dc.contributor.author |
Fernández Wang, Martí |
dc.contributor.author |
Ferré Romeu, Meritxell |
dc.contributor.author |
Pla i Quintana, Anna |
dc.contributor.author |
Parella Coll, Teodor |
dc.contributor.author |
Pleixats i Rovira, Roser |
dc.contributor.author |
Roglans i Ribas, Anna |
dc.date |
2014 |
dc.identifier |
https://ddd.uab.cat/record/157816 |
dc.identifier |
10.1002/ejoc.201402649 |
dc.identifier |
oai:ddd.uab.cat:157816 |
dc.identifier |
ARE-76450 |
dc.identifier |
10990690v2014n28p6242 |
dc.identifier |
84922319668 |
dc.identifier |
000342842500015 |
dc.identifier |
oai:egreta.uab.cat:publications/1bdb2b43-e5f5-46be-898a-a931d41c69eb |
dc.format |
application/pdf |
dc.language |
eng |
dc.publisher |
|
dc.relation |
Ministerio de Ciencia e Innovación CSD2007-00006 |
dc.relation |
Ministerio de Ciencia e Innovación CTQ2009-07881 |
dc.relation |
Ministerio de Ciencia e Innovación CTQ2011-22649 |
dc.relation |
Ministerio de Ciencia e Innovación CTQ2011-23121 |
dc.relation |
Ministerio de Ciencia e Innovación CTQ2012-32436 |
dc.relation |
Agència de Gestió d'Ajuts Universitaris i de Recerca 2009/SGR-637 |
dc.relation |
Agència de Gestió d'Ajuts Universitaris i de Recerca 2009/SGR-1441 |
dc.relation |
European journal of organic chemistry ; Vol. 2014, Issue 28 (Aug. 2014), p. 6242-6251 |
dc.rights |
open access |
dc.rights |
Tots els drets reservats. |
dc.rights |
https://rightsstatements.org/vocab/InC/1.0/ |
dc.subject |
Heterogeneous catalysis |
dc.subject |
Supported catalysts |
dc.subject |
Sol-gel processes |
dc.subject |
Rhodium |
dc.subject |
Cycloaddition |
dc.subject |
Carbenes |
dc.title |
Rhodium-NHC hybrid silica materials as recyclable catalysts for [2+2+2] cycloaddition reactions of alkynes |
dc.type |
Article |
dc.description.abstract |
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, N₂-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. |