Search Results - "Grün, Alajos"

Asymmetric cyclopropanation reactions catalyzed by carbohydrate-based crown ethers by Rapi, Zsolt, Nemcsok, Tamás, Grün, Alajos, Pálvölgyi, Ádám, Samu, Gyula, Hessz, Dóra, Kubinyi, Miklós, Kállay, Mihály, Keglevich, György, Bakó, Péter

“…Optically active cyclopropane derivatives were prepared by a novel, simple and green approach in high enantioselectivities using monosaccharide-based chiral…”
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Synthesis of Hydroxymethylenebisphosphonic Acid Derivatives in Different Solvents by Nagy, Dávid Illés, Grün, Alajos, Garadnay, Sándor, Greiner, István, Keglevich, György

“…The syntheses of hydroxymethylenebisphosphonic acid derivatives (dronic acid derivatives) starting from the corresponding substituted acetic acids and…”
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Crown ether derived from d-glucose as an efficient phase-transfer catalyst for the enantioselective Michael addition of malonates to enones by Rapi, Zsolt, Grün, Alajos, Nemcsok, Tamás, Hessz, Dóra, Kállay, Mihály, Kubinyi, Miklós, Keglevich, György, Bakó, Péter

“…[Display omitted] A monoaza-15-crown-5 lariat ether derived from d-glucose 1 has been applied as a chiral phase-transfer catalyst in the Michael addition of…”
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Stereoselective synthesis of trans-dihydronarciclasine derivatives containing a 1,4-benzodioxane moiety by Varró, Gábor, Pogrányi, Balázs, Grün, Alajos, Simon, András, Hegedűs, László, Kádas, István

“…Some new trans -dihydronarciclasine derivatives containing a 1,4-benzodioxane moiety were stereoselectively synthesised using our feasible and efficient method…”
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Solid-Liquid Phase C-Alkylation of Active Methylene Containing Compounds under Microwave Conditions by Alajos Grün, Erika Bálint, György Keglevich

“…The solid–liquid phase C-alkylation of active methylene containing compounds with C=O or P=O functions under phase transfer catalysis or microwave conditions…”
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“Greener” synthesis of bisphosphonic/dronic acid derivatives by Kovács Rita, Grün Alajos, Garadnay Sándor, Greiner István, Keglevich György

“…According to literature, the synthesis of dronic acid derivatives from the corresponding carboxylic acids using phosphorus trichloride and phosphorous acid as…”
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Synthesis and alkali cation extraction ability of 1,3-alt-thiacalix[4]bis(crown) ethers by Grün, Alajos, Csokai, Viktor, Parlagh, Gyula, Bitter, István

“…The first representatives of 1,3-alt-thiacalix[4]arene bis(crown-5 and -6) ethers were synthesized by the cyclocondensation of thiacalix[4]arenes with…”
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Synthesis and alkali cation extraction ability of 1,3-alt-thiacalix[4]mono(crown) ethers by Csokai, Viktor, Grün, Alajos, Parlagh, Gyula, Bitter, István

“…The first representatives of 1,3-alt-thiacalix[4]mono(crown-5 and -6) ethers were synthesized by the cyclocondensation of 25,27-dialkoxythiacalix[4]arenes with…”
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Green Chemical Tools in Organophosphorus Chemistry-Organophosphorus Tools in Green Chemistry by Keglevich, György, Grün, Alajos, Bálint, Erika, Kiss, Nóra Zs, Kovács, Rita, Molnár, István G., Blastik, Zsófia, Tóth, R. Viola, Fehérvári, András, Csontos, István

“…A variety of reactions including esterifications, alkylations, additions, cycloadditions, fragmentations, and condensations were carried out under microwave…”
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The First Enantioselective Total Synthesis of (−)-trans-Dihydronarciclasine by Varró, Gábor, Hegedűs, László, Simon, András, Balogh, Attila, Grün, Alajos, Leveles, Ibolya, Vértessy, Beáta G, Kádas, István

“…A feasible and enantioselective total synthesis of (−)-trans-dihydronarciclasine [(−)-1], a highly biologically active alkaloid, was devised starting from…”
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Synthetic study on the T3P®-promoted one-pot preparation of 1-substituted-3,4-dihydro-β-carbolines by the reaction of tryptamine with carboxylic acids by Ábrányi-Balogh, Péter, Földesi, Tamás, Grün, Alajos, Volk, Balázs, Keglevich, György, Milen, Mátyás

