Three-component assembly of 5-halo-1,2,3-triazoles via aerobic oxidative halogenation
作者:Lingjun Li、Guoliang Hao、Anlian Zhu、Sangui Liu、Guisheng Zhang
DOI:10.1016/j.tetlet.2013.08.089
日期:2013.11
An effective synthetic protocol for 5-halo-1,2,3-triazoles was developed by novel TBDMSCI (tert-butyldi-methylsily1 chloride)-activated aerobic oxidative halogenations in this Letter. TBDMSCI, for the first time, was found to activate aerobic oxidation of CuX to produce X-2 with Cu+ which then could effectively promote one-pot syntheses of 5-halo-1,2,3-triazole from alkyne, azide, and CuX (X = I, Br) under O-2 atmosphere at room temperature. The advantages in this method include inexpensive and green O-2 as oxidant, use of mild and non-oxidative additive, and wide scope of substrates. (C) 2013 Elsevier Ltd. All rights reserved.