively complex molecules. Mechanistic studies indicated that photosensitizer-free conditions were superior to gold/Ru(bpy)3Cl2 dual catalysis.

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