Elektrophile aromatische Verbindungen lassen sich mit Sulfenamiden in Gegenwart von Basen zu den entsprechenden aromatischen Aminen umsetzen.
亲电芳香族化合物可在碱存在下与亚磺酰胺一起转化为相应的芳香胺。
Nitroarylamines via the Vicarious Nucleophilic Substitution of Hydrogen: Amination, Alkylamination, and Arylamination of Nitroarenes with Sulfenamides
作者:Mieczysław Ma̧kosza、Maciej Białecki
DOI:10.1021/jo970582b
日期:1998.7.1
A new reaction of sulfenamides with electrophilic arenes under basic conditions is described. The sigma adducts formed from nitroarenes and the anions of sulfenamides undergo elimination of thiol to produce the corresponding o- and/or p-nitroanilines. This reaction is analogous to the known alkylation and hydroxylation of nitroarenes via the vicarious nucleophilic substitution of hydrogen (VNS). The reaction gives access to a wide range of substituted nitroanilines, nitronaphthylamines, and aminoheterocycles. By means of the reaction with N-alkryl- and N-arylsulfenamides, it is possible to obtain N-alkylnitroanilines and nitrodiarylamines. By varying the structure of sulfenamide and the reaction conditions, particularly the nature and concentration of the base, it is possible to control the orientation of amination.
Studies on the Oxidative SNH Amination of aromatic nitro compounds