N‐Arylamines Coupled with Aldehydes, Ketones, and Imines by Means of Photocatalytic Proton‐Coupled Electron Transfer

: A photoredox-catalyzed umpolung strategy for coupling reactions between aldehydes, ketones, imines, and N-arylamines is reported. These reactions proceed by a Bronsted acid-activated proton-coupled electron transfer pathway, and the protocol was used to synthesize a broad scope of 1,2-amino alcohols and vicinal diamines, both of which are common motifs in biologically active natural products, pharmaceutically active molecules, and ligands.