Transition-Metal-Catalyzed Regioselective C–H Borylation of ­Pyridines

Abstract

The C–H borylation strategy has spurred intense research endeavors due to the high atom- and step-economy it represents and because of the broad range of utilities of the resulting organoboranes. Nevertheless, this powerful transformation has had limited substrate scope and poor regioselectivity when it was applied to Lewis basic substrates (e.g., azines). The basic functionalities in substrates can coordinate to the metal centers, hindering the formation of products. Herein, we provide a brief overview of recent advances in transition-metal-­catalyzed regioselective C–H borylation of pyridines. Attention is paid to the latest contributions, which have demonstrated remarkable ­regioselectivity.

1 Introduction

2 para-Selective C−H Borylation

3 meta-Selective C−H Borylation

4 ortho-Selective C−H Borylation

5 Summary

Key words

borylation - C–H activation - regioselectivity - pyridines - transition metals

Publication History

Received: 15 June 2022

Accepted after revision: 03 July 2022

Accepted Manuscript online:
03 July 2022

Article published online:
29 July 2022

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