Free-Radical Selenosulfonation of Vinylcyclopropanes, a Cyclopropylidene, and Cyclopropylacetylene. Relative Rates of Chain-Transfer, Ring-Opening, and Inversion in Radical Intermediates

Article abstract of DOI:10.1021/jo00262a028

The free-radical selenosulfonation of vinylcyclopropanes 4a-e and cyclopropylidene 9 was accompanied by ring-opening to afford 1,5- and 1,3-adducts 7a-e and 11, respectively, whereas cyclopropylacetylene (13) gave predominantly 1,2-addition to afford 15.T