Oxidation of Unsymmetrical Disulfide and Thiosulfinic<i>S</i>-Esters with Peroxy Acids. Search for Formation of α-Disulfoxide as An Intermediate in the Electrophilic Oxidation of Thiosulfinic<i>S</i>-Ester
作者:Shigeru Oae、Toshikazu Takata、Yong Hae Kim
DOI:10.1246/bcsj.55.2484
日期:1982.8
Oxidation of an unsymmetrical disulfide, methyl phenyldisulfide, with peroxyacids takes place mainly at more electron-rich sulfur atom to form thiosulfinic S-ester at the first stage, while oxida...
Selective Oxidation of Unsymmetrical Thiosulfinic<i>S</i>-Esters to the Corresponding Thiosulfonic<i>S</i>-Esters with NaIO<sub>4</sub>
作者:Toshikazu Takata、Yong Hae Kim、Shigeru Oae
DOI:10.1246/bcsj.54.1443
日期:1981.5
Unsymmetrical thiosulfinic S-esters were oxidized with sodium metaperiodate in aqueous media to the corresponding unsymmetrical thiosulfonic S-esters nearly quantitatively. The oxidation was accelerated by addition of a catalytic amount of inorganic and organic acids or halogen. Sulfinic esters were produced competitively along with the thiosulfonic S-esters in the oxidation of thiosulfinic S-esters in aqueous alcohol. However, unsymmetrical disulfides were not oxidized selectively to the corresponding unsymmetrical thiosulfonic S-esters but a mixture of both symmetrical and unsymmetrical thiosulfonic testers was obtained.