Cyclofunctionalization of unsaturated alcohols,phenols,acids,and sulfonamides with 1-benzene-sulfinyl piperidine and trifluoromethanesulfonic anhydride

摘要

The combination of a benzenesulfinamide,trifluoromethanesulfonic anhydride,and hunig's base brings about the cyclofunctionalization of unsaturated alcohols,phenols,acids,and sulfonamides to give the corresponding alpha-phenylsulfanylmethyl cyclic ethers,lactones and sulfonamides,respectively.In an unanticipated twist the product are isolated at the sulfur (II)oxidation state denoting an overall reduction in the oxidation state of the sulfur based electrophile in the course of the reaction.