Pd-Catalyzed C−H Activation/C−N Bond Formation: A New Route to 1-Aryl-1H-benzotriazoles
摘要:
A method for the C-H activation of aryl triazene compounds followed by intramolecular amination is described. It involves the use of a catalytic amount of Pd(OAc)(2) that efficiently effects the cyclization to provide 1-aryl-1H-benzotriazoles at moderate temperature.
Selective Synthesis of<i>N</i>-H and<i>N</i>-Aryl Benzotriazoles by the [3 + 2] Annulation of Sodium Azide with Arynes
作者:Avishek Guin、Rahul N. Gaykar、Subrata Bhattacharjee、Akkattu T. Biju
DOI:10.1021/acs.joc.9b02198
日期:2019.10.4
arynes generated from2-(trimethylsilyl)aryltriflates resulting in the transition-metal-free synthesis of N-H and N-aryl benzotriazoles has been demonstrated. Using CsF as the fluoride source in CH3CN, the N-H benzotriazoles are formed in high selectivity instead of the expected azidobenzene. Interestingly, N-aryl benzotriazoles are formed using KF and THF as solvent in an open-flask reaction. Moreover,
A method for the C-H activation of aryl triazene compounds followed by intramolecular amination is described. It involves the use of a catalytic amount of Pd(OAc)(2) that efficiently effects the cyclization to provide 1-aryl-1H-benzotriazoles at moderate temperature.