A route to benzylic arylsulfoxides from β-ketosulfoxides
作者:Meng-Yang Chang、Yu-Chieh Cheng、Chieh-Kai Chan
DOI:10.1016/j.tet.2016.05.038
日期:2016.7
The K2CO3-mediated benzylation of β-ketosulfoxides 4 with 2.0 equiv of benzylic halides 5 affords benzylic arylsulfoxides 6 in moderate yields along with trace amounts of chalcones 7. The products 6 are assumed to form in situ intermediates of sulfenate anions from β-ketosulfoxides which are commonly involved in carbon–sulfur bond formation. A plausible mechanism has been proposed.
用2当量的苄基卤化物5进行的K 2 CO 3介导的β-酮亚砜4的苄基化反应可中等产率地得到苄基芳基亚砜6以及痕量的查耳酮7。假定产物6原位形成了β-酮亚砜中的亚硫酸根阴离子的中间体,这些中间体通常参与碳-硫键的形成。已经提出了一种合理的机制。
Equilibrium Acidities of Some Sulfones and Sulfoxides in Tetrahydrofuran [1]
作者:Andrew Streitwieser、George Peng Wang、Daniel A Bors
DOI:10.1016/s0040-4020(97)00351-7
日期:1997.7
Ion pair acidities are reported in tetrahydrofuran (THF) solution for the lithium and cesium salts of several sulfones and one sulfoxide. These salts are shown to be monomeric in the THF solutions studied. Thermodynamic constants are reported for several salts. The results and some conductivity studies show that both the lithium and cesium salts are contact ion pairs in THF. Because of ion association