Visible-Light-Induced C─S Bond Formation Catalyzed by the Organic Photocatalyst Eosin Y

The development of green and efficient C─S bond formation methods has received significant attention from synthetic chemists because the C─S bonds widely occurs in many important drugs and natural biological compounds. In recent years, photochemical organic conversion promoted by visible light has attracted the interest of many organic chemists. Compared with the traditional methods, visible light as the photoredox catalysis of renewable energy has been proved to be a mild and powerful tool that can promote the activation of organic molecules through the single electron transfer process. Therefore, this strategy has been widely applied in the formation of C─C and C─heteroatom bonds. This article reviews the research results on the formation of carbon sulfur bond promoted by organic photocatalyst Eosin Y under visible light in recent years, and discusses representative examples and reaction mechanisms.