Copper Nanoparticles on Charcoal for Multicomponent Catalytic Synthesis of 1,2,3-Triazole Derivatives from Benzyl Halides or Alkyl Halides, Terminal Alkynes and Sodium Azide in Water as a “Green” Solvent
作者:Hashem Sharghi、Reza Khalifeh、Mohammad Mahdi Doroodmand
DOI:10.1002/adsc.200800612
日期:2009.1
A one-pot procedure for synthesis of 1,2,3-triazole derivatives via the three-component coupling (TCC) reaction between terminal alkynes, benzyl or alkyl halides, and sodium azide in the presences of 1 mol% nanoparticles copper/carbon (Cu/C) catalyst has been developed. The catalyst showed high catalytic activity and 1,4-regioselectivity for the [3+2] Huisgen cycloaddition in water as a “green” solvent
在1 mol%纳米粒子铜/碳存在下,通过末端炔烃,苄基或烷基卤化物和叠氮化钠之间的三组分偶联(TCC)反应,通过一锅法合成1,2,3-三唑衍生物的步骤已经开发出Cu / C)催化剂。该催化剂在水中作为“绿色”溶剂对[3 + 2] Huisgen环加成反应显示出高催化活性和1,4-区域选择性,在所有情况下均获得了良好或优异的收率。该程序消除了处理有机叠氮化物的需要,并且它们是就地产生的。该反应范围广,对于合成新的三唑氮杂冠醚和蒽醌衍生物特别实用。通过扫描电子显微镜(SEM),原子强迫显微镜(AFM),X射线衍射(XRD),电感耦合等离子体(ICP)分析和FT-IR实验技术对多相催化剂进行了全面表征。催化剂被循环十次而没有明显的活性损失。