Ligand- and Substrate-Controlled para C-H Borylation of Anilines at Room Temperature.

A new catalytic method for para borylation of unprotected anilines is described. The catalytic method is developed by designing a new type of ligand framework that enables para borylation at room temperature. We showed that whereas previously reported para borylation of 2-substituted anilines required multistep protection/deprotection sequences and a high reaction temperature, our method gives a straightforward solution for achieving para borylation without such protection/deprotection chemistry at room temperature.