71491-44-6Relevant articles and documents
Synthesis of 1-aryl-5-nitrobenzotriazoles
Gornostaev,Bulgakova,Kalashnikova
, p. 1281 - 1284 (2014/01/17)
3-Aryl-1-(3-nitrophenyl)triazenes were obtained in the cyclization reaction of diazotized 3-nitroaniline with arylamines in the presence of dimethyl sulfoxide and potassium carbonate to give 1-aryl-5-nitrobenzotriazoles.
ACCES AUX DINITRO-2,4 DIARYLAMINES PAR SUBSTITUTION NUCLEOPHILE SNAr-LIMITES DE LA REACTION ET APPLICATION A LA SYNTHESE DE CYANOCARBAZOLES
Henichart, J. P.,Bernier J. L.,Vaccher, C.,Houssin, R.,Warin, V.,Baert, F.
, p. 3535 - 3542 (2007/10/02)
3-Cyanocarbazoles, key-intermediates in the total synthesis of pyrido carbazoles, have been obtained starting from easily available materials and involving the cyclization of diarylamines.The first step of the preparation consists in a SNAr reaction between a para substituted aniline and a chloro- (or bromo)-dinitrobenzene.This nucleophilic substitution has been found to be hindered by the steric effect of a methyl group, explained in terms of inhibition of resonance and confirmed by X-ray determination.