Search Results - "Hell, Z"

A copper-free Sonogashira reaction using a Pd/MgLa mixed oxide by Cwik, Agnieszka, Hell, Zoltán, Figueras, François

“…A new Pd/MgLa mixed oxide is found to be an efficient catalyst for the Sonogashira reaction of aryl iodides, bromides and even activated chlorides in the…”
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Palladium/Magnesium-Lanthanum Mixed Oxide Catalyst in the Heck Reaction by Cwik, Agnieszka, Hell, Zoltán, Figueras, François

“…A new, reusable palladium/magnesium‐lanthanum mixed oxide catalyst has been found to exhibit unprecedented high catalytic activity and selectivity for the…”
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Nitroaldol-reaction of aldehydes in the presence of non-activated Mg:Al 2:1 hydrotalcite; a possible new mechanism for the formation of 2-aryl-1,3-dinitropropanes by Cwik, Agnieszka, Fuchs, Aliz, Hell, Zoltán, Clacens, Jean-Marc

“…Commercially available, non-activated 2:1 Mg:Al hydrotalcite catalyzes the nitroaldol reaction between a variety of aromatic and aliphatic aldehydes and simple…”
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An efficient and environmental-friendly synthesis of 4-hydroxy-arylpiperidines using hydrotalcite catalyst by Cwik, Agnieszka, Fuchs, Aliz, Hell, Zoltán, Clacens, Jean-Marc

“…A practical and convenient synthesis of 4-hydroxy-arylpiperidines, starting from bis-ketonic Mannich-bases in the presence of a commercially available…”
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Mg-Al 3:1 hydrotalcite catalyst in the synthesis of cyclopropane carboxylic acid derivatives by Finta, Zoltán, Hell, Zoltán, Balán, Daniella, Cwik, Agnieszka, Kemény, Sándor, Figueras, François

“…The non-activated Mg-Al 3:1 hydrotalcite is a suitable basic catalyst both in the intramolecular cyclization reaction of malonic acid allylic esters into…”
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Reaction of cyclopropane carboxylic acid derivatives with sulphur tetrafluoride — an example of a diastereoselective ring opening by Hell, Z, Finta, Z, Dmowski, W, Faigl, F, Pustovit, Yu.M, Tőke, L, Harmat, V

“…Cyclopropane carboxylic acid derivatives can be converted into trifluoromethyl group-containing compounds using SF 4. In the case of a bicyclic cyclopropane…”
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Diastereoselectivity in the formation of bicyclic cyclopropane carboxylic acid lactones by Hell, Zoltán, Finta, Zoltán, Grünvald, Tamás, Böcskei, Zsolt, Balán, Daniella, Keseru&#x030B, György M., Tőke, László

“…The intramolecular cyclization of malonic acid allylic esters yields bicyclic cyclopropane carboxylic acid lactones in a phase transfer catalysed reaction. The…”
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One-step preparation of 1-substituted tetrahydroisoquinolines via the Pictet–Spengler reaction using zeolite catalysts by Hegedüs, Adrienn, Hell, Zoltán

“…A new, one-step variation of the Pictet–Spengler reaction has been elaborated using a small pore size zeolite as the catalyst. A new, environmentally friendly…”
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A simple synthesis of 2-substituted oxazolines and oxazines by Cwik, Agnieszka, Hell, Zoltán, Hegedüs, Adrienn, Finta, Zoltán, Horváth, Zoltán

“…β-Aminoalcohols react with carboxylic acids in the presence of a zeolite, Ersorb-4, resulting in the formation of oxazoline derivatives in good yields…”
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A Bicyclic Cyclopropane Carboxylic Acid Lactone from a Solid-Liquid PTC Reaction by Böcskei, Z., Hell, Z., Finta, Z., Tőke, L., Simon, K.

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A simple environmentally-friendly method for the selective synthesis of 1,5-benzodiazepine derivatives using zeolite catalyst by HEGEDÜS, Adrienn, HELL, Zoltan, POTOR, Attila

“…The modified small pore size zeolite E4a has been found to be an efficient catalyst for the regioselective synthesis of 2,3-dihydro-1H-1,5-benzodiazepines from…”
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Convenient One-Pot Heterogeneous Catalytic Method for the Preparation of 3,4-Dihydropyrimidin-2(1H)-ones by Hegedüs, Adrienn, Hell, Zoltán, Vígh, Ilona

“…A new, simple, environmentally friendly synthesis of dihydropyrimidinones from aromatic and aliphatic aldehydes, ethyl acetoacetate, and urea or thiourea using…”
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Solid base-catalyzed synthesis of 5-substituted 4,5-dihydroisoxazoles by Cwik, Agnieszka, Hell, Zoltán, Fuchs, Aliz, Halmai, Dóra

“…A new, synthetic method for the preparation of 5-substituted 4,5-dihydroisoxazoles starting from ethyl nitroacetate and alkenes in the presence of hydrotalcite…”
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Nitroaldol-reaction of aldehydes in the presence of non-activated Mg:Al 2:1 hydrotalcite; a possible new mechanism for the formation of 2-aryl-1,3-dinitropropanes by Cwik, A., Fuchs, Alain H., Hell, Z., Clacens, Jean-Marc

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Bis-crown ether derivatives as ionophores for potassium selective electrodes by Lindner, E., Tóth, K., Horváth, M., Pungor, E., Ágai, B., Bitter, I., Tőke, L., Hell, Z.

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Zeolite-Catalyzed Environmentally Friendly Tetrahydropyranylation of Alcohols and Phenols by Hegedüs, Adrienn, Vígh, Ilona, Hell, Zoltán

“…A simple and environmentally friendly tetrahydropyranylation of various alcohols and phenols at room temperature was elaborated by using a small pore size…”
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Optical resolution by crystallization from melt using enantiomer derivatives as resolving agents: Nonlinear behavior of resolving agent mixtures by Schindler, József, Egressy, Márton, Bálint, József, Hell, Zoltán, Fogassy, Elemér

“…Substituted racemic 1‐phenylethylamine derivatives were reacted in molten phase with chiral N‐substituted 1‐phenylethylamine dicarboxylic acid derivatives…”
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A new and convenient method for the acylation of amino acids in the presence of a modified zeolite: Ersorb by Hell, Zoltán, Cwik, Agnieszka, Finta, Zoltán, Horváth, Zoltán

“…Reaction of free amino acids with acid chlorides in dioxane in the presence of a modified zeolite-type mineral Ersorb-4 results in the formation of the…”
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Structure determination and molecular modelling of an unexpected side product of a cyclopropane lactone formation process by Faigl, Ferenc, Finta, Zoltán, Hell, Zoltán, Kárpáti, Tamás, Harmat, Veronika, Kövesdi, István, Tőke, László

“…A new by-product has been isolated from the reaction mixture of a single electron transfer induced one-pot synthesis of a cyclopropane derivative. Molecular…”
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Synthesis and resolution of a Tolperisone metabolite by Bálint, József, Hell, Zoltán, Markovits, Imre, Párkányi, László, Fogassy, Elemér

“…The synthesis and resolution of a Tolperisone metabolite ((3′-hydroxy-4′-methylphenyl)-2-methyl-3-(piperidine-1-yl)-1-propane-1-one, M1) is described. Racemic…”
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