Search Results - "SZÖLLÖSI, György"

1,2‐Diamine‐Derived (thio)Phosphoramide Organocatalysts in Asymmetric Michael Additions by Kozma, Viktória, Fülöp, Ferenc, Szőllősi, György

“…Phosphoramides and thiophosphoramides were prepared from optically pure C2‐symmetric 1,2‐diamines and were used as chiral organocatalysts in the asymmetric…”
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Comparative Study of Graphite-Oxide and Graphene-Oxide Supported Proline Organocatalysts in Asymmetric Aldol Addition by Szőri, Kornél, Réti, Balázs, Szőllősi, György, Hernádi, Klára, Bartók, Mihály

“…Graphite oxide (GrO), graphene oxide (GnO) and their sulphated derivatives (GrOs, GrOo, GnOs, GnOo) were prepared from graphite (Gr) and graphene (Gn) as…”
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Asymmetric Michael addition catalyzed by a cinchona alkaloid derivative non-covalently immobilized on layered inorganic supports by Szőllősi, György, Kovács, Lenke, Kozma, Viktória, Kolcsár, Vanessza Judit

“…A study on the asymmetric Michael addition of a fluorine containing carbon nucleophile to β-nitrostyrene was carried out to find an easily obtainable cinchona…”
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Achiral amine additives in the enantioselective hydrogenation of aliphatic α,β-unsaturated acids over cinchonidine-modified Pd/Al 2O 3 catalyst by Makra, Zsolt, Szőllősi, György, Bartók, Mihály

“…[Display omitted] ► The hydrogenation of aliphatic unsaturated acids was studied over cinchonidine-modified Pd. ► The achiral secondary amine additives were…”
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Reversal of Enantioselectivity in Aldol Reaction: New Data on Proline/[gamma]-Alumina Organic-Inorganic Hybrid Catalysts by Szollosi, Gyorgy, Fekete, Monika, Gurka, Andras A, Bartok, Mihaly

“…We report new results on the aldol reactions between aldehydes of three different types (aromatic, aliphatic and cycloaliphatic) and acetone/cycloalkanones as…”
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Nitrogen-Containing Heterocycles as Significant Molecular Scaffolds for Medicinal and Other Applications by Frank, Éva, Szőllősi, György

“…Most of the organic compounds applied as pharmaceuticals or intermediates utilized in their synthesis contain heterocyclic motifs [...]…”
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New Data on the Orito Reaction: Effect of Substrate Structure on Nonlinear Phenomenon by BALAZSIK, Katalin, CSERENYI, Szabolcs, SZÖLLÖSI, György, FÜLÖP, Ferenc, BARTOK, Mihaly

“…The nonlinear phenomenon (NLP) was studied for the first time in the enantioselective hydrogenation of ethyl pyruvate (EP) and ketopantolactone (KPL) under…”
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Asymmetric transfer hydrogenation of 2,3-diphenylpropenoic acids over heterogeneous palladium catalysts modified by cinchona alkaloids by Szőllősi, György, Resch, Vivien Erzsébet, Kolcsár, Vanessza Judit

“…[Display omitted] •Unsaturated acids were transfer hydrogenated over supported palladium catalyst.•Catalysts modified by 10,11-dihydrocinchonidine afforded…”
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New Data of Nonlinear Phenomenon in the Heterogeneous Enantioselective Hydrogenation of Activated Ketones by BALAZSIK, Katalin, SZÖLLÖSI, György, BARTOK, Mihaly

“…Results on nonlinear phenomenon (NLP) in the liquid phase hydrogenation of methyl benzoylformate (MBF) and pyruvaldehyde dimethyl acetal (PA) on chiral…”
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Synthesis of a Pyrrolo[1,2-a]quinazoline-1,5-dione Derivative by Mechanochemical Double Cyclocondensation Cascade by Kolcsár, Vanessza Judit, Sz?ll?si, György

