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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
11
pubmed:dateCreated
2008-6-2
pubmed:abstractText
An efficient new methodology for the arylation of aldehydes is disclosed which uses dirhodium(II) catalysts and N-heterocyclic carbene (NHC) ligands. Complexes of Rh 2(OAc) 4 with one and two NHCs attached on the axial positions were successfully isolated, fully characterized, and used as catalysts in the reaction. The saturated monocomplex ((NHC 5)Rh 2(OAc) 4) 31 was shown to be the most active catalyst and was particularly efficient in the arylation of alkyl aldehydes. DFT calculations support participation of complexes with one axial NHC in the reaction as the catalysts active species and indicate that hydrogen bonds involving dirhodium unit, reactants, and solvent (alcohol) play an important role on the reaction mechanism.
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Jun
pubmed:issn
0022-3263
pubmed:author
pubmed:issnType
Print
pubmed:day
6
pubmed:volume
73
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
4076-86
pubmed:year
2008
pubmed:articleTitle
Axial coordination of NHC ligands on dirhodium(II) complexes: generation of a new family of catalysts.
pubmed:affiliation
CQFM and CQE, Departamento de Engenharia Química e Biológica, Complexo I, Instituto Superior Técnico, Av. Rovisco Pais 1, Lisbon, Portugal.
pubmed:publicationType
Journal Article