Dimeric Potassium Amide-Catalyzed α-Alkylation of Benzyl Sulfides and 1,3-Dithianes
作者:Yu-Feng Liu、Lei Zheng、Dan-Dan Zhai、Xiang-Yu Zhang、Bing-Tao Guan
DOI:10.1021/acs.orglett.9b01994
日期:2019.7.5
The first catalytic α-alkylation reaction of benzyl sulfides and 1,3-dithianes with styrenes and conjugated dienes was developed under mild conditions by using a readily available Brønsted base potassium bis(trimethylsilyl)amide (KHMDS) as catalyst. The reaction displayed good functional group tolerance, high efficiency, and excellent chemoselectivity. A series of desired alkylation products were obtained
苄基硫醚和1,3-二硫杂环丁烷与苯乙烯和共轭二烯的第一个催化α-烷基化反应是在温和条件下通过使用容易获得的布朗斯台德双(三甲基甲硅烷基)酰胺基钾(KHMDS)催化剂开发的。该反应显示出良好的官能团耐受性,高效率和优异的化学选择性。以良好或高收率获得了一系列所需的烷基化产物。初步的机理研究表明,两个酰胺化钾催化剂分子在催化循环中共同起作用。