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。