A5002852940- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Asymmetric Synthesis and Catalysis
- Dyeing and Modifying Textile Fibers
- Photochemistry and Electron Transfer Studies
- Crystallography and molecular interactions
- Chemical Synthesis and Analysis
- Porphyrin and Phthalocyanine Chemistry
- Photochromic and Fluorescence Chemistry
- Axial and Atropisomeric Chirality Synthesis
- Chemical Synthesis and Reactions
- Catalytic C–H Functionalization Methods
- Asymmetric Hydrogenation and Catalysis
- Synthesis and Characterization of Heterocyclic Compounds
- Oxidative Organic Chemistry Reactions
- Cyclopropane Reaction Mechanisms
- Synthesis and Catalytic Reactions
- Electrospun Nanofibers in Biomedical Applications
- Luminescence and Fluorescent Materials
- Alkaloids: synthesis and pharmacology
- Nanocomposite Films for Food Packaging
- Nanomaterials for catalytic reactions
- Carbohydrate Chemistry and Synthesis
- Synthesis and Reactions of Organic Compounds
- Corrosion Behavior and Inhibition
Charles University
2007-2025
University of Pardubice
2014-2024
Justus-Liebig-Universität Gießen
2012-2021
Giessen School of Theology
2019-2020
University of Geneva
2013-2019
Charles Humbert 8
2015-2019
University of Minho
2004
University of Leeds
2004
Russian Academy of Sciences
2003
Brown University
2003
Abstract This minireview summarizes synthetic approaches towards homoleptic dirhodium(II,II) paddlewheel complexes with the general formula Rh 2 A 4 . These have found numerous applications in a wide range of chemical research and industry as catalysts, detectors, enzymatic inhibitors or building blocks for molecular scaffolds. In organic synthesis they are commonly used to transfer electron‐deficient species, act Lewis acids activate unsaturated bonds, serve hydrogenation catalysts...
Achiral, diamagnetic Ni(II) complexes 1 and 3 have been synthesized from salts the Schiff bases, generated glycine PBP (7) PBA (11), respectively, in MeONa/MeOH solutions. The requisite carbonyl-derivatizing agents pyridine-2-carboxylic acid(2-benzoyl-phenyl)-amide 7 (PBP) acid(2-formyl-phenyl)-amide 11 (PBA) were readily prepared picolinic acid o-aminobenzophenone or methyl o-anthranilate, respectively. structure of was established by X-ray crystallography. Complexes found to undergo...
We present a new class of catalysts based on the combination N,N'-diaryl(thio)ureas and weak silicon Lewis acids (e.g., SiCl(4)). Such silicon-(thio)urea effectively catalyze stereospecific rearrangement epoxides to quaternary carbaldehydes.
We present a method for the amination of enolizable and non-enolizable ketones in alpha (or beta) position to carbonyl group. This approach is based on conversion corresponding cyanohydrins carbonazidates, precursors thermal intramolecular nitrene insertion reactions into adjacent C-H bond. Hydrolysis resulting carbamates under basic conditions with simultaneous regeneration group yields amino ketones.
Abstract The [2+2+2] cyclotrimerization of 1,7,9,15‐hexadecatetrayne with nitriles catalyzed by dicarbonylcyclopentadienylcobalt(I) opened a new pathway for the synthesis C 2 ‐symmetrical bis(tetrahydroisoquinolines) that were used as starting material preparation axially chiral bipyridine N , N′ ‐dioxides. ‐dioxides (1 mol%) found to be highly catalytically active and enantioselective (up 83% ee ) asymmetric allylation aldehydes allyl(trichloro)silane in various solvents. In addition,...
Abstract magnified image Unsymmetrically 3,3′‐substituted axially chiral bis(tetrahydroisoquinoline) N,N′‐ dioxides can be prepared in just three steps. They exhibit unique catalytic activity (turnover frequency, enantioselectivity, substrate scope) the asymmetric allylation of aromatic aldehydes (up to 96% ee ). The product enantioselective benzaldehyde served as a building block for preparation an intermediate useful synthesis diospongines.
Inspired by the extraordinary selectivities of acylases, we envisioned use lipophilic oligopeptidic organocatalysts for acylative kinetic resolution/desymmetrization rac- and meso-cycloalkane-1,2-diols. Here describe in a full account discovery development process from theoretical concept to final catalyst, including scope limitations. Competition experiments with various alcohols electrophiles show potential employed oligopeptides. Additionally, utilized NMR IR-spectroscopic methods as well...
Abstract The [2+2+2] cyclotrimerization of 1‐isoquinolinyl‐1,7‐octadiyne with benzonitrile catalyzed by CpCo(CO) 2 opened a new pathway for synthesis unsymmetrical axially chiral bipyridine N , N′ ‐dioxides. ‐dioxide 3a was found to be highly catalytically active and enantioselective the asymmetric allylation aldehydes allyltrichlorosilane. took place even 1 % catalyst an enantioselectivity up 87 ee .
We describe the efficient and highly enantioselective kinetic resolution of trans-cycloalkane-1,2-diols utilizing an Steglich reaction with a variety carboxylic acids that form corresponding anhydrides in situ.
New solid state hydrazone fluorescent reactive disperse dyes based on pyrrolinone ester and temporarily anionic sulfatoethylsulfone moiety were prepared. The NMR of all prepared was studied in details; these observed only pure form as a mixture between E/Z isomers. Spectral properties dye derivatives showed significant fluorescence at low temperature (77 K) well polycrystalline state. dyeing application investigated polyamide 6 wool fabrics. emission spectra the dyed fabrics measured....
Abstract We present a new approach to disubstituted diamondoids from corresponding carboxylic acids. A dirhodium‐acetate‐catalyzed (1 mol‐%) nitrene insertion reaction of sulfamides was, for the first time, applied intramolecular C–H functionalization reactions rigid tricyclic frameworks. This straightforward enables effective and regioselective synthesis variety diamondoid‐based cyclic sulfamidates, which are synthetically valuable building blocks. Reductive deprotection sulfamidate moiety...