Results 31 to 40 of about 8,786 (262)

The Synthesis of Some Perhydrobenzimidazolinium Salts and Their Application in Pd-Carbene Catalyzed Heck and Suzuki Reactions

open access: yesMolecules, 2009
Novel 1,3-dialkylperhydrobenzimidazolinium chloride salts were prepared as precursors of N-heterocyclic carbenes 3a-e by reacting N,N’-dialkylcyclohexandiamine, triethyl orthoformate and ammonium chloride.
Murat Yiğit
doaj   +1 more source

Synthesis of Platinum(II) N-Heterocyclic Carbenes Based on Adenosine

open access: yesMolecules, 2021
Organometallic derivatization of nucleosides is a highly promising strategy for the improvement of the therapeutic profile of nucleosides. Herein, a methodology for the synthesis of metalated adenosine with a deprotected ribose moiety is described ...
Maria Inês P. S. Leitão   +3 more
doaj   +1 more source

The double role of ionic liquids in organic electrosynthesis: Precursors of N-heterocyclic carbenes and green solvents. Henry reaction [PDF]

open access: yes, 2009
N-heterocyclic carbenes, electrogenerated by cathodic reduction of imidazolium-based room temperature ionic liquids (RTILs), are stable bases able to catalyze the Henry reaction.
FEROCI, Marta   +3 more
core   +1 more source

N-Heterocyclic carbene/Brønsted acid cooperative catalysis as a powerful tool in organic synthesis

open access: yesBeilstein Journal of Organic Chemistry, 2012
The interplay between metals and N-heterocyclic carbenes (NHCs) has provided a window of opportunities for the development of novel catalytic strategies within the past few years.
Rob De Vreese, Matthias D’hooghe
doaj   +1 more source

Electrochemical deposition of N-heterocyclic carbene monolayers on metal surfaces

open access: yesNature Communications, 2020
N-heterocyclic carbenes (NHCs) have been widely used for the formation of monolayers but self-assembly methods come with drawbacks such as need for dry environment or using specifically-synthesized precursors.
Einav Amit   +11 more
doaj   +1 more source

A simple access to transition metal cyclopropenylidene complexes [PDF]

open access: yes, 2015
The authors gratefully acknowledge the Royal Society (University Research Fellowship to CSJC) and the DOE (DE-FG02-13ER16370) for financial support.We report the first example of BAC–Cu complex (BAC = bis(diisopropylamino)cyclopropenylidene) and its use ...
Slawin, Alexandra MZ   +12 more
core   +1 more source

Enantioselective [3+3] atroposelective annulation catalyzed by N-heterocyclic carbenes

open access: yesNature Communications, 2018
Axially chiral compounds are commonly found in nature. Here, the authors show the highly enantioselective construction of axially chiral biaryls via an N-heterocyclic carbenes-catalyzed [3+3] atroposelective annulation of ynals with cyclic 1,3-diones.
Changgui Zhao   +5 more
doaj   +1 more source

Direct Synthesis of N‐Heterocyclic Carbene‐Stabilized Copper Nanoparticles from an N‐Heterocyclic Carbene–Borane [PDF]

open access: yesChemistry – A European Journal, 2019
AbstractN‐Heterocyclic carbene (NHC)‐stabilized copper nanoparticles (NPs) were synthesized from an NHC–borane adduct and mesitylcopper(I) under thermal conditions (refluxing toluene for 2.5 h). NPs with a size distribution of 11.6±1.8 nm were obtained. The interaction between Cu NPs and NHC ligands was probed by X‐ray photoelectron spectroscopy, which
Frogneux, Xavier   +9 more
openaire   +3 more sources

Rate and equilibrium constants for the addition of N-heterocyclic carbenes into benzaldehydes : a remarkable 2-substituent effect [PDF]

open access: yes, 2015
We thank the Royal Society for a University Research Fellowship (ADS), the EPSRC (CJC and RM) grant number EP/G013268/1 and the European Research Council under the European Union's Seventh Framework Programme (FP7/2007-2013) ERC grant agreement no 279850
Collett, Christopher John   +17 more
core   +2 more sources

Sydnone Methides—A Forgotten Class of Mesoionic Compounds for the Generation of Anionic N‐Heterocyclic Carbenes [PDF]

open access: yes, 2021
Sydnone methides are described from which only one single example has been mentioned in the literature so far. Their deprotonation gave anions which can be formulated as π-electron rich anionic N-heterocyclic carbenes.
Andreas Schmidt   +11 more
core   +3 more sources

Home - About - Disclaimer - Privacy