Výsledky vyhledávání - "Elba Michelena"

The monoepoxidation of acyclic, conjugated aliphatic dienes by dimethyldioxirane: kinetics

Autor: Elba Michelena-Baez, Hsin-Hung Chen, Pedro C. Vasquez, Alfons L. Baumstark

Publikováno v: hc. 18:75-78

Kinetic data for the reaction of dimethyldioxirane (1) with a series of acyclic, aliphatic conjugated dienes 2a–f are reported. Monoepoxidation is the preferred process and the monoepoxides are formed in high yield as long as the dienes are in exce

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eae0a9515cce885839956934afcc496f
https://doi.org/10.1515/hc-2011-0125

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Experimental Determination of the Electronic Polarizability of Quinoline and Isoquinoline in Solution by Three New Strategies

Autor: Ysaias Alvarado, Yovani Marrero Ponce, María Gabriela Leal, Elba Michelena, Paola H. Labarca, Néstor Cubillán

Publikováno v: Journal of Solution Chemistry. 36:1139-1155

The values of electronic polarizability of quinoline and isoquinoline in extremely diluted liquid solution are reported in this paper. These were obtained by means of three new strategies based on UV-visible-NIR spectroscopy, the Kramers-Kronig relat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::10900e1f707980ec1e9480467527313a
https://doi.org/10.1007/s10953-007-9171-0

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Determination of the Apparent Molar Refraction and Partial Molar Volume at Infinite Dilution of Thiophene-, Pyrrole- and Furan-2-Carboxaldehyde Phenylhydrazone Derivatives in Acetonitrile at 293.15 K

Autor: Victoria Mancilla-Labarca, Elba Michelena, Gladys Ferrer-Amado, Ysaias Alvarado, José Caldera-Luzardo

Publikováno v: Journal of Solution Chemistry. 36:1-11

High-precision densitometry and high-accuracy refractometry measurements of extremely dilute solutions of the thiophene-2- (TCPH), pyrrole-2- (PCPH) and furan-2-carboxaldehyde-phenylhydrazone (FCPH) compounds in acetonitrile have been obtained at 293

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7adb53c30441bc12ece4716447f9ef9c
https://doi.org/10.1007/s10953-006-9093-2

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Activation Parameters for the Epoxidation of Substitutedcis/trans Pairs of 1,2-Dialkylalkenes by Dimethyldioxirane

Autor: Al L. Baumstark Dr., Angela M. Navarro-Eisenstein, Elba Michelena-Baez, Paul J. Franklin, W. Rucks Winkeljohn, Pedro C. Vasquez, Brian S. Crow

Publikováno v: European Journal of Organic Chemistry. 2006:4642-4647

The first activation parameter data for the reaction of dimethyldioxirane (1) with five cis/trans pairs of alkenes are reported. The epoxidation of cis-1,2-dialkylalkenes (2cis: R1 = Me, R2 = iPr; 3cis: R1 = Me, R2 = tBu; 4cis: R1 = R2 = Et; 5cis: R1

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::870c053994aa1e94a9c3d965934d10ff
https://doi.org/10.1002/ejoc.200600427

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Volumetric, Electric, and Magnetic Properties of Thioxanthen-9-one in Aprotic Solvents as Revealed by High-Precision Densitometry, High-Accuracy Refractometry and Magnetic Susceptibility Measurements and by DFT Calculations

Autor: Ysaias Alvarado, Pedro Silva, Gladys Ferrer-Amado, Carlos De La Cruz, Elba Michelena, José Caldera-Luzardo

Publikováno v: Journal of Solution Chemistry. 35:29-49

High-precision densitometry measurements of solutions of thioxanten-9-one (TX) in 1,4-dioxane, DMSO, toluene, and benzene have been obtained at 293.15, 303.15, 313.15, 323.15, 333.15, and 343.15K. The partial molar volumes of TX ( $$\bar V _2$$ ) and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::036cc2993aaa9670326e066416b1f1d8
https://doi.org/10.1007/s10953-006-8937-0

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1H and13C NMR spectral characterization of some antimalarialin vitro2,4-diamino-10-methylpyrimido[4,5-b]-5-quinolone derivatives

Autor: Neira Gamboa, Simón E. López, Nolberto Piña, Jorge Angel, Elba Michelena, José N. Domínguez, Jaime Charris, Mayamarú Guerra

Publikováno v: Magnetic Resonance in Chemistry. 40:477-479

We report the 1H NMR and 13C NMR chemical shifts and J(H,H), J(H,F) and J(C,F) coupling constants of 13 2,4-diamino-10-methylpyrimido[4,5-b]-5-quinolone derivatives, some of them with moderate activity against Plasmodium falciparum in vitro. They wer

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::214af909615d3ed6f05ab9775674417d
https://doi.org/10.1002/mrc.1024

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ChemInform Abstract: Tautomerism in Quinaldyl Ketones

Autor: Darin L. Dotson, Herng-Hsiang Lo, Elba Michelena, James E. Douglass, Ali Ataei

Publikováno v: ChemInform. 24

The quinaldyl ketone, 4-phenyl-3-(quinolin-2-yl)-butan-2-one was prepared by two methods: (a) benzylation of 1-(1H-quinolin-2-ylidene)propan-2-one in the presence of sodium hydride in dimethylformamide and (b) by the benzylative demethoxycarbonylatio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::04fb411957edf11db0727a5d8ea3a408
https://doi.org/10.1002/chin.199306183

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Tautomerism in quinaldyl ketones

Autor: James E. Douglass, Elba Michelena, Darin L. Dotson, Herng-Hsiang Lo, Ali Ataei

Publikováno v: Journal of Heterocyclic Chemistry. 29:1361-1363

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::73cd76e18a182f6d00a10c79a03a05fb
https://doi.org/10.1002/jhet.5570290552

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