Simple halogen-free synthesis of aryl cinnamates using Mo-Keggin heteropoly acids as catalyst

dc.creatorPalermo, Valeria
dc.creatorRuiz, Diego Manuel
dc.creatorAutino, Juan Carlos
dc.creatorVázquez, Patricia Graciela
dc.creatorRomanelli, Gustavo Pablo
dc.date2012
dc.date2019-10-29T13:44:14Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/84289
dc.identifierissn:0033-4545
dc.descriptionA convenient chlorine-free procedure for the direct esterification of cinnamic acids with phenols is described. The method does not require stoichiometric activation of the carboxyl group with thionyl chloride or condensing reagents. The methodology is very simple, environmentally friendly, and high-yielding for both electron-releasing and -withdrawing substituted phenols. The Keggin heteropoly acids H 3PMo 12O 40 and H 4SiMo 12O 40 were employed as catalyst in simple bulk form. The effects of temperature, reaction time, and amount of the catalyst used on the ester yield were checked. Suitable conditions for the reaction include a 1:1 molar ratio of reactants and a 1 mmol % of catalyst to reactant ratio. Seventeen aryl cinnamates were obtained, yields ranged from 80 to 91 % for most of the esters. The catalyst was shown to be reusable for at least four times without any appreciable loss of its activity.
dc.descriptionCentro de Investigación y Desarrollo en Ciencias Aplicadas
dc.descriptionFacultad de Ciencias Agrarias y Forestales
dc.formatapplication/pdf
dc.format529-540
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by-nc-sa/4.0/
dc.rightsCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.subjectQuímica
dc.subjectAcid catalysis
dc.subjectChlorine-free organic synthesis
dc.subjectCinnamates
dc.subjectDirect esterification
dc.subjectKegginheteropoly acids
dc.titleSimple halogen-free synthesis of aryl cinnamates using Mo-Keggin heteropoly acids as catalyst
dc.typeArticulo
dc.typeArticulo


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