Chemoselective N-Acylation of Amines with Acylsilanes under Aqueous Acidic Conditions.

We report a facile method for forming amide bonds between acylsilanes and a wide range of amines in the presence of a mild chlorinating agent under aqueous acidic conditions. The reaction is highly chemoselective, as exemplified by the late-stage modification of a panel of approved drugs and natural products containing reactive functionalities.