A5090317734- Fluorine in Organic Chemistry
- Synthesis and Reactions of Organic Compounds
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Organophosphorus compounds synthesis
- Chemical Synthesis and Analysis
- Inorganic Fluorides and Related Compounds
- Carbohydrate Chemistry and Synthesis
- Advanced Chemical Physics Studies
- Organic Chemistry Cycloaddition Reactions
- Synthesis and Biological Evaluation
- DNA and Nucleic Acid Chemistry
- Chemical Reactions and Mechanisms
- Radical Photochemical Reactions
- Synthetic Organic Chemistry Methods
- Chemical Reaction Mechanisms
- Synthesis and Catalytic Reactions
- Oxidative Organic Chemistry Reactions
- Click Chemistry and Applications
- Asymmetric Synthesis and Catalysis
- Cyclopropane Reaction Mechanisms
- Catalysis and Oxidation Reactions
- Crystallography and molecular interactions
- Synthesis and properties of polymers
- Molecular Junctions and Nanostructures
Adam Mickiewicz University in Poznań
2014-2024
Osaka University
2022
Okayama University
2022
HUN-REN Research Centre for Natural Sciences
2022
Eötvös Loránd University
2022
Gakushuin University
2022
Budapest University of Technology and Economics
2022
University of Tsukuba
2022
Faculty (United Kingdom)
2014-2021
Silesian University of Technology
2006
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic Control of Stereoselectivities Electrocyclic Reactions Cyclobutenes: A Triumph Theory in the Prediction Organic ReactionsWilliam R. Dolbier,, Henryk Koroniak, K. N. Houk, and Chimin SheuView Author Information Department Chemistry, University Florida, Gainesville, Florida 32611-7200, Faculty Adam Mickiewicz University, 60-780 Poznañ, Poland, Chemistry Biochemistry, California, Los Angeles, California 90095-1569 Cite this: Acc. Chem. Res....
Abstract This review presents the most important research on alternative polymer membranes with ionic groups attached, provides examples of materials a well-defined chemical structure that are described in literature. Furthermore, it elaborates synthetic methods used for preparing PEMs, current status fuel cell technology and its application. It also briefly discusses development PEMFC market.
The application of ab initio and DFT computational methods at six different levels theory (MP2/cc-pVDZ, MP2/aug-cc-pVTZ, B3LYP/cc-pVDZ, B3LYP/aug-cc-pVTZ, M06/cc-pVDZ, M06/aug-cc-pVTZ) to meta- para-substituted fluoro- trifluoromethylbenzene derivatives 1-fluoro- 1-trifluoromethyl-2-substituted trans-ethenes allowed the study changes in electronic geometric properties F- CF3-substituted systems under impact other substituents (BeH, BF2, BH2, Br, CFO, CHO, Cl, CN, F, Li, NH2, NMe2, NO, NO2,...
New gem-difluoroalkenes were synthesized by the dehydrofluorination of corresponding 4-CF3-β-lactams. An unexpected rearrangement mechanism ester moiety dependent on a stabilizing negative charge was observed. Hydrogenation to 4-CHF2-β-lactams successful from gem-difluoro-β-lactams.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetic and thermodynamic studies of the thermal electrocyclic interconversions perfluorinated dienes cyclobutenesWilliam R. Dolbier Jr., Henryk Koroniak, Donald J. Burton, Pamela L. Heinze, A. Bailey, G. S. Shaw, W. HansenCite this: Am. Chem. Soc. 1987, 109, 1, 219–225Publication Date (Print):January 1987Publication History Published online1 May 2002Published inissue 1 January...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRemarkable, contrasteric, electrocyclic ring opening of a cyclobuteneWilliam R. Dolbier Jr., Henryk Koroniak, Donald J. Burton, A. Bailey, G. S. Shaw, and W. HansenCite this: Am. Chem. Soc. 1984, 106, 6, 1871–1872Publication Date (Print):March 1, 1984Publication History Published online1 May 2002Published inissue 1 March 1984https://pubs.acs.org/doi/10.1021/ja00318a071https://doi.org/10.1021/ja00318a071research-articleACS PublicationsRequest reuse...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetic and thermodynamic effects in the thermal electrocyclic ring-openings of 3-fluorocyclobutene, 3,3-difluorocyclobutene, 3-(trifluoromethyl)cyclobuteneWilliam R. Dolbier Jr., Thomas A. Gray, Jeffrey J. Keaffaber, Lech Celewicz, Henryk KoroniakCite this: Am. Chem. Soc. 1990, 112, 1, 363–367Publication Date (Print):January 1990Publication History Published online1 May 2002Published inissue 1 January...
Direct conversion of the α-hydroxyl group by
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal rearrangement of 2,2-difluorovinylcyclopropane. A concerted pathway?William R. Dolbier Jr., B. H. Al-Sader, Simon F. Sellers, and Henryk KoroniakCite this: J. Am. Chem. Soc. 1981, 103, 8, 2138–2139Publication Date (Print):April 1, 1981Publication History Published online1 May 2002Published inissue 1 April 1981https://pubs.acs.org/doi/10.1021/ja00398a064https://doi.org/10.1021/ja00398a064research-articleACS PublicationsRequest reuse...
GRAPHICAL ABSTRACTLatest achievements in the preparation of fluorinated aminophosphonates and aminophosphonic acidsAll authorsTomasz Cytlak, Marcin Kaźmierczak, Monika Skibińska & Henryk Koroniakhttps://doi.org/10.1080/10426507.2017.1287706Published online:25 May 2017
A kinetic study of the effect fluorine substitution on rates and regiochemistry hex-5-enyl radical cyclization is reported. One or more fluorines proximate to double bond have relatively little electronic either rate regiochemistry, whereas substituted at end can a dramatic impact both. The relative reactivities such partially-fluorinated radicals be understood largely in terms polar effects transition state, but pyramidalization and, lesser extent, addition thermodynamics play role....
Tetrapeptide p-nitroanilides containing (E)-dehydrophenylalanine were synthesized and evaluated as inhibitors substrates of cathepsin C. Peptides a free, unblocked amino group appeared to be quite good the enzyme, whereas fully protected peptides acted very weak inhibitors. Structural studies by means NMR CD, alongside with molecular modelling, have proved that these are hydrolysed in one step direct removal p-nitroaniline from tetrapeptide.
We report a simple protocol for the synthesis of α‐fluoro‐β‐aminophosphonates by regioselective fluorination α‐hydroxy‐β‐aminophosphonates under mild conditions. The reactions were mediated PyFluor reagent and occurred with retention configuration. main products this reaction series α‐fluoro‐β‐aminophosphonates, which can be used as precursors in preparation medicinally important compounds (e.g., dipeptide analogues).
A one-step, regioselective procedure to an unexplored class of isoxazolines and isoxazoles bearing a difluoromethyl phosphonate group is reported.
Abstract 19 F NMR chemical shifts and coupling constants are given for a series of aryl (phenyl, naphthyl phenanthryl) substituted trifluorovinyls ( E )‐ Z )‐perfluoropropenyls. The relationship between the configurational orientation perfluoroalkenyl substituents is discussed.