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 terminalalkynes. 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
Efficient Sonogashira and Suzuki-Miyaura coupling reaction catalyzed by Pd-Nanoparticles
作者:KISHOR E BALSANE、SURESH S SHENDAGE、JAYASHREE M NAGARKAR
DOI:10.1007/s12039-015-0796-z
日期:2015.3
cross-coupling reaction. Benzenediazoniumsalts were used as alternative to aromatic halide. The developed protocol offers recyclability, easy workups with short reaction time and good-to-excellent product yield. The Pd nano particles were electrochemically deposited on nafion-graphene. They showed excellent catalytic activity towards Sonogashira and Suzuki-Miyaura crosscoupling reaction. Benzenediazonium salts
Efficient One-Pot Synthesis of the Unsymmetrical Diarylalkynes from Two Different Aryl Bromides and Propiolic Acid by Using Pd(PPh<sub>3</sub>)<sub>4</sub>Catalyst
作者:Kyungho Park、Wonyoung Kim、Sunwoo Lee
DOI:10.5012/bkcs.2013.34.10.2859
日期:2013.10.20
propiolic acid with aryl bromides, which is cost effective, unlike aryliodides, despite the low reactivity by using sulfonated XPhos as a ligand. Goossen reported the method for the synthesis of unsymmetrical diarylalkynes with the combination of two different aryl bromides in the presence of SPhos. Recently, we reported that the Pd(PPh3)4 catalyzed a selective Sonogashira reaction with aryl bromides at low
Cu(I) catalysts [Cu(L1−4)Cl(PPh3)] where L1−4 = condensed product of 2-(1-phenylhydrazinyl)-pyridine with different benzaldehydes} were synthesized, characterized by 1H, 31P NMR, UV–Vis and IR techniques. Complex 2 structure was authenticated by single crystal X-ray method. Different electron donating and withdrawing substituents are present in the ligand frame of Cu(I) catalysts and their role on
合成了Cu(I)催化剂[Cu(L 1-4)Cl(PPh 3)],其中L 1-4 = 2-(1-苯基肼基)-吡啶与不同的苯甲醛的缩合物},其特征在于1 H,31 P NMR,UV-Vis和IR技术。复合物2的结构通过单晶X射线法进行了鉴定。Cu(I)催化剂的配体框架中存在不同的给电子和吸电子取代基,并研究了它们在Sonogashira反应中的作用。发现偶联反应催化剂的效率顺序为2 > 1 > 3 > 4清楚地表明存在于配体框架中的取代基的作用对于有效催化Sonogashira反应是有用的。使用1 H和13 C NMR表征产物。