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Copper Bis(oxazoline) Encapsulated in Zeolites and Its Application as Heterogeneous Catalysts for the Cyclopropanation of Styrene

2011-10-19Journal article Open access
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dc.contributor.authorSilva, Ana Rosa
dc.contributor.authorAlbuquerque, Hélio
dc.contributor.authorFontes, Andre
dc.contributor.authorBorges, Susana
dc.contributor.authorMartins, Angela
dc.contributor.authorCarvalho, Ana Paula
dc.contributor.authorPires, João
dc.date.accessioned2013-01-31T13:10:47Z
dc.date.available2013-01-31T13:10:47Z
dc.date.issued2011-10-19
dc.description.abstractA copper C(2)-symmetric bis(oxazoline), CuBox, was introduced in two forms of commercial Y zeolite: a sodium form (NaY) and an ultrastable form (NaUSY). CuBox was introduced by first partially exchanging the sodium cations of both zeolites for copper and then by refluxing the obtained materials with a solution of bis(oxazoline) (Box). Two different loadings were prepared for each form of zeolite. The materials were characterized by copper ICP-AES, elemental analysis, XPS, FTIR, TG, and nitrogen adsorption isotherms at -196 degrees C. Evidence for Box ligand location in the supercages of NaY and NaUSY zeolites and its coordination to the exchanged copper(II) was obtained by the several techniques used. The materials were all active in the cyclopropanation of styrene with ethyldiazoacetate at room temperature and diastereoselective toward trans cydopropanes. Although the materials containing Box showed low enantioselectivities, their catalytic activities were higher than the parent copper exchanged zeolites, and did not decrease with reuse, at least during three consecutive cycles.por
dc.identifier.citationSILVA, Ana Rosa; ALBUQUERQUE, Hélio; FONTES, André; BORGES, Susana; MARTINS, Angela; CARVALHO, Ana Paula; PIRES, João - Copper Bis(oxazoline) Encapsulated in Zeolites and Its Application as Heterogeneous Catalysts for the Cyclopropanation of Styrene. Industrial Engineering Chemistry Research. ISSN 0888-5885. Vol. 50, n.º 20 (2011) p. 11495-11501.por
dc.identifier.issn0888-5885
dc.identifier.urihttp://hdl.handle.net/10400.21/2125
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherAmer Chemical Socpor
dc.subjectEnantioselective Catalysispor
dc.subjectChiral Catalystspor
dc.subjectPillared Clayspor
dc.subjectComplexespor
dc.subjectEpoxidationpor
dc.subjectAziridinationpor
dc.subjectBisoxazolinespor
dc.subjectOlefinspor
dc.titleCopper Bis(oxazoline) Encapsulated in Zeolites and Its Application as Heterogeneous Catalysts for the Cyclopropanation of Styrenepor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceWashingtonpor
oaire.citation.endPage11501por
oaire.citation.issue20por
oaire.citation.startPage11495por
oaire.citation.titleIndustrial Engineering Chemistry Researchpor
oaire.citation.volume50por
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor

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