Palladium-Catalyzed Synthesis of 2-Aryl-2H-Benzotriazoles from Azoarenes and TMSN3
摘要:
Substrate-directed ortho C-H amination of azoarenes using TMSN3 as the source of nitrogen leading to the synthesis of 2-aryl-2H-benzotriazoles has been accomplished with the help of Pd/TBHP combinations. An intermolecular o-azidation (C-N bond formation) followed by an intramolecular N-N bond formation via nucleophilic attack of one of the azo nitrogen onto the o-azide nitrogen leads to cyclization with the expulsion of N-2.
A new approach has been established for Rh(iii)-catalyzed direct aza oxidative cyclization of non-prefunctionalized azobenzenes to provide 2-aryl-2H-benzotriazoles in good yields.
Synthesis of 2-Aryl-2<i>H</i>-benzotrizoles from Azobenzenes and <i>N</i>-Sulfonyl Azides through Sequential Rhodium-Catalyzed Amidation and Oxidation in One Pot
作者:Taekyu Ryu、Jiae Min、Wonseok Choi、Woo Hyung Jeon、Phil Ho Lee
DOI:10.1021/ol501250t
日期:2014.6.6
An efficient synthetic method of 2-aryl-2H-benzotriazoles from nonprefunctionalized azobenzenes and N-sulfonyl azides via sequential Rh-catalyzed amidation (C-N bond formation) and oxidation (N-N bond formation) with PhI(OAc)(2) in one pot is reported.
Dal Monte; Veggetti, Bollettino Scientifico della Facolta di Chimica Industriale di Bologna, 1958, vol. 16, p. 1
作者:Dal Monte、Veggetti
DOI:——
日期:——
Palladium-Catalyzed Synthesis of 2-Aryl-<i>2H</i>-Benzotriazoles from Azoarenes and TMSN<sub>3</sub>
作者:Nilufa Khatun、Anju Modi、Wajid Ali、Bhisma K. Patel
DOI:10.1021/acs.joc.5b01706
日期:2015.10.2
Substrate-directed ortho C-H amination of azoarenes using TMSN3 as the source of nitrogen leading to the synthesis of 2-aryl-2H-benzotriazoles has been accomplished with the help of Pd/TBHP combinations. An intermolecular o-azidation (C-N bond formation) followed by an intramolecular N-N bond formation via nucleophilic attack of one of the azo nitrogen onto the o-azide nitrogen leads to cyclization with the expulsion of N-2.