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Ministerio de Ciencia e Innovación (Espanya)
Generalitat de Catalunya. Agència de Gestió d’Ajuts Universitaris i de Recerca |
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Fernández Wang, MartÃ
Ferré Romeu, Meritxell Pla i Quintana, Anna Parella Coll, Teodor Pleixats, Roser Roglans i Ribas, Anna |
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2014 | |
Bis-silylated dihydroimidazolium salt 1 and monosilylated imidazolium salt 2 are transformed to (NHC)RhCl(COD) complexes 3 and 4, allowing the preparation of hybrid silica materials either by sol-gel or grafting processes. Full characterization of the materials by means of solid state NMR, N-2-sorption measurements, thermogravimetric analysis (TGA) and elemental analysis was followed by evaluation of catalytic activity in the [2+2+2] cycloaddition of alkynes. Excellent yields of the cycloadducts are obtained for up to six consecutive cycles with the grafted material, using simple filtration to recover the catalyst. Both conventional and microwave heating prove effective for the process described Financial support from the Spanish Ministerio de Ciencia e Innovacion (MICINN) (grant numbers CTQ2011-23121, CTQ2009-07881, CTQ2012-32436, CTQ2011-22649, CSD2007-00006) and by the Generalitat de Catalunya (grant numbers 2009SGR637, 2009SGR1441, and predoctoral grant to M. Fernandez) is acknowledged. M. Ferre thanks the Universitat Autonoma de Barcelona for a predoctoral scholarship |
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application/pdf | |
http://hdl.handle.net/10256/11333 | |
eng | |
Wiley-VCH Verlag | |
info:eu-repo/semantics/altIdentifier/doi/10.1002/ejoc.201402649 info:eu-repo/semantics/altIdentifier/issn/1434-193X info:eu-repo/semantics/altIdentifier/eissn/1099-0690 AGAUR/2009-2014/2009 SGR-637 |
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info:eu-repo/grantAgreement/MICINN//CTQ2011-23121/ES/APLICACIONES CATALITICAS DE COMPUESTOS DE RODIO, PALADIO Y NIQUEL EN SINTESIS ORGANICA. METODOLOGIA Y ESTUDIOS MECANISTICOS./ | |
Tots els drets reservats | |
Catà lisi heterogènia
Heterogeneous catalysis Catalitzadors de rodi Rhodium catalyst Reaccions d’addició Addition reactions Rodi Rhodium Ciclització (QuÃmica) Ring formation (Chemistry) |
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Rhodium-NHC Hybrid Silica Materials as Recyclable Catalysts for [2+2+2] Cycloaddition Reactions of Alkynes | |
info:eu-repo/semantics/article | |
DUGiDocs |