Search Results - "Csámpai, A."

Alkylsilyl derivatization of glyphosate and aminomethylphosphonic acid followed by gas chromatography mass spectrometry by Arkan, T., Csámpai, A., Molnár-Perl, I.

“…Prior to any chromatographic analysis of N-(phosphonomethyl)glycine, glyphosate (GLYP) and its principal metabolite aminomethylphosphonic acid (AMPA) – being…”
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Synthesis and structure of novel ferrocene-containing β-carbolines including polycondensed derivatives with the elements of planar-, central- and conformational chirality by Kovács, Z., Jernei, T., Katona, D., Kocsis, L., Csámpai, A.

“…Employing tryptamine or tryptophane methylester hydrochloride and (Sp)-2-formylferrocene-1-carboxylate as precursors by means of Pictet–Spengler reactions and…”
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Synthesis, spectroscopy, X-ray analysis and in vitro antiproliferative effect of ferrocenylmethylene-hydrazinylpyridazin-3(2H)-ones and related ferroceno[d]pyridazin-1(2H)-ones by Csókás, D., Zupkó, I., Károlyi, B.I., Drahos, L., Holczbauer, T., Palló, A., Czugler, M., Csámpai, A.

“…Synthesis, structure determination and in vitro antiproliferative assay of a series of novel ferrocenenyl hydrazones containing 4-halopyridazin-3(2H)-one…”
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New ferrocenyl-substituted heterocycles. Formation under Biginelli conditions, DFT modelling, and structure determination by Kiss, K., Csámpai, A., Sohár, P.

“…A series of novel ferrocene-containing-dihydropyrimidines (DHPs) were prepared by three-component Biginelli reactions of formylferrocene, 1,3-dioxo-components…”
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Synthesis and structure of planar chiral ferroceno[ d]pyridazinones, the first representatives of a novel class of fused metallocenes by Gyömöre, Á., Csámpai, A.

“…A series of planar chiral ferroceno[ d]pyridazinones was prepared by hydrazine-mediated cyclisations of (S p)-2-formylferrocenoyl fluoride obtained in two…”
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Quantitation of various indolinyl caged glutamates as their o-phthalaldehyde derivatives by high performance liquid chromatography coupled with tandem spectroscopic detections: Derivatization, stoichiometry and stability studies by Vasanits-Zsigrai, A., Majercsik, O., Tóth, G., Csámpai, A., Haveland-Lukács, Cs, Pálfi, D., Szadai, Z., Rózsa, B., Molnár-Perl, I.

“…•Neurotransmitter indolinyl caged glutamates (ICGs) derivatization by o-phthalaldehyde.•Simultaneous HPLC-UV quantitation of ICGs, free glutamic acid and their…”
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Synthesis of 3-(Arylthio)propionic Acids from Nonactivated Aryl Iodides and their Use as Odorless Aryl Mercaptan Surrogates by Menczinger, B., Nemes, A., Csámpai, A., Rábai, J.

“…The reaction of aryl iodides, 3-mercaptopropionic acid, and Cu2O in refluxing pyridine resulted in the formation of 3-(arylthio)propionic acids in good to…”
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Application of Biginelli reaction to the synthesis of ferrocenylpyrimidones and [3]-ferrocenophane-containing pyrimido[4,5- d]pyrimidinediones by Csámpai, A., Györfi, A.Z., Túrós, Gy.I., Sohár, P.

“…Ferrocene-containing dihydropyrimidines (DHP’s) and cis-fused pyrimido[4,5- d]pyrimidine-2,7(1 H,3 H)-diones with [3]-ferrocenophane motif were prepared either…”
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Synthesis, IR-, NMR-, DFT- and X-ray analysis of novel C2-chiral diferrocenyl–salen complexes by Kiss, K., Holczbauer, T., Czugler, M., Sohár, P., Bodor, A., Csámpai, A.

“…Chiral salen complexes with C2-symmetry were prepared by the complexation of a selection of transition metal salts with a novel ligand obtained via controlled…”
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DFT analysis of a key step in the cinchona-mediated organocatalytic Michael-addition of nitromethane to 1,3-diphenylpropenone by Károlyi, B.I., Fábián, A., Kovács, Z., Varga, Sz, Drahos, L., Sohár, P., Csámpai, A.

