Metal-Free Electrophilic Alkynylation of Sulfenate Anions with Ethynylbenziodoxolone Reagents
作者:Stephanie G. E. Amos、Stefano Nicolai、Alec Gagnebin、Franck Le Vaillant、Jerome Waser
DOI:10.1021/acs.joc.9b00050
日期:2019.3.15
Alkynyl sulfoxides are important building blocks with a unique reactivity in organic chemistry, but only a few reliable methods have been reported to synthesize them. A novel route to access alkynyl sulfoxides is reported herein by using ethynyl benziodoxolone (EBX) reagents to trap sulfenate anions generated in situ, via a retro-Michael reaction. The reaction takes place under metal-free and mild
炔基亚砜是重要的组成部分,在有机化学中具有独特的反应活性,但仅报道了几种可靠的合成方法。本文报道了通过使用乙炔基苯并恶唑啉酮(EBX)试剂通过逆迈克尔反应捕获原位产生的亚磺酸根阴离子来获得炔基亚砜的新途径。该反应在无金属和温和的条件下进行。它与芳基,杂芳基和烷基亚砜相容,收率高达90%。期望这种对炔基亚砜的实际接触将促进这些有用的结构单元在有机合成中的应用。