Recent Advances for the Synthesis of Dihydroquinolin-2(1H)-ones via Catalytic Annulation of α,β-Unsaturated N-Arylamides

Dihydroquinolin-2(1H)-ones (DHQOs) represent a class of valuable bioactive compounds with six-membered nitrogen-containing heterocyclic structures. The development simple, mild, and efficient synthetic methods has been widely considered by chemists. In this review, we have summarized series different strategies for the synthesis DHQOs via catalytic annulation α,β-unsaturated N-arylamides in past decade, including covering electrophilic cyclization, radical initiated photochemical cyclization reactions. Additionally, substrate scope mechanistic details are also discussed. This paper provides useful reference diverse methodologies DHQO.