Metal‐free Photochemical Atom Transfer Radical Addition (ATRA) of BrCCl3 to Alkenes.

A simple, photochemical, and metal‐free protocol for the atom transfer radical addition (ATRA) of bromotrichloromethane onto various alkenes is described. Among a range of organic molecules, phenylglyoxylic acid proved to be the most suitable photoinitiator to promote a sustainable process for the addition of bromotrichloromethane to olefins. This photochemical atom transfer radical protocol can be expanded into a wide substrate scope of aliphatic olefins bearing various functional groups, leading to the corresponding products in good to excellent yields. [ABSTRACT FROM AUTHOR]