Imination of Sulfides and Sulfoxides with Sulfonylimino-λ3-Bromane under Mild, Metal-Free Conditions
作者:Masahito Ochiai、Masao Naito、Kazunori Miyamoto、Satoko Hayashi、Waro Nakanishi
DOI:10.1002/chem.201000759
日期:2010.8.2
Exposure of sulfides and sulfoxides to trifluoromethanesulfonylimino(aryl)‐λ3‐bromane in dichloromethane at 0 °C results in a facile transfer of the sulfonylimino group to sulfur atoms and affords N‐triflylsulfilimines and ‐sulfoximines in high yields under transition‐metal‐free conditions. Imination of (R)‐methyl p‐tolyl sulfoxide proceeded with predominant retention of configuration at the stereogenic
硫化物和亚砜的暴露于trifluoromethanesulfonylimino(芳基)-λ 3 -bromane在二氯甲烷中在0℃下导致磺酰基的容易转移到硫原子和得到Ñ -triflylsulfilimines和- -自由过渡金属下以高产率亚磺酰亚胺情况。(R)-甲基对甲苯基亚砜的胺化主要在构型硫中心保留构型。Hammett图提供了对位的-0.58的ρ值-取代的硫代苯甲醚和-0.49等价的亚砜,这表明过渡态的硫化物和亚砜的硫原子上会积累正电荷。计算表明在磺酰-λ的带负电荷的氮原子的双分子亲核取代机理3 -bromane,它涉及一硫化物的从相反侧与溴(III)进攻。