Recent Developments on Carbon‐Heteroatom Coupling in Aryl and Heteroaryl Rings Under Visible Light Irradiation

Visible light photocatalysis has been appeared as a powerful sustainable tool for constructing carbon‐heteroatom bonds in recent years. Various transition metal‐based catalysts, organocatalysts, and heterogeneous semiconductors have been employed as single electron transfer agent during excitation under visible light to perform carbon‐heteroatom couplings in the aryl and heteroaryl rings. Few reaction paths were also developed recently which produced such compounds under visible light irradiation in absence of any external photocatalysts. This review summarizes the recent developments for the carbon‐heteroatom cross‐couplings in aryl and heteroaryl rings under visible light irradiation with proposed mechanistic paths under both presence and absence of external photocatalysts for the synthesis of important organic molecules in diverse fields.