Results 31 to 40 of about 13,617,516 (263)

A simple access to transition metal cyclopropenylidene complexes [PDF]

, 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, Bertrand , Guy, Cazin, Catherine S.J., Cordes, David B, Bidal, Yannick Daniel, Cordes, David Bradford, Cazin, Catherine, Slawin, Alexandra Martha Zoya, Bidal, Yannick D, Cazin, CatherineWE060001614845868020023665330000-0002-9094-8131A857376E-5833-11E6-A7EF-CE99B5D1D7B1, Bertrand, Guy, Lesieur, Mathieu, Melaimi, Mohand   +12 more
core   +1 more source

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

Nature 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, Donghui Guo, Kristin Munkerup, Kuo-Wei Huang, Fangyi Li, Jian Wang   +5 more
doaj   +1 more source

NHC-catalysed highly selective aerobic oxidation of nonactivated aldehydes

Beilstein Journal of Organic Chemistry, 2013
This publication describes a highly selective oxidation of aldehydes to the corresponding acids or esters. The reaction proceeds under metal-free conditions by using N-heterocyclic carbenes as organocatalysts in combination with environmentally friendly ...
Lennart Möhlmann, Stefan Ludwig, Siegfried Blechert   +2 more
doaj   +1 more source

Synthesis of C2-Symmetric Benzimidazolium Salts and Their Application in Palladium-Catalyzed Enantioselective Intramolecular α-Arylation of Amides

Molecules, 2016
A series of C2-symmetric chiral benzimidazolium salts, the precursor of N-heterocyclic carbene ligands, were designed and synthesized from 1,2-dibromobenzene.
Weiping He, Wei Zhao, Bihui Zhou, Haifeng Liu, Xiangrong Li, Linlin Li, Jie Li, Jianyou Shi   +7 more
doaj   +1 more source

Anti-proliferative Activity of N-Heterocyclic Carbenes Derived from Guanosine [PDF]

, 2018
Palladium(II) and platinum(II) complexes bearing N-heterocyclic carbene derived from Guanosine are synthesized via oxidative addition. Cytotoxicity of the compounds is evaluated with human embryonic kidney (HEK293) cells, glioblastoma (U251) cervical ...
Federico, Herrera, Ana, Petronilho, Maria Inês, Leitão   +2 more
core   +1 more source

Catalisadores contendo carbenos n-heterocíclicos como ligantes: propriedades, sínteses, aplicações e comparação com outros ligantes Catalysts containing n-heterocyclic carbenes as ligands: properties, syntheses, applications and comparison with other catalysts

Química Nova, 2008
N-heterocyclic carbenes (NHCs) have become of considerable importance in modern organometallic chemistry and homogeneous catalysis. There are several advantages in the use NHCs over their phosphorus analogues, which explains the enormous development of ...
Julio Cezar Pastre, Carlos Roque Duarte Correia   +1 more
doaj   +1 more source

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

Chemistry – 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, Hippolyte, Laura, Mercier, Dimitri, Portehault, David, Chanéac, Corinne, Sanchez, Clément, Marcus, Philippe, Ribot, François, Fensterbank, Louis, Carenco, Sophie   +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]

, 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, Taylor, James E., Massey, Richard S, Collett, C.J., Taylor, James Edward, Massey, R.S., Maguire, Oliver R, Smith, A.D., Collett, Christopher J., Taylor, J.E., Massey, Richard S., Smith, Andrew D., Smith, Andrewv D., O'Donoghue, Ann Marie C., O'Donoghue, A.C., O'Donoghue, AnnMarie C, Maguire, Oliver R.; id_orcid, Maguire, O.R.   +17 more
core   +1 more source

NHCs Catalyzed Hydrophosphonylation of α-Ketoesters and α-Trifluoromethyl Ketones

The Scientific World Journal, 2013
N-Heterocyclic carbenes catalyzed hydrophosphonylation reaction of α-ketoesters and α-trifluoromethyl ketones was developed. Under the catalysis of 10 mol% IPr, α-ketoesters or α-trifluoromethyl ketones reacted with dialkyl phosphites to provide ...
Lin He, Zhi-Hua Cai, Ji-Xin Pian, Guang-Fen Du   +3 more
doaj   +1 more source

Breaking boundaries in ammonia production at ambient conditions: Exploring pristine carbon allotropes as catalyst

Sustainable Chemistry for the Environment
The synthesis of ammonia from molecular nitrogen and hydrogen under ambient conditions remains one of the greatest challenges in chemical method development. Notable successes have been achieved using transition metal complexes.
Amrita Pathak, Saswati Garai, Arpit Dutta, Arijit Bag   +3 more
doaj   +1 more source