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Medientyp:
E-Artikel
Titel:
Trispyrazolylborate Ligands Supported on Vinyl Addition Polynorbornenes and Their Copper Derivatives as Recyclable Catalysts
Beteiligte:
Molina de la Torre, Jesús A.;
Pérez‐Ortega, Ignacio;
Beltrán, Álvaro;
Rodríguez, Manuel R.;
Díaz‐Requejo, M. Mar;
Pérez, Pedro J.;
Albéniz, Ana C.
Erschienen:
Wiley, 2019
Erschienen in:
Chemistry – A European Journal, 25 (2019) 2, Seite 556-563
Sprache:
Englisch
DOI:
10.1002/chem.201803852
ISSN:
1521-3765;
0947-6539
Entstehung:
Anmerkungen:
Beschreibung:
AbstractPolynorbornenes prepared by vinyl addition polymerization and bearing pendant alkenyl groups serve as skeletons to support trispyrazolylborate ligands (Tpx) built at those alkenyl sites. Reaction with CuI in acetonitrile led to VA‐PNB–TpxCu(NCMe) (VA‐PBN=vinyl addition polynorbornene) with a 0.8–1.4 mmol incorporation of Cu per gram of polymer. The presence of tetracoordinated copper(I) ions was been assessed by FTIR studies on the corresponding VA‐PNB‐TpxCu(CO) adducts, in agreement with those on discrete TpxCu(CO). The new materials were employed as heterogeneous catalysts in several carbene‐ and nitrene‐transfer reactions, showing a behavior similar to that of the homogeneous counterparts but also being recycled several times maintaining a high degree of activity and selectivity. This is the first example of supported Tpx ligands onto polymeric supports with catalytic applications.