Friedel Crafts Acylation
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Acilação de Friedel-Crafts do 2-metoxinaftaleno usando o ácido dodecafosfotúngstico suportado em sílica (HPW/SiO2) como catalisador e acetonitrila como solvente
The synthesis of fine chemicals intermediates using Friedel-Crafts acylation is one of the most important methods in chemical technology. In this work, the acylation of 2-methoxynaphthalene with acetic anhydride using a silica-supported dodecatungstophosphoric acid catalyst (HPW/SiO2) and acetonitrila as solvent was studied, showing that this reaction is a f
Química Nova. Publicado em: 2010
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2. Superabsorbent polymer as nanoreactors for preparation of hematite nanoparticles and application of the prepared nanocatalyst for the Friedel-Crafts acylation
Descrevemos a síntese de nanopartículas (30 nm) puras de α-Fe2O3 empregando um nanopolímero superabsorvente (SANP), por decomposição térmica. O α-Fe2O3 sintetizado foi caracterizado por difração de raios X (DRX), infravermelho com transformada de Furrier (IV-TF), microscopia eletrônica de transmissão (TEM) e termogravimetria (TG). A aplicabilidad
Journal of the Brazilian Chemical Society. Publicado em: 2009
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3. Síntese de 1-indanonas através da reação de acilação de Friedel-Crafts intramolecular utilizando NbCl5 como ácido de Lewis
The intramolecular Friedel-Crafts acylation reaction of 3-arylpropanoic acids to give 1-indanones can be effected in good yields under mild conditions (room temperature) by using niobium pentachloride. Our results indicate that NbCl5 acts both as reagent (to transform carboxylic acids into acyl chlorides) and as catalyst in the Friedel-Crafts cyclization.
Química Nova. Publicado em: 2008
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4. Aplicações dos heteropoliácidos do tipo Keggin à acilação Friedel-Crafts e à síntese de chalconas. / Applications of the Keggin type heteropolyacids Friedel-Crafts acylation and synthesis of chalcones.
Os heteropoliácidos são polioxometalatos, compostos de um cluster óxido, com prótons associados, apresentando alta acidez de Brönsted, que tem atraído interesse acadêmico e industrial, devido a capacidade de promover catálise verde, atuando como catalisador homogênea e heterogênea. Diversas reações orgânicas já foram conduzidas neste sistema ca
Publicado em: 2008
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5. Graphite Functionalized in Conditions of Friedel-Crafts Reaction mediated by Radiation of Microwave: New Material for Construction of Electrodes of Carbon Paste / Grafite funcionalizada em condições de Friedel-Crafts mediada por radiação de microondas: novo material para construção de eletrodos de pasta de carbono
Modification and/or functionalization of eletrodic materials have been investigated in order to improve the application of chemically modified electrode (CME) regards on their sensitivity, selectivity and reactivity comparing with unmodified substrate. However, the stability and reproducibility of these CME are one of the most important goals to achieve main
Publicado em: 2007
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6. Síntese de indanos: uma seleção de métodos gerais e eficientes
The indan ring system is present in several compounds with important pharmacological properties. In this account recent examples of selected methods (Friedel-Crafts acylation, cycloaddition reactions, ring contraction, cyclization and resolution) for the synthesis of indans are discussed.
Química Nova. Publicado em: 2005-08
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7. Crisotila como suporte para acidos de Lewis na catalise de reações de Friedel-Crafts
The catalytic alkylation of benzene with benzyl chrolide was studied using chrysotile as a support for Lewis acid. Two methods of immobilization were used: grinding the acid and the support together, and adsorption from an organic solution. Within the acids supported on chrysotile studied, FeCI3, CoCI2 and ZnCl2 have shown good catalytic activity, giving yel
Publicado em: 1994