Oxidative nucleophilic aromatic amination of nitrobenzenes
作者:V. V. Khutorianskyi、M. Sonawane、M. Pošta、B. Klepetářová、P. Beier
DOI:10.1039/c6cc02235a
日期:——
Regioselective oxidative nucleophilicsubstitution of aromatic hydrogen of substitutednitrobenzenes with lithium salts of arylamines is described. The method allows the synthesis of a variety of N-aryl-2-nitroanilines.
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.