Palladium-Catalyzed Alkoxycarbonylation of Terminal Alkenes To Produce α,β-Unsaturated Esters: The Key Role of Acetonitrile as a Ligand
作者:Andrei V. Malkov、Nolwenn Derrien、Maciej Barłóg、Pavel Kočovský
DOI:10.1002/chem.201304798
日期:2014.4.14
A mild protocol has been developed for the PdII‐catalyzed alkoxycarbonylation of terminal olefins to produceα,β‐unsaturated esters with a wide range of substrates. Key features are the use of MeCN as solvent (and/or ligand) to control the reactivity of the intermediate Pd complexes and the combination of CO with O2, which facilitates the CuII‐mediated reoxidation of the Pd0 complex to PdII and prevents
Synthesis of a Novel <i>C</i><sub>2</sub>-Symmetric Thiourea and Its Application in the Pd-Catalyzed Cross-Coupling Reactions with Arenediazonium Salts under Aerobic Conditions
作者:Mingji Dai、Bo Liang、Cuihua Wang、Jiahua Chen、Zhen Yang
DOI:10.1021/ol036182u
日期:2004.1.1
[reaction: see text] A novel thiourea-based C2-symmetric ligand was synthesized, and its application in the palladium-catalyzed Heck and Suzuki coupling reactions of arenediazonium salts was evaluated. The reactions, which were performed at room temperature, without added base, and under aerobic conditions, produced product in 4 h with good yield. The corresponding arenediazonium salts were easily
agglomeration upon increasing their loading amount into metal–organic frameworks (MOFs) has been addressed by functionalization of MOFs with alkyne groups. The alkynophilicity of the Pd2+ (or other noble metals) ions has been utilized successfully for significant loading of Pd NPs into alkyne functionalized MOFs. It has been shown here that the size and loading amount of Pd NPs are highly dependent
Preparation, Properties, and Structures of Pentanuclear [{Ni<sub>2</sub>L}<sub>2</sub>(μ-csalen)<i>M</i>]<sup>2+</sup>Complexes (L = Macrocyclic N<sub>6</sub>S<sub>2</sub>Donor Ligand)
作者:Matthias Golecki、Berthold Kersting
DOI:10.1002/zaac.201400427
日期:2015.2
The dinuclear nickel complex [Ni2L(μ-Cl)]+ (1), where L2– is a 24-membered macrocyclicN6S2ligand, reacts readily with 3-formyl-4-hydroxy-benzoic acid (Hfhba) to form the carboxylato-bridged complex [Ni2L(μ-fhba)]+ (2). Complex2 undergoes a condensation reaction with ethylene diamine to produce a tetranuclear complex [Ni2L}2(μ-H2csalen)]2+ (3), in which two dinuclear Ni2L} units are bridged via
In situ generated palladium on aluminum oxide provides an active catalytic system for Matsuda-Heck reactions in gram-scale. The novel catalyst proceeded through a significantly higher catalytic activity compared to the classical Pd/C system. Based on the high catalytic activity the first α,β,β-triarylation of methylacrylate in good yields could be provided in one-step.