Catalytic Efficiency of a New Tridentate Ferrocenyl Phosphine Auxiliary: Sonogashira Cross-Coupling Reactions of Alkynes with Aryl Bromides and Chlorides at Low Catalyst Loadings of 10<sup>-</sup><sup>1</sup> to 10<sup>-</sup><sup>4</sup> Mol %
作者:Jean-Cyrille Hierso、Aziz Fihri、Régine Amardeil、Philippe Meunier、Henri Doucet、Maurice Santelli、Vladimir V. Ivanov
DOI:10.1021/ol048870z
日期:2004.9.1
see text] The catalytic activity in Sonogashira cross-coupling reactions of alkynes with a variety of aryl halides (including chlorides) using a multidentate ferrocenyl phosphine is presented. The novel mixed ferrocenyl aryl/alkyl triphosphine is thermally stable and insensitive to air or moisture, and its robustness allows arylalkynylation at 10(-1) to 10(-4) mol % catalyst loadings with TONs up to
Microwave Irradiated Solventless Sonogashira Reaction on Nickel(0) Powder Doped KF/Al<sub>2</sub>O<sub>3</sub>
作者:Min Wang、Pinhua Li、Lei Wang
DOI:10.1081/scc-200026232
日期:2004.1
irradiated solventless Sonogashira coupling reaction catalyzed by nanosize nickel(0) powder on potassium fluoride–alumina mixture has been developed. Terminal alkynes couple with aryl, alkenyl iodide, and aryl bromide in the presence of cuprous iodide, triphenylphosphine, and ultrafine particle nickel(0) on potassium fluoride–alumina to generate the corresponding cross‐coupling products.
The Sonogashira coupling reaction catalyzed by ultrafine nickel(0) powder
作者:Lei Wang、Pinhua Li、Yicheng Zhang
DOI:10.1039/b314246a
日期:——
The Sonogashira coupling reaction catalyzed by ultrafine nickel(0) powder has been developed; terminal alkynes couple with aryl, alkenyl iodide and aryl bromide in the presence of cuprous iodide, triphenylphosphine, potassium hydroxide and ultrafine particle nickel(0) to provide the corresponding cross-coupling products with high yields.
Fast copper-, ligand- and solvent-free Sonogashira coupling in a ball mill
作者:Rico Thorwirth、Achim Stolle、Bernd Ondruschka
DOI:10.1039/c000674b
日期:——
Pd-catalyst and DABCO. Results indicated that the employment of Pd(OAc)2 in combination with SiO2 as a grinding auxiliary preferentially induces the transformation of aryl iodides to the corresponding Sonogashiracoupling products. In contrast, both the substitution of SiO2 by Al2O3 or replacement of Pd(OAc)2 with Pd(PPh3)4 enable the reaction of aryl bromides with phenylacetylenes. The selective reaction of
Elite cliques: Palladiumclusters with three and four atoms were found to be the catalyticallyactivespecies for ligand‐free palladium‐catalyzed CC bond‐forming reactions (see picture). These palladiumclusterspecies could be stabilized in water and stored for long periods of time for use on demand with no loss of activity. High yields of products and turnover frequencies (TOFs) of up to 105 h−1
精英集团:发现具有三个和四个原子的钯簇是无配体钯催化的CC键形成反应的催化活性物种(见图)。这些钯簇物种可以在水中稳定下来,并可以长期保存,以供按需使用,而不会损失活性。观察到高产量的产品和高达10 5 h -1的周转频率(TOF)。