Fabrication of covalently functionalized mesoporous silica core-shell magnetite nanoparticles with palladium(II) acetylacetonate: application as a magnetically separable nanocatalyst for Suzuki cross-coupling reaction of acyl halides with boronic acids
作者:Abdolreza Hajipour、Ghobad Azizi
DOI:10.1002/aoc.3280
日期:2015.4
preparation of supportedpalladium(II) acetylacetonate, Pd(acac)2, coordinated by pendant acac groups, by reacting palladium acetate with acac‐functionalized doubly silica‐coated magnetic nanoparticles. The solid support consists of an amorphous silica‐coated (as magnetite protecting layer) magnetite core and a mesoporous silica shell. The magnetically separable palladiumnanocatalyst is active for
Efficient and Fast Method for the Preparation of Diaryl Ketones at Room Temperature
作者:Abdol Hajipour、Raheleh Pourkaveh
DOI:10.1055/s-0033-1341070
日期:——
the aryl ring of the acyl chlorides. Palladium-catalyzed cross-coupling reaction of arylboronic acids with acid chlorides at roomtemperature under phosphine-free conditions affords the corresponding aromatic ketones in excellent yields within short times. This synthetic method overcomes common disadvantages of Friedel–Crafts acylation procedures and is compatible with both electron-donating and electron-withdrawing
An Efficient Gold-Catalyzed Domino Process for the Construction of Tetracyclic Ketoethers
作者:Tobias Groß、Peter Metz
DOI:10.1002/chem.201302985
日期:2013.10.25
Au, yeah! Catalytic amounts of gold(III)chloride allow a mild and efficient oxidative domino cyclization/cycloaddition of enyne carbonyl compounds 1 and 4 to give the tetracycles 2 or 5, respectively, in the presence of pyridine N‐oxide 3 (see scheme; DCE = 1,2‐dichloroethane).
Efficient Access to Chiral Benzhydrols via Asymmetric Transfer Hydrogenation of Unsymmetrical Benzophenones with Bifunctional Oxo-Tethered Ruthenium Catalysts
A concise asymmetric transfer hydrogenation of diaryl ketones, promoted by bifunctional Ru complexes with an etherial linkage between 1,2-diphenylethylenediamine (DPEN) and η(6)-arene ligands, was successfully developed. Because of the effective discrimination of substituents at the ortho position on the aryl group, unsymmetrical benzophenones were smoothly reduced in a 5:2 mixture of formic acid and