A new copper-catalyzed oxysulfenylation reaction of enolates with sodium sulfinates has been disclosed. A series of sulfenylated heterocycles including four- and seven-membered cyclic ether were obtained in mild to good yields. This reaction is proposed to go through a radical process, and the sulfur radical (RS•) may be a reactive species.
Intramoleculer arylsulphoetherificatiom and lactonization of unsaturated alcohols and carboxylic acids initiated by anodic oxidation of disulphides
作者:Sabine Töteberg-Kaulen、Eberhard Steckhan
DOI:10.1016/s0040-4020(01)86141-x
日期:1988.1
disulphides. The reaction can either be initiated by indirect electrochemical oxidation of diphenyldisulphide using bromide as redox catalyst or preferably by direct anodic oxidation of bis(4-methoxyphenyl) disulphide. 5- and 6-membered thioaryl substituted ethers and lactones thus may be generated starting preferably from mono or disubatituted alkenols and alkenoic acids. The reaction occurs as a trans-addition