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Verfasst von:Zargaran, Poorya [VerfasserIn]   i
 Wurm, Thomas [VerfasserIn]   i
 Zahner, David [VerfasserIn]   i
 Schießl, Jasmin [VerfasserIn]   i
 Rudolph, Matthias [VerfasserIn]   i
 Rominger, Frank [VerfasserIn]   i
 Hashmi, A. Stephen K. [VerfasserIn]   i
Titel:A structure-based activity study of highly active unsymmetrically substituted NHC gold(I) catalysts
Verf.angabe:Poorya Zargaran, Thomas Wurm, David Zahner, Jasmin Schießl, Matthias Rudolph, Frank Rominger, A. Stephen K. Hashmi
Jahr:2018
Jahr des Originals:2017
Umfang:6 S.
Fussnoten:Published online: 26 September 2017 ; Gesehen am 27.08.2018
Titel Quelle:Enthalten in: Advanced synthesis & catalysis
Ort Quelle:Weinheim : Wiley-VCH, 2001
Jahr Quelle:2018
Band/Heft Quelle:360(2018), 1, Seite 106-111
ISSN Quelle:1615-4169
Abstract:Following the modular template synthesis using isonitriles, new unsymmetrically substituted five-membered saturated N-heterocyclic carbene (NHC) and N-heterocyclic oxo-carbene (NHOC) gold(I) complexes were prepared. With these species and already reported complexes, a detailed study concerning the catalytic activities of the complex classes available by the isonitrile route was conducted. The catalytic properties of twelve different types of NHOCs, saturated and unsaturated NHC gold(I) pre-catalysts with different substituents, as well as one representative of a six-membered NHC and one N-acyclic carbene (NAC) gold(I) complex were analyzed by utilizing the phenol synthesis as a test reaction. For this reaction, the saturated NHC gold(I) complexes achieved higher conversions than the corresponding unsaturated NHCs and the NHOC systems. While unsaturated NHC complexes show higher catalytic activity during the initial phase of the conversion, due to a higher stability, higher turnover numbers (TONs) were obtained for the corresponding saturated systems. A cyclopentadecyl substituent at nitrogen turned out to be the privileged substituent for all of the unsymmetrical complexes. Furthermore, we detected that light exclusion can significantly increase the catalytic activity of NHC gold(I) complexes for phenol synthesis.
DOI:doi:10.1002/adsc.201701080
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext ; Verlag: http://dx.doi.org/10.1002/adsc.201701080
 Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/adsc.201701080
 DOI: https://doi.org/10.1002/adsc.201701080
Datenträger:Online-Ressource
Sprache:eng
Sach-SW:catalyst stability
 gold catalysts
 gold complexes
 N-heterocyclic carbenes
 phenol synthesis
K10plus-PPN:1580401562
Verknüpfungen:→ Zeitschrift

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