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    Por favor, use este identificador para citar o enlazar este ítem:http://uvadoc.uva.es/handle/10324/21781

    Título
    Polyphosphazenes for the Stille reaction: A new type of recyclable stannyl reagents
    Autor
    Martínez Arranz, Sheila
    Presa Soto, David
    Carriedo, Gabino A.
    Presa Soto, Alejandro
    Albéniz Jiménez, Ana CarmenAutoridad UVA Orcid
    Año del Documento
    2016
    Editorial
    Royal Society of Chemistry
    Descripción
    Producción Científica
    Documento Fuente
    Dalton Transactions, 2016,45, p.. 2227-2236
    Zusammenfassung
    The random phosphazene copolymer {[N=P((CH2)7-Br)Ph]0,5[N=PMePh]0,5}n (2) and the block copolyphosphazene {[N=P((CH2)7-Br)Ph]25[N=PMePh]20}-b-[N=P(O2C12H8)]55 (5), having a branch with two randomly distributed units, have been synthesized and used as precursors for the stannyl derivatives {[N=P((CH2)7-SnBu2An)Ph]0,5[N=PMePh]0,5}n (3) and {[N=P((CH2)7-SnBu2An)Ph]25[N=PMePh]20}-b-[N=P(O2C12H8)]55 (6, An = p-MeOC6H4). Polymers 3 and 6 were tested as recyclable tin reagents in the Stille cross-coupling reaction with C6H5I, using various Pd catalysts and different experimental conditions. Polymer 6 can be recycled without significant release of tin, but its efficiency decreased after three consecutive cycles. This effect was explained by studying the self-assembly of the polymer under the same conditions used for the catalytic experiments, which evidenced the progressive coalescence of the polymeric vesicles (polymersomes) leading to stable and bigger core-shell aggregates by the attraction of the [N=P(O2C12H8)] rich membranes, thus decreasing the accessibility of the tin active centers.
    Materias (normalizadas)
    Polyphosphazenes
    ISSN
    1477-9226
    Revisión por pares
    SI
    DOI
    10.1039/C5DT02670A
    Patrocinador
    Junta de Castilla y León (programa de apoyo a proyectos de investigación – Ref. VA302U13)
    Ministerio de Economía, Industria y Competitividad (CTQ2014-56345)
    Ministerio de Economía, Industria y Competitividad (CTQ2013-48406-P)
    Universidad de Oviedo (Project UNOV-13-EMERG-GIJON-08)
    Idioma
    eng
    URI
    http://uvadoc.uva.es/handle/10324/21781
    Derechos
    openAccess
    Aparece en las colecciones
    • DEP63 - Artículos de revista [322]
    • CINQUIMA - Artículos de revista [162]
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    Dateien zu dieser Ressource
    Nombre:
    Dalton Trans2016p. 2227 Manuscript before revision.pdf
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    Universidad de Valladolid

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