Under open-flask conditions in the presence of commercially available FeCl3·6H2O, N,N-disubstituted anilines can be converted into diversely functionalized benzidines with yields of up to 99%. Oxidative coupling was extended to N-monosubstituted anilines, and the method was applied to the efficient preparation of 6,6′-biquinoline. Mechanistic investigations have also been performed to explain the observed
Synthesis of N,N,N’,N’-tetraalkylbenzidines through oxidative coupling of N,N-dialkylarylamines induced by SbCl5
作者:Paola Vitale、Leonardo Di Nunno、Antonio Scilimati
DOI:10.3998/ark.5550190.0014.304
日期:——
The oxidativecoupling to 4,4'-N,N,N',N'-tetraalkylbenzidines is the main reaction observed during a study on the reactivity of N,N-dialkylanilines with SbCl 5. A possible reaction mechanism is presented and discussed in comparison with the N,N-dialkylanilines oxidativecoupling achieved with other Lewis acids.
Oxidative Coupling of<i>N</i>,<i>N</i>-Dialkylanilines Using Iodic Acid and Sodium Nitrite
作者:Sameerana N. Huddar、Ulhas S. Mahajan、Krishnacharya G. Akamanchi
DOI:10.1246/cl.2010.808
日期:2010.8.5
A new reagent system, a combination of iodic acid and sodium nitrite has been investigated for oxidative coupling of N,N-disubstituted anilines. A facile para-selective coupling occurs to give benz...
Synthesis of diversely functionalized symmetrical benzidines through electrochemical dehydrogenative cross-couplingreaction of two N,N-disubstituted anilines, is described. The reactions conducted under mild conditions with no oxidizing reagents and transition metal catalysts.