The asymmetric α-allylation of α-aryl-substituted 2-acetyl imidazoles synergistically catalyzed by Ni/Pd catalysts has been developed. In this process, the nickel-bisoxazoline complex activates the enolate of an acetyl imidazole, which then reacts with a π-allyl palladium electrophile generated from an allyl alcohol derivative by a palladium-based catalyst. A broad scope of substrates was suitable for this reaction. The utility of this method was demonstrated by a gram-scale reaction and subsequent elaboration of the allylation products.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1021/acs.orglett.3c01726 | DOI Listing |
Chemistry
December 2023
Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou, 313001, China.
In the domain of proton exchange membrane fuel cells (PEMFCs), the development of efficient and durable catalysts for the electro-oxidation of small organic molecules, especially of alcohols (methanol, ethanol, ethylene glycol, et al.) has always been a hot topic. A large number of related electrocatalysts with splendid performance have been designed and synthesized till now, while the preparation processes of most of them are demanding on experimental operations and conditions.
View Article and Find Full Text PDFInorg Chem
September 2023
College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China.
Using Ni as a template and reductant, Ni core-Pd shell nanoparticles (Ni@Pd NPs) supported on KIT-6 (Ni@Pd/K6) were prepared by a galvanic replacement reaction under ultrasonic radiation. The characterization results show that the Ni@Pd core-shell NPs with an average diameter of 1.9 ± 0.
View Article and Find Full Text PDFOrg Lett
July 2023
Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, College of Sciences, Shanghai Univerversity, Shanghai 200444, China.
The asymmetric α-allylation of α-aryl-substituted 2-acetyl imidazoles synergistically catalyzed by Ni/Pd catalysts has been developed. In this process, the nickel-bisoxazoline complex activates the enolate of an acetyl imidazole, which then reacts with a π-allyl palladium electrophile generated from an allyl alcohol derivative by a palladium-based catalyst. A broad scope of substrates was suitable for this reaction.
View Article and Find Full Text PDFPhys Chem Chem Phys
December 2022
Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India.
This study reports first principles calculations performed to study the electronic structure and catalytic activity of exsolved Ni on Pd core-shell catalysts reported in recent experimental literature. The modification in the electronic and geometric properties of the Ni/Pd bimetallic system as successive layers of Ni are added on top of Pd is systematically investigated using the d-band model as well as the adsorption of O and CO on the surface of these core-shell structures. The results show that the adsorption of O and CO is more favourable on Ni/Pd core-shell catalysts compared to the pure Ni surface.
View Article and Find Full Text PDFPolymers (Basel)
November 2022
College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing 312000, China.
Hydrogen gas production can be produced from dimethylamine borane by the catalytic effect of metal nanoparticles. Past research efforts were heavily focused on dehydrogenation in organic solvents. In this study, hydrolysis of the borane in aqueous solutions was investigated, which bears two significant advantages: that two-thirds of the hydrogen generated originate from water and that the hydrogen storage materials are non-flammable.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!