Synthesis of α-Chloroboronic Esters via Photoredox-Catalyzed Chloro-Alkoxycarbonylation of Vinyl Boronic Esters.

α-Chloroboronic esters are a class of stable multifunctional molecules that show unique applications in pharmaceutical science and organic chemistry. Despite their apparent utility, the synthetic methods of these compounds remain limited. Herein, a novel strategy for the efficient synthesis of α-chloroboronic esters is developed via photoredox-catalyzed chloro-alkoxycarbonylation of vinyl boronic esters.