“…[Display omitted] ► A series of potential organocatalyst candidates was investigated by DFT analysis. ► The influence of functional groups on the activation…”
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Advances in the evaluation of the stability and characteristics of the amino acid and amine derivatives obtained with the o-phthaldialdehyde/3-mercaptopropionic acid and o-phthaldialdehyde/ N-acetyl- l-cysteine reagents : High-performance liquid chromatography–mass spectrometry study by Mengerink, Y, Kutlán, D, Tóth, F, Csámpai, A, Molnár-Perl, I

“…The composition of the amino acid and amine derivatives obtained with the o-phthaldialdehyde (OPA)/3-mercaptopropionic acid (MPA) and with the OPA/ N-acetyl-…”
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o-Phthaldialdehyde derivatization of histidine: stoichiometry, stability and reaction mechanism by CSAMPAI, A, KUTLAN, D, TOTH, F, MOLNAR-PERL, I

“…The irregular behavior of histidine in its reaction with the o-phthaldialdehyde (OPA) reagents has been studied. Histidine provides more than one OPA…”
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Study on ferrocenes, part 9 substrate selective transformations of some ferrocenylhydrazones by Abrán, Á, Csámpai, A, Kotschy, A, Barabás, O, Sohár, P

“…Different ferrocenyl-substituted hydrazones of heteroaryl/arylhydrazines ( 1a– e, 3 and 10) were reacted with dimethyl fumarate and gave two epimeric pairs of…”
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Study on ferrocenes, part 6. 1,3-Dipolar cycloadditions of heterocyclic hydrazones of formylferrocene by Abrán, Á., Csámpai, A., Böcskei, Zs, Sohár, P.

“…1,3-Dipolar cycloaddition reactions of ferrocenylmethylidenehydrazones containing different heterocycles (1a-c) with some dipolarophiles resulted a series of…”
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Highly Enantioselective Conjugate Addition of Nitromethane to Chalcones Using Bifunctional Cinchona Organocatalysts by Vakulya, Benedek, Varga, Szilárd, Csámpai, Antal, Soós, Tibor

“…Cinchona alkaloid-derived chiral bifunctional thiourea organocatalysts were synthesized and applied in the Michael addition between nitromethane and chalcones…”
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The azaphilic addition of organometallic reagents on tetrazines: scope and limitations by Faragó, János, Novák, Zoltán, Schlosser, Gitta, Csámpai, Antal, Kotschy, András

“…A series of tetrazines were reacted with organometallic reagents. Depending on the nature of the metal azaphilic addition, reduction of the tetrazine or simple…”
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A retro Diels–Alder method for the preparation of pyrrolo[1,2- a]pyrimidinediones from diexo-aminooxanorbornenecarboxamide by Stájer, Géza, Szabó, Angela E., Sohár, Pál, Csámpai, Antal, Sillanpää, Reijo

“…Through the reactions of diexo-3-amino-7-oxanorbornene-2-carboxamide 1 with the oxocarboxylic acids: 4-oxopentanoic acid, p-chlorobenzoylpropionic acid or…”
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Structure elucidation and DFT-study on substrate-selective formation of chalcones containing ferrocene and phenothiazine units. Study on ferrocenes, Part 17 by Lovász, Tamás, Túrós, György, Găină, Luiza, Csámpai, Antal, Frigyes, Dávid, Fábián, Balázs, Silberg, Ioan A., Sohár, Pál

“…By means of base-catalysed condensation of 1-acyl-/1,1′-diacylferrocenes (acyl formyl or acetyl) with 3-formyl- and 3,7-diacetylphenothiazines a series of…”
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Macrocyclic Double Ferrocenes, Their Stereostructure, and an IR and NMR Spectroscopic, X-ray Crystallographic, and Conformational and Dynamic Investigation by Sohár, Pál, Csámpai, Antal, Abrán, Árvácska, Túrós, György, Vass, Elemér, Kudar, Veronika, Újszászy, Kálmán, Fábián, Balázs

“…Condensation reactions of 1,1'‐diacetylferrocenes with hydrazine afford a series of novel ferrocenophanes with two incorporated ferrocene units. NMR…”
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Advances in the evaluation of the stability and characteristics of the amino acid and amine derivatives obtained with the o-phthaldialdehyde/3-mercaptopropionic acid and o-phthaldialdehyde/N-acetyl-l-cysteine reagents by Mengerink, Y, Kutlán, D, Tóth, F, Csámpai, A, Molnár-Perl, I

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