Pinacol Cross‐Coupling Promoted by an Aluminyl Anion
Andrea O’Reilly, Matthew J. Evans, Claire L. McMullin, J. Robin Fulton, Martyn P. Coles
Abstract
A simple sequential addition protocol for the reductive coupling of ketones and aldehydes by a potassium aluminyl grants access to unsymmetrical pinacolate derivatives. Isolation of an aluminium ketyl complex presents evidence for the accessibility of radical species. Product release from the aluminium centre was achieved using an iodosilane, forming the disilylated 1,2-diol and a neutral aluminium iodide, thereby demonstrating the steps required to generate a closed synthetic cycle for pinacol (cross) coupling at an aluminyl anion.
Topics & Concepts
PinacolKetylChemistryCoupling (piping)AluminiumCombinatorial chemistryDiolCoupling reactionIodideMedicinal chemistryCatalysisInorganic chemistryOrganic chemistryMaterials scienceRadicalMetallurgyCatalytic Cross-Coupling ReactionsRadical Photochemical ReactionsCatalytic C–H Functionalization Methods