Visible‐Light‐Induced Deaminative Alkylation for the Synthesis of Chroman‐4‐one Derivatives via EDA Complexes

A visible‐light‐mediated synthesis of 3‐alkyl‐ substituted chroman‐4‐one derivatives via deaminative alkylation of amino acid derived Katritzky salts and tandem cyclization with o‐(allyloxy)arylaldehydes has been developed. This approach exhibits a certain functional‐group compatibility with 31 examples and affords desired products in yields of 16% to 88%. Mechanistic research results suggests that the formation of EDA complexes between Katritzky salts and a base is the main reason for initiating the reaction.