Immobilization of Porphyrinatocopper Nanoparticles onto Activated Multi-Walled Carbon Nanotubes and a Study of its Catalytic Activity as an Efficient Heterogeneous Catalyst for a Click Approach to the Three-Component Synthesis of 1,2,3-Triazoles in Water
作者:Hashem Sharghi、Mohammad Hassan Beyzavi、Afsaneh Safavi、Mohammad Mahdi Doroodmand、Reza Khalifeh
DOI:10.1002/adsc.200900353
日期:2009.10
An efficient, regioselective, one-pot and two-step synthesis of β-hydroxy 1,4-disubstituted 1,2,3-triazoles from a wide range of non-activated terminal alkynes and epoxides and sodium azide by way of a three-component click reaction using a catalytic amount of [meso-tetrakis(o-chlorophenyl)porphyrinato]copper(II) (5 mol%) in excellent isolated yields is described. The reactions were performed in water
一种有效的,区域选择性的,一锅又两步的合成方法,可通过多种非活化的末端炔烃和环氧化物以及叠氮化钠,通过三步反应合成β-羟基1,4-二取代的1,2,3-三唑部件点击反应使用[催化量内消旋-四(ø在良好的分离产率氯苯基)卟啉]铜(II)(5摩尔%)进行说明。该反应在室温下在无溶剂的情况下在水中作为绿色溶剂进行。通过在一个反应釜中进行两个反应步骤并仅在最后一步进行纯化,该程序不包括任何原位中间纯化生成的有机叠氮化物中间体,可显着提高总收率并缩短反应时间。为了从催化剂的回收和再利用中受益,通过将催化剂简单且成功地浸渍到活化的多壁碳纳米管(AMWCNT)上来制备新的非均相催化剂。通过粉末X射线衍射(XRD),透射电子显微镜(TEM),扫描电子显微镜(SEM),原子强迫显微镜(AFM)和热重分析(TG)分析来表征非均相催化剂,以估算氮的吸附量,以及拉曼光谱和FT-IR光谱。十个连续循环后的浸出实验