A versatile strategy for difunctionalization of carbon-carbon multiple bonds by photoredox catalysis

Photoredox catalysis has emerged as a strong synthetic tool for radical reactions. In particular, a variety of regioselective difunctionalizations of carbon-carbon multiple bonds through SET photoredox processes (oxidative quenching cycle) have been accomplished by an appropriate choice of an electrophilic radical precursor and a nucleophile. The basic concept, representative results and future prospect are the topics of this article.