Radical Metal-Free Borylation of Aryl Iodides
Received: 21 March 2017
Accepted after revision: 02 May 2017
29 May 2017 (eFirst)
Published as part of the Special Topic Modern Strategies for Borylation in Synthesis
A simple metal-free borylation of aryl iodides mediated by a fluoride sp2–sp3 diboron adduct is described. The reaction conditions are compatible with various functional groups. Electronic effects of substituents do not affect the borylation while steric hindrance does. The reaction proceeds via a radical mechanism in which pyridine serves to stabilize the boryl radicals, generated in situ.