Results 11 to 20 of about 151,662 (178)

Gas Chromatography-Mass Spectrometry Study of the Essential Oils of Schinus longifolia (Lindl.) Speg., Schinus fasciculata (Griseb.) I. M. Johnst., and Schinus areira L. [PDF]

open access: yes, 2005
The essential oil composition from the aerial parts of three Anacardiaceae growing in Bah¨ªa Blanca, Argentina was studied by gas chromatography and gas chromatography-mass spectrometry. The essential oils of S. longifolia and S.
Frontera, Maria Eugenia   +3 more
core   +1 more source

Synthesis, anti-tuberculosis activity and QSAR study of 2,4-diarylquinolines and analogous polycyclic derivatives [PDF]

open access: yes, 2019
The multicomponent syntheses of 2,4-di-aryl-quinolines and analogous polycyclic derivatives as anti-tuberculosis agents were described. They were prepared via Beyer and Friedländer methods under microwave irradiation in short reaction times and good ...
Asís, Silvia Elizabeth   +7 more
core   +1 more source

Gas Phase Structure and Reactivity of Doubly Charged Microhydrated Calcium(II)-Catechol Complexes Probed by Infrared Spectroscopy [PDF]

open access: yes, 2014
Doubly charged microhydrated adducts formed from catechol and calcium(II) were produced in the gas phase using electrospray ionization (ESI) appearing as the most important ions in the mass spectra recorded. The gas phase structures of [Ca(catechol)2(H2O)
Arroyo Mañez, Pau   +3 more
core   +1 more source

Radical Fluoroalkylation Reactions [PDF]

open access: yes, 2018
Recent protocols and reactions for catalytic radical perfluoroalkylations will be described. The production of perfluoroalkyl radicals (RF = CnF2n+1, n ≥ 2), which effect both addition and substitution reactions on organic substrates, can be realized ...
Barata Vallejo, Sebastian   +2 more
core   +1 more source

Reaction of benzoxasilocines with aromatic aldehydes: Synthesis of homopterocarpans

open access: yesBeilstein Journal of Organic Chemistry, 2007
Condensation of 2H-benzo[g][1,2]oxasilocines with aromatic aldehydes in the presence of boron trifluoride affords mixtures of cis/trans 2-phenyl-3-vinylchromans with moderate yields.
Míriam Álvarez-Corral   +5 more
doaj   +1 more source

Multicomponent synthesis of 4,4-dimethyl sterol analogues and their effect on eukaryotic cells [PDF]

open access: yes, 2014
Most sterols, such as cholesterol and ergosterol, become functional only after the removal of the two methyl groups at C-4 from their biosynthetic precursors.
Alonso, Fernando   +7 more
core   +1 more source

Una reacción multicomponente verde en el laboratorio de química orgánica

open access: yesEducación Química, 2018
En este siglo, los químicos se han encontrado con un nuevo desafío: producir de manera eficiente los materiales necesarios para mantener la calidad de vida de los seres vivos, reduciendo los efectos negativos sobre el medio ambiente y la salud humana. En
Mariana Ingold   +3 more
doaj   +1 more source

Live Cell Imaging Unveils Multiple Domain Requirements for In Vivo Dimerization of the Glucocorticoid Receptor [PDF]

open access: yes, 2014
Glucocorticoids are essential for life, but are also implicated in disease pathogenesis and may produce unwanted effects when given in high doses.
Alvarez, Lautaro Damian   +14 more
core   +3 more sources

A Convenient Synthesis of the Central Core of Helioporins, -Pseudopterosins and Pseudopterosins BCA-Annulation Sequence

open access: yesNatural Product Communications, 2008
A convenient synthesis of the central core of helioporins, seco -pseudopterosins and pseudopterosins in racemic form is reported, using a Suzuki coupling (A-ring formation)-Friedel-Crafts acylation sequence, followed by synthetic elaboration of the ...
Gema Esteban   +3 more
doaj   +1 more source

Precisiones al artículo: “Conceptos básicos y mecanismos de reacción en la Química Orgánica”: Flevorio, Fl, y Livermorio, Lv, dos nuevos elementos aprobados por la IUPAC

open access: yesEducación Química, 2018
Escribimos esta carta con el fin de señalar algunas imprecisiones y de hacer algunos agregados al artículo sobre mecanismos de reacción en la Química Orgánica aparecido en el Vol. 23, Núm. 2, pp. 205-207, 2012 de Educación Química.
Rosa María Aguilar-Garduño   +2 more
doaj   +1 more source

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