Pd Nanoparticles Immobilized on Nanosilica Triazine Dendritic Polymer: A Reusable Catalyst for the Synthesis of Mono-, Di-, and Trialkynylaromatics by Sonogashira Cross-Coupling in Water
作者:Amir Landarani Isfahani、Iraj Mohammadpoor-Baltork、Valiollah Mirkhani、Ahmad R. Khosropour、Majid Moghadam、Shahram Tangestaninejad
DOI:10.1002/ejoc.201402503
日期:2014.9
Palladium nanoparticles immobilized on nano-silica triazine dendritic polymer (Pdnp-nSTDP) was found to be a highly effective catalyst for the Sonogashira cross-coupling of aryl halides (iodides, bromides, and chlorides) with aromatic and aliphatic terminal alkynes. This reaction was best performed in water as a green solvent in the presence of just 0.01 mol-% of the catalyst at room temperature. Efficient
发现固定在纳米二氧化硅三嗪树枝状聚合物 (Pdnp-nSTDP) 上的钯纳米粒子是芳基卤化物(碘化物、溴化物和氯化物)与芳族和脂族末端炔烃 Sonogashira 交叉偶联的高效催化剂。在室温下,在仅 0.01 摩尔%的催化剂存在下,该反应最好在作为绿色溶剂的水中进行。在该催化体系的存在下,通过二卤和三卤芳烃与末端炔烃的 Sonogashira 交叉偶联,还实现了具有苯、吡啶或嘧啶中心核的 V 形和星形多炔化分子的有效合成。Pdnp-nSTDP 催化剂很容易回收和重复使用多次,而不会显着降低反应性。