Selenosulfonation of Conjugated Enynes and the Enyne Equivalent 1,4-Dichloro-2-butyne. Preparation of Sulfonyl-Substituted Allenic Alcohols and Dienes Using Sigmatropic Rearrangements and Organocuprate Additions

Article abstract of DOI:10.1021/jo00302a024

Conjugated enynes undergo free-radical selenosulfonation under either photochemical or thermal conditions with Se-phenyl p-tolueneselenosulfonate (1).Addition to the triple bond occurred preferentially with enynes having an acetylenic terminus (6-8) affor