“…N-heterocyclic compounds, such as quinazolinone derivatives, have significant biological activities. Nowadays, as the demand for environmentally benign,…”
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Design of Heterogeneous Organocatalyst for the Asymmetric Michael Addition of Aldehydes to Maleimides by Szőllősi, György, Kozma, Viktória

“…Asymmetric Michael additions of isobutyraldehyde to maleimides catalyzed by optically pure diamines and their sulfonamides were investigated to develop…”
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β-Amino Acid Organocatalysts in the Asymmetric Michael Addition of Isobutyraldehyde to N-Substituted Maleimides by Viktória Kozma, Zsolt Szakonyi, György Szőllősi

“…Asymmetric Michael additions of carbonyl compounds to N-substituted maleimides are among the most convenient reactions to prepare optically pure succinimide…”
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Mechanochemical, Water‐Assisted Asymmetric Transfer Hydrogenation of Ketones Using Ruthenium Catalyst by Kolcsár, Vanessza Judit, Szőllősi, György

“…Asymmetric catalytic reactions are among the most convenient and environmentally benign methods to obtain optically pure compounds. The aim of this study was…”
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Conjugate addition of 1,3-dicarbonyl compounds to maleimides using bifunctional primary amine‒(thio)phosphoramide organocatalysts by Kozma, Viktória, Szőllősi, György

“…•Asymmetric Michael addition of 1,3-dicarbonyl compounds to maleimides were studied.•Primary amine-(thio)phosphoramide bifunctional organocatalyst were…”
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Ru-catalyzed mechanochemical asymmetric transfer hydrogenations in aqueous media using chitosan as chirality source by Kolcsár, Vanessza Judit, Szőllősi, György

“…•Mechanochemical transfer hydrogenations were performed with Ru-chitosan catalyst.•The reaction times were shortened from few days to few hours.•The…”
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Ruthenium(II)‐Chitosan, an Enantioselective Catalyst for the Transfer Hydrogenation of N‐Heterocyclic Ketones by Kolcsár, Vanessza Judit, Fülöp, Ferenc, Szőllősi, György

“…The present study aimed at extending the applicability of a recently developed stereoselective catalytic system to the preparation of optically enriched…”
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Hydrogenation of (E)-2-methyl-2-butenoic acid over cinchona-modified Pd catalyst in the presence of achiral amines: Solvent and modifier effect by Makra, Zsolt, Szőllősi, György

“…The effect of the solvent, modifier structure and concentration on the enantioselective hydrogenation of (E)-2-methyl-2-butenoic acid over Pd/Al2O3 modified by…”
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Unusual enantioselectivities in heterogeneous organocatalyzed reactions: Reversal of direction using proline di- versus tri-peptides in the aldol addition by Szőllősi, György, Csámpai, Antal, Somlai, Csaba, Fekete, Mónika, Bartók, Mihály

“…•Asymmetric aldol reactions were studied over supported di- and tri-peptides.•The ee reversed on tripeptide catalyst as compared to the dipeptide.•Quantum…”
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Up to 96% Enantioselectivities in the Hydrogenation of Fluorine Substituted (E)-2,3-Diphenylpropenoic Acids over Cinchonidine-Modified Palladium Catalyst by Szollosi, Gyorgy, Herman, Beata, Felfoldi, Karoly, Fulop, Ferenc, Bartok, Mihaly

“…The enantioselective hydrogenation of methoxy‐ and fluorine‐substituted (E)‐2,3‐diphenylpropenoic acid derivatives was studied over cinchonidine‐modified,…”
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New data to the origin of rate enhancement on the Pt-cinchona catalyzed enantioselective hydrogenation of activated ketones using continuous-flow fixed-bed reactor system by SZÖLLÖSI, Gyorgy, CSERENYI, Szabolcs, FÜLÖP, Ferenc, BARTOK, Mihaly

“…A study on the origin of rate enhancement (RE) in the enantioselective heterogeneous catalytic hydrogenation of methyl benzoylformate (MBF), ketopantolactone…”
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