Volume 132, Issue 47 pp. 21017-21022
Zuschrift

para-Selective Arylation of Arenes: A Direct Route to Biaryls by Norbornene Relay Palladation

Dr. Uttam Dutta

Dr. Uttam Dutta

Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400 076 India

These authors contributed equally to this work.

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Sandip Porey

Sandip Porey

Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400 076 India

These authors contributed equally to this work.

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Sandeep Pimparkar

Sandeep Pimparkar

Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400 076 India

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Astam Mandal

Astam Mandal

Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400 076 India

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Jagrit Grover

Jagrit Grover

Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400 076 India

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Adithyaraj Koodan

Adithyaraj Koodan

Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400 076 India

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Dr. Debabrata Maiti

Corresponding Author

Dr. Debabrata Maiti

Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400 076 India

Tokyo Tech World Research Hub Initiative (WRHI) Laboratory for Chemistry and Life Science, Tokyo Institute of Technology, Tokyo, 152-8550 Japan

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First published: 04 August 2020
Citations: 13

Dedicated to Professor Sourav Pal on the occasion of his 65th birthday

Abstract

Biaryl compounds are extremely important structural motifs in natural products, biologically active components and pharmaceuticals. Selective synthesis of biaryls by distinguishing the subtle reactivity difference of distal arene C−H bonds are significantly challenging. Herein, we describe para-selective C−H arylation, which is acheived by a unique combination of a meta-directing group and norbornene as a transient mediator. Upon direct meta-C−H palladation, one-bond relay palladation occurs in presence of norbornene and subsequently para-C−H arylation is achieved for sulfonates, phosphonates and phenols bearing 2,6-disubstitution patterns. The protocol is amenable to electron-deficient aryl iodides. Multisubstituted arenes and phenols are obtained by postsynthetic modification of the products. The protocol allows the synthesis of hexa-substituted benzene by sequential selective distal C−H functionalization.

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