Efficient solvent-free in situ tin-mediated homoallylation reactions

Various carbonyl compounds were converted to their corresponding homoallylic alcohols under ultrasonic irradiation and solvent free conditions, in the presence of metallic Sn and excess allyl bromide. Diallyltin(IV) dibromide was identified as the reactive species, with several allyl tin(II/IV) species being detected in the organic extracts of the reactions.