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Grafting of Copper(I)–NHC Species on MCM‐41: Homogeneous versus Heterogeneous Catalysis
Author(s) -
Garcés Karin,
FernándezAlvarez Francisco J.,
GarcíaOrduña Pilar,
Lahoz Fernando J.,
PérezTorrente Jesús J.,
Oro Luis A.
Publication year - 2015
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201500508
Subject(s) - hydrosilylation , cycloaddition , catalysis , carbene , phenylacetylene , chemistry , acetophenone , homogeneous catalysis , copper , heterogeneous catalysis , azide , medicinal chemistry , polymer chemistry , organic chemistry
The copper(I) complexes [Cu(X){2,6‐diisopropylphenyl–NHC–(CH 2 ) 3 Si(O i Pr) 3 }] (X=Cl ( 2 a ); I ( 2 b ), NHC=N‐heterocyclic carbene) have been synthesized and characterized. Furthermore, the structure of 2 b has been confirmed by X‐ray diffraction studies. Complex 2 a has been successfully anchored in MCM‐41 to afford 2 –MCM‐41. The activity of both the homogeneous, 2 a , and heterogeneous, 2 –MCM‐41, catalysts in acetophenone hydrosilylation with HSiEt 3 and [3+2] cycloaddition of benzyl azide and phenylacetylene has been investigated. The heterogeneous catalyst exhibits catalytic activity for the cycloaddition reaction though, unexpectedly, shows no catalytic activity for hydrosilylation.