Neutral Sulfur Nucleophiles: Synthesis of Thioethers and Thioesters by Substitution Reactions of N-Heterocyclic Carbene Boryl Sulfides and Thioamides
作者:Xiangcheng Pan、Dennis P. Curran
DOI:10.1021/ol5010164
日期:2014.5.16
Newly discovered boryl sulfides and N-borylthioamides are shown to serve as neutral sources of sulfur nucleophiles in substitutions reactions. For example, heating of diMe-Imd-BH(SPh)2 with benzyl bromides, primary bromides, or acid chlorides provides the corresponding thioethers or thioesters in high yields. Likewise, N-phenyltetrazole thioethers/esters are made from a readily available N-borylthionotetrazole
已显示新发现的硼烷基硫化物和N-硼烷基硫代酰胺可在取代反应中用作硫亲核试剂的中性来源。例如,将diMe-Imd-BH(SPh)2与苄基溴化物,伯溴化物或酰氯一起加热可提供高收率的相应硫醚或硫酯。同样地,Ñ -phenyltetrazole硫醚/酯由容易获得的制造Ñ -borylthionotetrazole。可以将硼烷基硫化物的形成及其向前的亲核取代反应向下进行一锅反应,该反应的成分为NHC-硼烷(NHC-BH 3),二硫化物和亲电试剂。