Nanoscrystalline CuO: Synthesis and application as an efficient catalyst for the preparation of 1,2,3-triazole acyclic nucleosides via 1,3-dipolar cycloaddition
作者:Hanane Elayadi、Mustapha Ait Ali、Ahmad Mehdi、Hasan Bihi Lazrek
DOI:10.1016/j.catcom.2012.05.016
日期:2012.9
average diameter range of 2.5–3.7 nm were examined as catalysts for the 1,3-dipolar cycloadditions of organic azides to terminal alkynes. The material was successfully synthesized at room temperature from metallic copper powder by a facile solution-phase method in the presence of nitric acid, sodium hydroxide (NaOH) and ethylene glycol (EG) as growth-directing agent. The crystallinity, purity, morphology
研究了平均直径范围为2.5-3.7 nm的纳米线CuO颗粒作为有机叠氮化物向末端炔烃的1,3-偶极环加成反应的催化剂。该材料是在硝酸,氢氧化钠(NaOH)和乙二醇(EG)作为生长导向剂的存在下,通过一种简便的溶液相方法在室温下由金属铜粉成功合成的。制备的纳米线的结晶度,纯度,形态,比表面积和结构特征通过粉末X射线衍射,Brunauer-Emmett-Teller(BET)方法和高透射电子显微镜进行了表征。在温和的反应条件下,将有机叠氮化物加到末端炔烃中可得到1,4-二取代的1,2,3-三唑作为单一的区域异构体,并具有良好的收率和催化剂的可重复使用性。通过各种有机叠氮化物通过1,3-偶极环加成反应的末端炔烃的点击反应方案,可以高产率地进行1,2,3-三唑无环核苷的区域选择性合成。然后,我们启动了一锅串联[3 + 2]环加成反应,在该反应中,苄基氯化物与炔丙基衍生物和叠氮化钠在CuO纳米颗粒作为催化剂的存在下反应。