“…[Display omitted] •Novel one-pot method for β-carboline synthesis from tryptamine.•Beneficial synergy of the MW irradiation with a green reagent.•Efficient…”
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Synthesis of l‐threitol‐based crown ethers and their application as enantioselective phase transfer catalyst in Michael additions by Rapi, Zsolt, Nemcsok, Tamás, Pálvölgyi, Ádám, Keglevich, György, Grün, Alajos, Bakó, Péter

“…A few new l‐threitol‐based lariat ethers incorporating a monoaza‐15‐crown‐5 unit were synthesized starting from diethyl l‐tartrate. These macrocycles were used…”
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Enantioselective Michael addition of malonates to aromatic nitroalkenes catalyzed by monosaccharide-based chiral crown ethers by Rapi, Zsolt, Démuth, Balázs, Keglevich, György, Grűn, Alajos, Drahos, László, Sóti, Péter L., Bakó, Péter

“…The asymmetric Michael addition of diethyl malonate and α-substituted diethyl malonates to aromatic nitroalkenes was carried out under mild reaction conditions…”
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The synthesis of hydroxymethylenebisphosphonic- (dronic-) and acyl-ethoxycarbonyl-methylphosphonate derivatives by Keglevich, György, Szalai, Zsuzsanna, Gulyás, Kinga V., Zahár, Róbert, Grün, Alajos, Für, Csilla Sepsey

“…Recent results on the synthesis of substituted hydroxymethylenebisphosphonic acids (A and B), as well as acylated ethoxycarbonyl-methylphosphonate derivatives…”
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Proton dissociation properties of arylphosphonates: Determination of accurate Hammett equation parameters by Dargó, Gergő, Bölcskei, Adrienn, Grün, Alajos, Béni, Szabolcs, Szántó, Zoltán, Lopata, Antal, Keglevich, György, Balogh, György T.

“…[Display omitted] •Determination of the proton dissociation constants of arylphosphonic acid derivatives.•Comparison of our experimental values to predicted…”
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Efficient syntheses of zoledronic acid as an active ingredient of a drug against osteoporosis by Nagy, Dávid Illés, Grün, Alajos, Lévay, Krisztina, Garadnay, Sándor, Greiner, István, Keglevich, György

“…The reaction of 1H-imidazol-1-ylacetic acid and two equivalents of phosphorus trichloride/phosphorous acid at 75 °C in sulfolane, or in the presence of…”
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Asymmetric C–C bond formation via Darzens condensation and Michael addition using monosaccharide-based chiral crown ethers by Bakó, Péter, Rapi, Zsolt, Keglevich, György, Szabó, Tamás, Sóti, Péter L., Vígh, Tamás, Grűn, Alajos, Holczbauer, Tamás

“…Liquid–liquid phase asymmetric Darzens condensations were promoted by d-glucose- and d-mannose-based crown ethers. The corresponding aromatic and…”
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Microwave irradiation and catalysis in organophosphorus chemistry by Keglevich, György, Kiss, Nóra Zsuzsa, Bálint, Erika, Henyecz, Réka, Grün, Alajos, Mucsi, Zoltán

“…The possible combinations and connections of microwave (MW) and catalysts are discussed. MW-assisted reactions, such as the direct esterification or the…”
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Calixarene/Nafion-Modified Bismuth-Film Electrodes for Adsorptive Stripping Voltammetric Determination of Lead by Torma, Ferenc, Grün, Alajos, Bitter, Isván, Tóth, Klára

“…This paper presents an enhanced adsorptive stripping voltammetric procedure (AdSV) for the determination of Pb2+, which relies on the accumulation of the…”
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Green chemical syntheses and applications within organophosphorus chemistry by Keglevich, György, Grün, Alajos, Bálint, Erika, Kiss, Nóra Zsuzsa, Bagi, Péter, Tőke, László

“…Application of the microwave (MW) technique offers many advantages in organophosphorus syntheses. Reluctant reactions may take place on MW irradiation. In most…”
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