Abstract Carbon cantered radicals derived from reactions of halides 3–5 with Bu 3 SnH in the presence of AIBN havebeentrapped by diphenylvinylphosphine oxide 2 giving the addition products 6–8 in high yields. Free radical addition to 2 employing the Barton methodology gave lower yields. The use of chiral (racemic:) vinylphosphine oxides allowed a stereoselective radical addition with a diastercomeric ratio as high as 9: 1 for ...
