2 Isoxazolines
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. The 1,3-Dipolar Cycloaddition of Nitrile Oxide to Vinylacetic Acid: Computational Study of Transition States Selectivity, Solvent Effects, and Bicyclo Formation
The 1,3-dipolar cycloaddition reaction is a powerful tool for the cycloaddition of nitrile oxides to olefins, and this reaction is of considerable interest to obtain isoxazolines. Density functional theory (DFT) was used to study the 1,3-dipolar cycloaddition reaction mechanism that initially occurs between benzonitrile oxide and vinylacetic acid to yield a
J. Braz. Chem. Soc.. Publicado em: 2016-06
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2. Síntese e caracterização de novos polímeros líquido-cristalinos de cadeia lateral derivados do heterociclo 2-isoxazolínico 3,5-dissubstituído
This thesis presents the synthesis and characterization of new polymer liquid crystal materials based on heterocycle 2-isoxazoline 3,5-disubstituted. We studied the inversion effects of groups linked in position 3 and 5 in 2-isoxazoline in the mesogenic group attached by side chain polymer liquid crystal and the influence in liquid crystals properties. The m
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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3. ESTUDO DO COMPORTAMENTO QUÍMICO DE HETEROCICLOS TRIFLUORMETIL SUBSTITUÍDOS EM REAÇÕES COM DAST / STUDY OF THE CHEMICAL BEHAVIOR OF TRIFLUOROMETHYL SUBSTITUTED HETEROCYCLES IN REACTIONS WITH DAST
This work describes the study of the chemical behavior of trifluoromethyl substituted heterocycles as 1H-pyrazoles, 2-pyrazolines, 2H-cromenones and isoxazolines in reactions with DAST, with the aim of evaluating possible reactions in the oxygenated sites, aiming mainly the insertion of fluorine atoms in these molecules. Trifluoromethylated heterocycle precu
Publicado em: 2011
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4. 3-arylisoxazolyl-5-carboxylic acid and 5-(hydroxymethyl)-3-aryl-2-isoxazoline as molecular platforms for liquid-crystalline materials
A síntese de uma plataforma molecular para materiais líquido-cristalinos derivados do ácido 3-arilisoxazolil-5-carboxílico (1) e do 5-(hidroximetil)-3-aril-2-isoxazolina (2) é descrita. Os intermediários 1 e 2 são obtidos através da reação de cicloadição [3+2] 1,3-dipolar entre arilóxidos de nitrilas e os dipolarófilos ácido acrílico e álcoo
Publicado em: 2010
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5. SÃntese assimÃtrica de 3-carboxamidas enantiomericamente puras e de hidrazidas e arilhidrazonas, derivadas do novo heterociclo 7-(benzoil)- 2-isoxazolina[5,4-b] pirrolidina. AvaliaÃÃo das atividades biolÃgicas
In our previous studies, aza-bicyclic 2-isoxazolines were obtained, such as, 2- isoxazoline[5,4-b] piperidine and 2-isoxazoline[5,4-b] pyrrolidine. N-(benzoyl)-amides and, derived from these heterocycles, showed promising biological activity, (anti-inflammatory and toxicity). Compounds containing hydrazide and hydrazone functionalities are described in the l
Publicado em: 2008
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6. SÃntese e avaliaÃÃo do potencial biolÃgico de novos derivados N-fenacilados do aza-biciclo pirrolidino [3,2-d] isoxazolina
Recently, our group of research had been gotten N-(benzoyl)-pyrrolidine[3,2-d]-2- isoxazolines derivatives 40, by 1,3-dipolar cycloaddition of five membered endociclic enecarbamates and enamides, with excellent biological activities. Due to this fact, we intended the obtention of the derivatives N-(fenacyl)-pyrrolidine[3,2-d]-2-isoxazolines 41, using the aza
Publicado em: 2005