Výsledky vyhledávání - "Lubomír Zalibera"

Reaction Pathways and the Role of Solvent in the Hydrogenation of Chloronitrobenzenes

Autor: V. Kratky, Magdaléna Štolcová, Milan Hronec, Milan Králik, Miroslava Mecárová, Lubomír Zalibera, Alexander Kaszonyi

Publikováno v: Collection of Czechoslovak Chemical Communications. 68:1819-1832

Liquid phase hydrogenation of chloronitrobenzenes to corresponding chloroanilines over Pd on carbon (Pd/C) under mild reaction conditions was studied. On the basis of 1H, 13C NMR, GC-MS and HPLC analyses of reaction mixtures, the reaction pathways we

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::67fa1f05de82371b419ca88c66a2fa8b
https://doi.org/10.1135/cccc20031819

Zobrazit plný text záznamu

Effect of catalyst and substituents on the hydrogenation of chloronitrobenzenes

Autor: Milan Hronec, Magdaléna Štolcová, Lubomír Zalibera, V. Kratky, Milan Králik, M. Mecarova

Publikováno v: Applied Catalysis A: General. 235:225-231

The liquid phase hydrogenation of chloronitrobenzene isomers ( x -CNB, x =2, 3, 4) to corresponding chloroanilines ( x -CAN) at 0.5 MPa and 25 °C was studied. Palladium catalysts containing 1 wt.% of Pd on charcoal and sulphonated poly(styrene- co -

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::55ce4b8b946362f72b23bb83868b9d54
https://doi.org/10.1016/s0926-860x(02)00274-0

Zobrazit plný text záznamu

Condensation Reactions of 1,2,3,4-Tetrahydro-6-methyl-2,4-dioxo-5-pyrimidinecarbaldehyde

Autor: Roman Gažo, Lubomír Zalibera, Pavel Bobáľ, Dušan Ilavský, N. Pronayova, Rudolf Kada

Publikováno v: Collection of Czechoslovak Chemical Communications. 60:605-611

Condensation reactions of 1,2,3,4-tetrahydro-6-methyl-2,4-dioxo-5-pyrimidinecarbaldehyde with nine acid derivatives containing an active methylene group are described. The obtained products were characterized by their IR, UV, 1H NMR, 13C NMR and mass

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2874d51bc36f7210db85301b734b09a1
https://doi.org/10.1135/cccc19950605

Zobrazit plný text záznamu

Synthesis of Nitro-Substituted 4-Oxo-4H-pyrimido[2,1-b]benzothiazole-3-carboxylic Acids and Their Spectral Characteristics

Autor: Ondrej Šimo, A. Belicová, Lubomír Zalibera, Alexander Bartovič, Milan Seman, Dušan Ilavský

Publikováno v: Collection of Czechoslovak Chemical Communications. 60:583-593

The Gould-Jacobs reaction of all position isomeric 2-aminonitrobenzothiazoles II with diethyl ethoxy- methylenemalonate has been studied. The structure of substitution (IV) and cyclization (VI) products and of the corresponding acids (VIII) was confi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b79ac228e9e42bbf7b714d91191a17d6
https://doi.org/10.1135/cccc19950583

Zobrazit plný text záznamu

Thermal Cyclocondensation of Ethyl (1-Methyl-5- and 6-Benzimidazolyl/benzotriazolyl)aminomethylenepropanedioates

Autor: Viktor Milata, Lubomír Zalibera, Dušan Ilavský, Igor Goljer

Publikováno v: Collection of Czechoslovak Chemical Communications. 59:1145-1152

Thermal cyclocondensation of starting ethyl (1-methyl-5- and 6-benzimidazolyl/benzotriazolyl)aminomethylenepropanedioates (Ia - Ie) in aprotic medium gives angularly condensed ethyl azolo[4,5-f]quinolonecarboxylates IIa, IIc, IIe and azolo[5,4-f]quin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c3861549a871d465727ece303444f3e4
https://doi.org/10.1135/cccc19941145

Zobrazit plný text záznamu

Synthesis of New 2-Substituted 4-(2-Furyl)-4H-pyrans

Autor: Milan Bruncko, Dušan Ilavský, Lubomír Zalibera, Štefan Marchalín

Publikováno v: Collection of Czechoslovak Chemical Communications. 59:1458-1462

Substituted 2-amino-3-cyano-4H-pyrans represent important precursors in syntheses of condensed heterocycles containing a 4H-pyran nucleus. In the context of studies of reactivity of 2-amino-5-acetyl-4-(5-X-2-furyl)-3-cyano-6-methyl-4H-pyrans we were

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0cf77e7d980ce735388c357d66a5b2b1
https://doi.org/10.1135/cccc19941458

Zobrazit plný text záznamu

Synthesis, Reactions and Spectral Properties of Ethyl Esters of 2-Cyano-3-(5-X-2-furyl)acrylic Acid

Autor: Lubomír Zalibera, Jiří Paďour, Dušan Ilavský, Jarmila Štetinová, Rudolf Kada

Publikováno v: Collection of Czechoslovak Chemical Communications. 59:444-452

The reaction of 5-X-2-furaldehydes (X = C6H5, COOCH3, COOC2H5, C6H5O, C6H5S, CH3S, 4-Cl-C6H4S, CH3SO2, C6H5SO2, 4-Cl-C6H4SO2) with ethyl cyanoacetate in dry ethanol catalyzed by sodium ethoxide yielded the corresponding ethyl 2-cyano-3-(5-X-2-furyl)a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d37a090f59234255ae5b4ceaa182b4d1
https://doi.org/10.1135/cccc19940444

Zobrazit plný text záznamu

Simple Preparation of 4,5-Disubstituted 2-Cyclopentenones

Autor: Dušan Berkeš, Peter Šafář, Lubomír Zalibera, František Považanec

Publikováno v: Collection of Czechoslovak Chemical Communications. 58:555-564

(E-2-Formyl-3-(2-furyl)propenenitrile (I) reacts with primary aromatic amines under formation of 3-(arylamino)-2-[5-(arylamino)-2-oxo-3-cyclopenten-1-yl]propenenitriles (IVa-IVi). Condensation of I with salts of nitrogen bases in pyridine affords 2-(

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9f59f74df4dc629135d1658ea354b4f3
https://doi.org/10.1135/cccc19930555

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání