Alkylfluorenyl substituted N-heterocyclic carbenes in copper(i) catalysed hydrosilylation of aldehydes and ketones

2015 ◽  
Vol 44 (31) ◽  
pp. 13991-13998 ◽  
Author(s):  
Matthieu Teci ◽  
Nicolas Lentz ◽  
Eric Brenner ◽  
Dominique Matt ◽  
Loïc Toupet
Keyword(s):  
Copper Complex ◽  
Carbonyl Compounds ◽  
Cost Effective ◽  
Heterocyclic Carbenes ◽  
Sterically Demanding ◽  
Aldehydes And Ketones

An alkylfluorenyl-substituted imidazolylidene copper complex efficiently catalyses the hydrosilylation of functionalized and/or sterically demanding carbonyl compounds, using triethylsilane as cost-effective hydride source; the catalyst displays remarkable stability.

Au/TiO2 catalyzed reductive amination of aldehydes and ketones using formic acid as reductant

2016 ◽  
Vol 3 (4) ◽  
pp. 505-509 ◽  
Author(s):  
Shengzong Liang ◽  
Paige Monsen ◽  
Gerald B. Hammond ◽  
Bo Xu
Keyword(s):  
Formic Acid ◽  
Carbonyl Compounds ◽  
Reductive Amination ◽  
Cost Effective ◽  
Aldehydes And Ketones

The combination of commercial easily available Au/TiO2 as catalyst and cost-effective formic acid as reductant was able to render reductive amination of various carbonyl compounds.

Tetranuclear Copper and Mononuclear Nickel Complex of the Schiff Base of (3Z)-3-Hydrazonobutan-2-One Oxime with Different Aromatic Carbonyl Compounds: Synthesis, Single Crystal X-Ray Structure, Catecholase Activity, Phenoxazinone Synthase Activity, Catalytic Study for the Homocoupling of Benzyl Amines

2019 ◽  
Author(s):  
Swaraj Sengupta ◽  
Sahanwaj Khan ◽  
Shyamal K. Chattopadhyay ◽  
Indrani Banerjee ◽  
Tarun K. Panda ◽  
...  
Keyword(s):  
Schiff Base ◽  
Single Crystal ◽  
Copper Complex ◽  
Carbonyl Compounds ◽  
Nickel Complex ◽  
Schiff Base Ligands ◽  
X Ray ◽  
Phenoxazinone Synthase ◽  
Catecholase Activity ◽  
Aromatic Carbonyl Compounds

Synthesis and characterisation of one trinuclear copper complex, ([Cu<sub>3</sub>L<sub>3</sub>O]ClO<sub>4</sub>) (<b>1</b>) and one nickel complex ([Ni(L'H)<sub>2</sub>(dmso)<sub>2</sub>](ClO<sub>4</sub>)<sub>2</sub>) (<b>2</b>) with Schiff base ligands: (3Z)-3-((Z)-(1-(thiophen-2-yl)ethylidene)hydrazono)butan-2-one oxime (LH) and 1-(pyridin-2-yl)ethylidene)hydrazono)butan-2-one oxime (L<sup>'</sup>H). <b>1</b> shows high catecholase activity and has also been tested as a catalyst for the synthesis of benzylimine. <b>2 </b> shows phenoxazinone synthase activity.

scholarly journals Copper(I) Chloride/Kieselguhr: A Versatile Catalyst for Oxidation of Alkyl Halides and Alkyl Tosylates to the Carbonyl Compounds

1999 ◽  
Vol 23 (7) ◽  
pp. 434-435
Author(s):  
Mohammed M. Hashemi ◽  
Yousef Ahmadi Beni
Keyword(s):  
Carbonyl Compounds ◽  
Alkyl Halides ◽  
Aldehydes And Ketones ◽  
High Yields

Copper(I) Chloride adsorbed on Kieselguhr in the presence of oxygen catalyses oxidation of alkyl halides and alkyl tosylates to the aldehydes and ketones in high yields.

Activation of TMSCN by N-Heterocyclic Carbenes for Facile Cyanosilylation of Carbonyl Compounds.

