Task specific onium salts (TSOSs) as efficient soluble supports for Zard radical addition to olefins

Task specific onium salts (TSOSs), that is, functionalised ammonium salts, have been used as soluble supports to carry out intermolecular radical additions of xanthates to olefins and functional group interconversions. This methodology provides results by far superior to those reported with other soluble supports and allows for very easy purifications of reaction products.