Investigations into the Pd-catalysed cross-coupling of phenylacetylene with aryl chlorides: simple one-pot procedure and the effect of ZnCl2 co-catalysisElectronic supplementary information (ESI) available: general experimental, procedure for cross-coupling experiments and characterization data for products. See http://www.rsc.org/suppdata/cc/b2/b200453b/
Phosphane-Free Copper-Catalyzed Decarboxylative Coupling of Alkynyl Carboxylic Acids with Aryl Halides under Aerobic Conditions
作者:Delin Pan、Chun Zhang、Shengtao Ding、Ning Jiao
DOI:10.1002/ejoc.201100659
日期:2011.7.18
A phosphane-free copper-catalyzed decarboxylativecross-coupling reaction of alkynyl carboxylicacids with aryl halides was developed. CuBr (1–5 mol-%) was used as a catalyst in the presence of a β-diketone ligand in air. The reactions of aryliodides were conducted in the absence of a Pd catalyst. The ligand plays a key role in this kind of copper catalysis. NaNO2 was disclosed to efficiently improve
Diphenylphosphorylated PEG (DPPPEG) as a new support for generation of nano-Pd(0) as catalyst for carbon–carbon bond formation via copper-free Sonogashira and homocoupling reactions of aryl halides in PEG
作者:Nasser Iranpoor、Habib Firouzabadi、Asma Riazi
DOI:10.1007/s13738-014-0469-8
日期:2015.1
reaction mixture and centrifugations. Full characterization of the nano-Pd(0)/DPPPEG200 was performed by XRD spectra, UV–Vis spectra, and also by TEM image. This nano-complex was used as an efficient catalyst for copper-free Sonogashira and homocoupling reactions of aryl halides. The sonogashira reaction of aryl halides was conducted at 80 °C in PEG. However, the homocoupling reaction was performed at 100 °C
pre-catalyst. This nano catalyst was used for the efficientcopper-freeSonogashirareaction of aryl halides in PEG-200 as a solvent. The nano Pd(0) that can be used as pre-prepared or as in situ-generated catalyst exhibited excellent reactivity and stability in the Sonogashiracross-couplingreactions with different aryl iodides, bromides, and also chlorides. This heterogeneous catalyst can be easily recovered
二氧化硅二苯基次膦酸酯(SDPP)用作固体载体,用于从作为前催化剂的Pd II生成纳米SDPP / Pd(0)。该纳米催化剂用于在溶剂PEG-200中有效地进行了芳基卤化物的无铜Sonogashira反应。可以用作预制催化剂或原位生成的催化剂的纳米Pd(0)在Sonogashira与不同的芳基碘化物,溴化物以及氯化物的交叉偶联反应中表现出出色的反应性和稳定性。这种非均相催化剂可以很容易地回收并在几次运行中重复使用。可以将PEG用作溶剂和将K 2 CO 3用作无机碱以及反应的非均质性质视为该反应的绿色条件。
Palladium nanoparticles supported on agarose-functionalized magnetic nanoparticles of Fe<sub>3</sub>O<sub>4</sub> as a recyclable catalyst for C–C bond formation via Suzuki–Miyaura, Heck–Mizoroki and Sonogashira–Hagihara coupling reactions
Palladium nanoparticles supported on agarose functionalized Fe3O4 catalyzed C–C bond formation reactions.
钯纳米颗粒负载在琼脂功能化的Fe3O4上,催化了C-C键形成反应。
Recyclable palladium-catalyzed Sonogashira–Hagihara coupling of aryl halides using 2-aminophenyl diphenylphosphinite ligand in neat water under copper-free condition
An efficient heterogeneous copper-freeSonogashira–Hagiharacoupling reaction was performed in the presence of 2-aminophenyl diphenylphosphinite (L) as a ligand, Pd(OAc)2 and a base in neat water at 25–95 °C. By this protocol, different aryl halides (Cl, Br, I) were reacted with phenylacetylene in good to excellent yields. The catalyst was recycled for the reaction of bromobenzene with phenylacetylene