2024-03-28T19:47:10Zhttps://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/217272021-05-21T21:34:26Zcom_10324_1186com_10324_931com_10324_894com_10324_28542com_10324_952col_10324_1404col_10324_28543
Ramiro Mangas, Zoraida Rosa
Bartolomé Albistegui, María del Camino
Espinet Rubio, Pablo
2016-12-14T13:07:55Z
2016-12-14T13:07:55Z
2014
European Journal of Inorganic Chemistry, 2014, vol. 2014, Issue 32, p. 5499–5506
1434-1948
http://uvadoc.uva.es/handle/10324/21727
10.1002/ejic.201402744
5499
5506
European Journal of Inorganic Chemistry
2014
Producción Científica
HBHC (Hydrogen Bond supported Heterocyclic Carbene) and NAC (Nitrogen Acyclic Carbene) neutral gold complexes have been synthesized by reaction of isocyanogold derivatives ([AuCl(CNR)] with amines. Cationic complexes [Au(carbene)(AsPh3)](SbF6) have been also prepared. The catalytic activity of both types of complex (for the former AgSbF6 is used to extract the halide) in skeletal rearrangement and methoxycyclization of enynes has been studied. The cationic complexes with AsPh3 are active but slower; as an advantage they do not decompose during the catalysis. In contrast, the catalysts formed in situ from the halide neutral complexes are very fast but undergo decomposition. An interesting trade-off was found by adding sub-stoichiometric amounts of AsPh3 (e.g. 10 mol%) relative to the gold catalyst ([Au(carbene)Cl] + AgSbF6), which prevents or dramatically reduces the decomposition observed. This protecting ligand promises to prevent or minimize undesired decomposition of gold catalysts.
Ministerio de Economía, Industria y Competitividad (CTQ2013-48406-P)
Junta de Castilla y León (programa de apoyo a proyectos de investigación – Ref. VA256U13)
application/pdf
eng
Wiley-VCH Verlag
info:eu-repo/semantics/restrictedAccess
© Wiley-VCH Verlag
Carbene ligands
Arsenic
Protection of the gold (I) Catalyst by AsPh3 in Reactions of Enynes
info:eu-repo/semantics/article
http://onlinelibrary.wiley.com/doi/10.1002/ejic.201402744/full
SI