Catalyst‐Free Photooxidative N‐Acylation of Azoles with Aldehydes

Abstract A catalyst‐free photochemical N‐acylation of azoles with aldehydes has been developed using inexpensive BrCCl 3 as the oxidant. This transition‐metal‐ and photocatalyst‐free amidation proceeded efficiently with a wide variety of substrates to give the corresponding N‐acylazoles, including for the late modification of pharmaceutically active molecules, and on a gram‐scale.