Photoinduced Deoxygenative Borylations of Aliphatic Alcohols

Abstract

Abstract A photochemical method for converting aliphatic alcohols into boronic esters is described. Preactivation of the alcohol as a 2‐iodophenyl‐thionocarbonate enables a novel Barton–McCombie‐type radical deoxygenation that proceeds efficiently with visible light irradiation and without the requirement for a photocatalyst, a radical initiator, or tin or silicon hydrides. The resultant alkyl radical is intercepted by bis(catecholato)diboron, furnishing boronic esters from a diverse range of structurally complex alcohols.