An aerobic metal-free, visible-light-induced regioselective thiolation of phenols with thiophenols is reported. The cross-coupling protocol exhibits great functional group tolerance and high regioselectivity. Mechanistic studies reveal that the disulfide radical cation plays a crucial role in the visible-light catalysis of aerobic thiolation. Simply controlling the equivalent ratio of substrates enables
Use of carbohydrates in the preparation of optically active sulphoxides
作者:Damon D. Ridley、Mary A. Smal
DOI:10.1039/c39810000505
日期:——
The diastereomeric sulphinate esters formed from arenesulphinyl chlorides and 1,2:5,6-di-O-cyclo-hexylidene-D-glucofuranose afford opticallyactivesulphoxides on treatment with Grignard reagents.
Transition-Metal-Free Arylations of In-Situ Generated Sulfenates with Diaryliodonium Salts
作者:Hao Yu、Zhen Li、Carsten Bolm
DOI:10.1021/acs.orglett.8b03046
日期:2018.11.16
A transition-metal-free arylation of sulfenate anions generated from β-sulfinyl esters with diaryliodoniumsalts was developed. In this process, a new C–S bond is formed under mild reaction conditions providing a wide range of S,S-diaryl and S-alkyl S-aryl sulfoxides.