Reactions of episulfonium ions from the sulfenylation of alkenes and from phenylthio migration: Kinetic vs thermodynamic control
摘要:
The formation of the same cyclic ethers from the sulfenylation of unsaturated alcohols and from acid catalysed phenylthio migration on diols via the same intermediate can be explained by kinetic and thermodynamic control. Both reactions are synthetically useful. A result from a previous Tetrahedron Letter is corrected.
Phenylsulfenyl chloride/N,N-diisopropylethylamine: A useful reagent for cyclic ether formation (sulfenyletherification)
作者:Sudersan M Tuladhar、Alex G Fallis
DOI:10.1016/s0040-4039(00)95772-1
日期:1987.1
A general method for the formation of cyclicethers and lactones is described. The procedure employs phenylsulfenyl chloride and N,N-diisopropylethylamine to generate an episulfonium ion intermediate from which the cyclic products arise by internal nucleophilic displacement.