Issue 28, 2022

Visible light-induced functionalization of indazole and pyrazole: a recent update

Abstract

Indazole and pyrazole are renowned as a prodigious class of heterocycles having versatile uses in medicinal as well as industrial chemistry. Considering sustainable approaches, recently, photocatalysis has become an indispensable tool in organic chemistry due to its application for the activation of small molecules and the use of a clean energy source. In this review, we have highlighted the use of metal-based photocatalysts, organic photoredox catalysts, energy transfer photocatalysts and electron-donor–acceptor complexes in the functionalization of indazole and pyrazole. This perspective is arranged based on the types of functionalization reactions on indazole and pyrazole. A detailed discussion regarding the reaction mechanism of each reaction is given to provide a comprehensive guide to the reader. Finally, a summary of existing challenges and the future outlook towards the development of efficient photocatalytic methods for functionalization of these heterocycles is also presented.

Graphical abstract: Visible light-induced functionalization of indazole and pyrazole: a recent update

Article information

Article type
Feature Article
Submitted
01 ม.ค. 2565
Accepted
28 ก.พ. 2565
First published
28 ก.พ. 2565

Chem. Commun., 2022,58, 4435-4455

Visible light-induced functionalization of indazole and pyrazole: a recent update

D. Ghosh, S. Ghosh, A. Ghosh, P. Pyne, S. Majumder and A. Hajra, Chem. Commun., 2022, 58, 4435 DOI: 10.1039/D2CC00002D

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