RT Journal Article
T1 Trispyrazolylborate Ligands Supported on Vinyl Addition Polynorbornenes and Their Copper Derivatives as Recyclable Catalysts
A1 Molina de la Rorre, Jesús A.
A1 Pérez Ortega, Ignacio
A1 Beltrán Martín, Álvaro
A1 Ramírez Rodríguez, Manuel
A1 Díaz Requejo, María Mar
A1 Pérez Romero, Pedro José
A1 Albéniz, Ana C.
AB Polynorbornenes prepared by vinyl addition polymerization and bearing pendant alkenyl groups serve as skeletons to support trispyrazolylborate ligands (Tp(x)) built at those alkenyl sites. Reaction with CuI in acetonitrile led to VA-PNB-Tp(x)Cu(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-Tp(x)Cu(CO) adducts, in agreement with those on discrete Tp(x)Cu(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 Tp(x) ligands onto polymeric supports with catalytic applications.
PB Wiley
SN 0947-6539
SN 1521-3765 (electrónico)
YR 2019
FD 2019
LK http://hdl.handle.net/10272/15979
UL http://hdl.handle.net/10272/15979
LA eng
NO Molina de la Torre, J. A., Pérez-Ortega, I., Beltrán, Á., Rodríguez, M. R., Díaz-Requejo, M. M., Pérez, P. J., & Albéniz, A. C. (2018). Trispyrazolylborate Ligands Supported on Vinyl Addition Polynorbornenes and Their Copper Derivatives as Recyclable Catalysts. Chemistry - A European Journal, 25(2), 556-563. https://doi.org/10.1002/chem.201803852
NO The authors would like to thank the financial support of the MINECO (CTQ2017-82893-C2-1-R, CTQ2016-80913-P and Red Intecat CTQ2016-81923-REDC), the JCyL (VA051P17, VA062G18) and the EU (CHAOS COST ACTION CA-15106).
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026