186354-60-9Relevant academic research and scientific papers
Identification of 1,3-dialkylimidazoIium salt supramolecular aggregates in solution
Consorti, Crestina S.,Suarez, Paulo A. Z.,De Souza, Roberte F.,Burrow, Robert A.,Farrar, David H.,Lough, Alan J.,Loh, Watson,da Silva, Luis H.M.,Dupont, Jairton
, p. 4341 - 4349 (2005)
The nature of the interactions between 1,3-dialkylimidazolium cations and noncoordinating anions such as tetrafluoroborate, hexafluorophosphate, and tetraphenylborate has been studied in the solid state by X-ray diffraction analysis and in solution by su
Synthesis, Characterization, and Catalytic Activity of Chiral NHC Platinum(II) Pyridine Dihalide Complexes
Blanc, Aurélien,De Frémont, Pierre,Hatey, Delphine,Pale, Patrick,Pertschi, Romain
supporting information, (2020/03/16)
A series of platinum(II) dihalide pyridine complexes bearing chiral C2-symmetric N-heterocyclic carbene (NHC) ligands [Pt(NHC*)(Py)(Hal)2] was synthesized in a one-pot procedure and characterized by NMR spectroscopy and single crystal X-ray diffraction (SC-XRD). The complexes were tested for the asymmetric cycloisomerization of enynol into bicyclo[3.1.0]hexanone and feature an excellent catalytic activity at room temperature along with a modest enantiomeric induction (up to 39% ee).
Some insights into the gold-catalysed A3-coupling reaction
Price, Gregory A.,Brisdon, Alan K.,Randall, Simon,Lewis, Edward,Whittaker, Daniel M.,Pritchard, Robin G.,Muryn, Chris A.,Flower, Kevin R.,Quayle, Peter
supporting information, p. 251 - 262 (2017/07/06)
A series of cyclometallated and functionalised NHC gold(I) and gold(III) complexes, many of which feature chiral ligands, and their application to A3-coupling reactions is presented. Gold(III) complexes were found to be particularly effective catalysts for the coupling in a range of solvents, however no asymmetric induction was obtained when using chiral gold complexes and the rate of product formation was found to be similar even when using different ligand systems. In-situ NMR analysis of these reactions indicates that decomposition of the catalyst occurs during the course of the reaction while TEM studies revealed the presence of gold nanoparticles in crude reaction mixtures. Taken together these data suggest that the gold nanoparticles, rather than the intact gold complexes, could be the catalytically active species, and if so this may have significant implications for other gold-catalysed systems.
Enantioselective copper catalysed 1,4-conjugate addition reactions using chiral N-heterocyclic carbenes
Winn, Caroline L.,Guillen, Frédéric,Pytkowicz, Julien,Roland, Sylvain,Mangeney, Pierre,Alexakis, Alexandre
, p. 5672 - 5695 (2007/10/03)
The preparation of a variety of chiral N-heterocyclic carbene (NHC) precursors is described. The relative merits of imidazolinium salts and silver carbenes as NHC precursors are discussed with respect to their synthesis, stability and performance in the copper catalysed conjugate addition of dialkyl zinc reagents to a variety of Michael acceptors. Enantioselectivities of up to 93% were achieved using as little as 4% of chiral ligand.
Process for preparing heterocyclic carbenes
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, (2008/06/13)
PCT No. PCT/EP97/01296 Sec. 371 Date Nov. 2, 1998 Sec. 102(e) Date Nov. 2, 1998 PCT Filed Mar. 14, 1997 PCT Pub. No. WO97/34875 PCT Pub. Date Sep. 25, 1997A process for preparing heterocyclic carbenes of the in which R1, R2, R3 and R4 are individually sat
Chirale Heterocyclencarbene in der asymmetrischen Homogenkatalyse
Herrmann, Wolfgang A.,Goossen, Lukas J.,Koecher, Christian,Artus, Georg R. J.
, p. 2980 - 2982 (2007/10/03)
Keywords: Asymmetrische Katalyse; Carbenkomplexe; Homogene Katalyse; Hydrosilylierung; Rhodiumkomplexe
