Strongly Reducing, Visible-Light Organic Photoredox Catalysts As Sustainable Alternatives to Precious Metals

Overview

Journal Chemistry

Specialty Chemistry

Date 2017 Jun 28

PMID 28654171

Citations 54

Authors

Ya Du

Ryan M Pearson

Chern-Hooi Lim

Steven M Sartor

Matthew D Ryan

Haishen Yang

Niels H Damrauer

Garret M Miyake

Affiliations

Soon will be listed here.

Abstract

Photoredox catalysis is a versatile approach for the construction of challenging covalent bonds under mild reaction conditions, commonly using photoredox catalysts (PCs) derived from precious metals. As such, there is need to develop organic analogues as sustainable replacements. Although several organic PCs have been introduced, there remains a lack of strongly reducing, visible-light organic PCs. Herein, we establish the critical photophysical and electrochemical characteristics of both a dihydrophenazine and a phenoxazine system that enables their success as strongly reducing, visible-light PCs for trifluoromethylation reactions and dual photoredox/nickel-catalyzed C-N and C-S cross-coupling reactions, both of which have been historically exclusive to precious metal PCs.

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