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A comparative study on (NHC)Pd(acac)Cl complexes (NHC = N-heterocyclic carbene): indications for the origin of the different reactivity of saturated and unsaturated NHC in cross-coupling reactions
journal contribution
posted on 2023-06-08, 14:57 authored by Ole H Winkelmann, Andrei Riekstins, Steven P Nolan, Oscar NavarroThe synthesis of the new well-defined and air-stable complex (SIPr)Pd(acac)Cl (SIPr = 1,3-bis(2,6-diisopropylphenyl)imidazolin-2-ylidene) is described, and the catalytic activity of this new complex has been tested in the a-arylation of ketones and in Buchwald-Hartwig amination reactions. The significant differences in catalytic performance when compared to the previously reported, unsaturated counterpart (IPr)Pd(acac)Cl (IPr = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene) are discussed by means of X-ray crystallography and on the basis of their varying solution dynamics, observed by 1H NMR spectroscopy.
History
Publication status
- Published
Journal
OrganometallicsISSN
0276-7333Publisher
American Chemical SocietyExternal DOI
Issue
19Volume
28Page range
5809-5813Department affiliated with
- Chemistry Publications
Full text available
- No
Peer reviewed?
- Yes