ChemInform ◽  
2006 ◽  
Vol 37 (25) ◽  
Author(s):  
Jinhua J. Song ◽  
Fabrice Gallou ◽  
Jonathan T. Reeves ◽  
Zhulin Tan ◽  
Nathan K. Yee ◽  
...  
Keyword(s):  
Carbonyl Compounds ◽  
Heterocyclic Carbenes

scholarly journals Michael addition of carbonyl compounds to nitroolefins under the catalysis of new pyrrolidine-based bifunctional organocatalysts

2018 ◽  
Vol 16 (6) ◽  
pp. 924-935 ◽  
Author(s):  
A. Castán ◽  
R. Badorrey ◽  
J. A. Gálvez ◽  
P. López-Ram-de-Víu ◽  
M. D. Díaz-de-Villegas
Keyword(s):  
Michael Addition ◽  
Carbonyl Compounds ◽  
Asymmetric Michael Addition ◽  
Aldehydes And Ketones

Novel bifunctional pyrrolidine-based organocatalysts applicable for the asymmetric Michael addition of aldehydes and ketones to nitroolefins have been developed.

Sterically demanding bi- and tridentate alkoxy-N-heterocyclic carbenes

2007 ◽  
Vol 360 (1) ◽  
pp. 190-196 ◽  
Author(s):  
Polly L. Arnold ◽  
Claire Wilson
Keyword(s):  
Heterocyclic Carbenes ◽  
Sterically Demanding

Thermolysis of Δ3-1,3,4-oxadiazolin-2-ones and 2-phenylimino-Δ3-1,3,4-oxadazolines derived from α,β-epoxyketones. An alternative method for the convers of α,β-epoxyketones to alkynones and alkynals

1978 ◽  
Vol 56 (3) ◽  
pp. 308-315 ◽  
Author(s):  
Gerald A. MacAlpine ◽  
John Warkentin
Keyword(s):  
Carbonyl Compounds ◽  
Polar Solvents ◽  
Parallel Decomposition ◽  
Alternative Method ◽  
Aldehydes And Ketones ◽  
Decomposition Pathway

Thermolyses in polar solvents, of Δ3-1,3,4-oxadiazolin-2-ones or 2-phenylimino-Δ3-1,3,4-oxadiazolines derived from α,β-epoxyketones, yields acetylenic carbonyl compounds. Good yields of acetylenic aldehydes and ketones are obtained for those cases in which the epoxide is ring fused. Extension to acyclic cases failed primarily due to predominance of a parallel decomposition pathway. The method complements the procedures developed by Eschenmoser and co-workers for the conversion of, α,β-epoxyketones into acetylenic carbonyl compounds.

scholarly journals Synthesis of the O-(2,3,4,5,6-Pentafluorobenzyl)Hydroxylamine Oximes of Selected Carbonyl Compounds and Their Determination by Liquid Chromatography with Ultraviolet Detection

2000 ◽  
Vol 83 (4) ◽  
pp. 859-870 ◽  
Author(s):  
Karina Wiesenthal ◽  
Alexander Jehlar ◽  
Shane S Que Hee
Keyword(s):  
Carbonyl Compounds ◽  
Tap Water ◽  
Hydroxylamine Hydrochloride ◽  
Gradient Elution ◽  
Electron Capture Detection ◽  
Resonance Spectroscopy ◽  
Ultraviolet Detection ◽  
13C Nuclear Magnetic Resonance ◽  
Aldehydes And Ketones ◽  
Synthetic Reaction

Abstract The aims were to develop a liquid chromatographic (LC) method with ultraviolet detection (UVD) for O-(2,3,4,5,6-pentafluorobenzyl)hydroxylamine hydrochloride (PFBHA) O-oximes of common aldehydes and ketones, and to define the steric limits of the synthetic reaction used to make the PFBHA O-oxime standards for gas chromatographic (GC) and LC methods. Ten new O-oximes were synthesized with the new optimized method, and their purities were demonstrated by GC/electron-capture detection (ECD), GC/mass spectrometry (MS), ultraviolet spectroscopy, infrared spectroscopy, and proton and 13C-nuclear magnetic resonance spectroscopy. Ketones substituted at both β-carbons relative to the carbonyl carbon, like diisobutyl ketone and 2,4-hexanedione, showed lower synthetic yields by wet chemistry methods. A new C18 reverse-phase LC method with UVD at 200 nm and acetonitrile–water in both the isocratic and gradient-elution modes was then developed to sensitively resolve a mixture of 13 pure PFBHA O-oximes. The detection limit was near 100 ng O-oxime/mL or about 14–50 ng aldehyde/mL and the least quantifiable limits were near 500 ng/mL or about 70–250 ng aldehyde/mL, with lower limits for glyoxal, methylglyoxal, benzaldehyde, and acetophenone. Carbonyl compounds in 500 mL water samples were then determined in distilled water and tap water by gradient elution. Vapors of n-valeraldehyde and acrolein generated in gas bags at concentrations near occupational guidelines were also sampled, desorbed, and then determined by either isocratic or gradient elution at 200 or 254 nm within 30–45 min.

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