Electrophilic substitutions with the electrogenerated sulfenium cation R1-S+
作者:Quang Tho Do、Driss Elothmani、Georges Le Guillanton
DOI:10.1016/s0040-4039(98)00871-5
日期:1998.6
The sulfenium cation R1-S+ electrogenerated by oxidation of organic disulfides, reacts with phenols, aromatic ethers and ketones bearing an hydrogen atom in α position, to give alkyl (aryl) sulfanyl compounds.
Metal-Free Oxidative Esterification of Ketones and Potassium Xanthates: Selective Synthesis of α-Ketoesters and Esters
作者:Xianglin Luo、Runfa He、Qiang Liu、Yanping Gao、Jingqing Li、Xiuwen Chen、Zhongzhi Zhu、Yubing Huang、Yibiao Li
DOI:10.1021/acs.joc.9b03272
日期:2020.4.17
A novel and efficient oxidative esterification for the selectivesynthesis of α-ketoesters and esters has been developed under metal-free conditions. In the protocol, various α-ketoesters and esters are available in high yields from commercially available ketones and potassium xanthates. Mechanistic studies have proven that potassium xanthate not only promotes oxidative esterification but also provides
Reduction of α-methylthio and α-phenylthio ketones 1 with L-Selectride gave syn-alcohols 2 in high stereoselectivity except when R1 was cyclohexyl group, while reduction with Zn(BH4)2 gave the isomeric anti-alcohols 3 provided R3 was methyl group.