Synthesis of 1,4-Disubstituted 1,2,3-Triazoles from Aromatic a-Bromoketones, Sodium Azide and Terminal Acetylenes via Cu/Cu(OTf)2-catalyzed Click Reaction under Microwave Irradiation
Magnetic nano-Fe<sub>3</sub>O<sub>4</sub>@TiO<sub>2</sub>/Cu<sub>2</sub>O core–shell composite: an efficient novel catalyst for the regioselective synthesis of 1,2,3-triazoles using a click reaction
作者:Firouzeh Nemati、Majid M. Heravi、Ali Elhampour
DOI:10.1039/c5ra06810j
日期:——
A magneticnano-Fe3O4@TiO2/Cu2Ocore–shellcomposite, optimized for the loading amount of Cu2O, was successfully prepared and fully characterized by analyzing FT-IR, XRD, XPS, FEG-SEM, EDS, and VSM data. The catalytic activity of the nano-Fe3O4@TiO2/Cu2Ocore–shellcomposite was examined in a classical one-pot and three-component reaction of terminal alkynes, benzyl halides, and sodium azide in water
通过对FT-IR,XRD,XPS,FEG-SEM进行分析,成功制备了磁性纳米Fe 3 O 4 @TiO 2 / Cu 2 O核壳复合材料,并针对Cu 2 O的负载量进行了优化。EDS和VSM数据。纳米Fe 3 O 4 @TiO 2 / Cu 2的催化活性在末端炔烃,苄基卤化物和叠氮化钠在水中的经典一锅和三组分反应中检查了O核壳复合物,观察到反应进展顺利,并以高区域选择性高收率完成。常规上使用外磁体回收催化剂,并至少连续五次重复使用而没有明显的活性损失。
Green and Facile Synthesis of 1,4-Disubstituted 1,2,3-Triazoles via a Click Reaction of &#945;-Bromo Ketones, [bmim]N<sub>3</sub> and Terminal Acetylenes
An efficient and green one pot method is reported for regioselective synthesis of 1,4-disubstituted 1,2,3-
triazoles. In this method, β-ketoazides are generated via in situ reaction between α-bromo ketones and 1-butyl-3-
methylimidazolium azide [bmim]N3 in aqueous ethanol and reacted with terminal acetylenes using Cu-CuSO4 at room
temperature to afford 1,4-disubstituted 1,2,3-triazoles.