Abstract

Carbon cantered radicals derived from reactions of halides 3–5 with Bu3SnH 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 mesitylmethylvinylphosphine oxide 1.

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