REDUCTION OF SULFONIC ACIDS WITH TRIPHENYLPHOSPHINE-DIARYL DISULFIDE SYSTEM.

Article abstract of DOI:10.1246/bcsj.57.232

Diaryl disulfides are effective catalysts to reduce arenesulfonic acids with triphenylphosphine to the corresponding arenethiols in good yields, while alkanesulfonic acids are transferred into the corresponding alkyl aryl sulfides. Arenesulfonic acids bearing electron-donating substituents can be reduced more readily than those having electron-withdrawing substituents, while diaryl disulfides bearing electron-withdrawing substituents are more effective catalysts than diaryl disulfides with electron-donating ring substituents.