Catalyst for transfer hydrogenationCatalytic transferEstersReactionsEffective CatalystsComplexesAsymmetric transferSynthesisIminesIsopropanolNitrobenzeneAldehydesAromaticLigandsHydrogen atomsCarbeneSubstratesReductionMolecularCarbonSustainableNickelMass transferProton transferChemicalApplicationAdditionTraditionalCONVERSIONResultsHighlyStudyFormation
Catalyst for transfer hydrogenation1
- Cp*Ir(2,2′-bpyO)(H 2 O)] is a highly efficient and general catalyst for transfer hydrogenation of carbonyl compounds and chemoselective transfer hydrogenation of unsaturated aldehydes with isopropanol under neutral conditions. (organic-chemistry.org)
Catalytic transfer2
- In this work, hierarchical hafnium-containing multifunctional Linde type L (LTL) related zeotypes were prepared via top-down strategies, for the chemical valorization of LA, AnL and HMF via integrated catalytic transfer hydrogenation (CTH) and acid reactions in alcohol medium. (ua.pt)
- 64] "A crystalline aluminium-carbon-based ambiphile capable of activation and catalytic transfer of ammonia in non-aqueous media" Felix Krämer, Jan Paradies, Israel Fernández, Frank Breher*, Nature Chemistry, DOI:10.1038/s41557-023-01340-9. (uni-paderborn.de)
Esters1
- A pH-independent asymmetric transfer hydrogenation of β-keto esters in water with formic acid/sodium formate can be conducted open to air and gives access to β-hydroxy esters in excellent yields and selectivities. (organic-chemistry.org)
Reactions4
- More exotic transfer hydrogenations have been reported, including this intramolecular one: Many reactions exist with alcohol or amines as the proton donors, and alkali metals as electron donors. (wikipedia.org)
- In the majority of cases, catalytic hydrogenations are mass transfer limited reactions. (buss-ct.com)
- In addition, NH 3 transfer reactions mediated by a main-group catalyst are presented. (uni-paderborn.de)
- Typically, under continuous flow, reactions are faster due to improved mixing and there is better heat transfer as a result of the smaller-scale architectures offering higher surface area to volume when compared with traditional batch vessels. (almacgroup.com)
Effective Catalysts1
- The ruthenium compounds also act as effective catalysts in the transfer hydrogenation of the -C=O- → -CH(OH)- system. (ntnu.edu.tw)
Complexes3
- In the area of organic synthesis, a useful family of hydrogen-transfer catalysts have been developed based on ruthenium and rhodium complexes, often with diamine and phosphine ligands. (wikipedia.org)
- 17. Coordinatively diverse ortho-phosphinoaniline complexes of ruthenium and isolation of a putative intermediate in ketone transfer hydrogenation catalysis. (nih.gov)
- Incorporation of biotinylated racemic three-legged d6-piano stool complexes in streptavidin yields enantioselective transfer hydrogenation artificial metalloenzymes for the reduction of ketones. (ward-lab.ch)
Asymmetric transfer2
- These new compounds were synthesized and evaluated in the asymmetric transfer hydrogenation of 2-phenylquinoline. (beilstein-journals.org)
- Enantioselective Synthesis of Homoisoflavanones by Asymmetric Transfer Hydrogenation and Their Biological Evaluation for Antiangiogenic Activity. (bvsalud.org)
Synthesis4
- Transfer hydrogenation usually occurs at mild temperature and pressure conditions using organic or organometallic catalysts, many of which are chiral, allowing efficient asymmetric synthesis. (wikipedia.org)
- The combination of magnesium and methanol is used in alkene reductions, e.g. the synthesis of asenapine: Organocatalytic transfer hydrogenation has been described by the group of List in 2004 in a system with a Hantzsch ester as hydride donor and an amine catalyst: In this particular reaction the substrate is an α,β-unsaturated carbonyl compound. (wikipedia.org)
- The hydrogenation of alkynes allows the synthesis of olefins, which are important feedstock for the materials, pharmaceutical, and petrochemical industry. (nature.com)
- Here, we report on the chromium-catalyzed E - and Z -selective olefin synthesis via hydrogenation of alkynes, controlled by two carbene ligands. (nature.com)
Imines1
- Extending the scope of this reaction towards ketones or rather enones requires fine tuning of the catalyst (add a benzyl group and replace the t-butyl group by a furan) and of the Hantzsch ester (add more bulky t-butyl groups): With another organocatalyst altogether, hydrogenation can also be accomplished for imines. (wikipedia.org)
Isopropanol1
- The hydrogen-donor (transfer agent) is typically isopropanol, which converts to acetone upon donation of hydrogen. (wikipedia.org)
Nitrobenzene1
- Aniline is synthesized by catalytic hydrogenation of nitrobenzene or by ammonolysis of phenol. (cdc.gov)
Aldehydes1
- Schüth, F. Co 3 O 4 Nanoparticles Supported on Mesoporous Carbon for Selective Transfer Hydrogenation of α,β-Unsaturated Aldehydes. (mpg.de)
Aromatic1
- Traditional metal-based catalysts, hydrogenation of aromatic or heteroaromatic substrates tend to fail. (wikipedia.org)
Ligands2
- b Controlling the E - and Z -selectivity in the hydrogenation of alkynes by two CAAC ligands. (nature.com)
- In this work, we describe progress made in addressing the key stereochemical challenges in using two ligands in control of the selectivity in E - and Z -olefin formation by the hydrogenation of alkynes with molecular hydrogen (Fig. 1b ). (nature.com)
Hydrogen atoms2
- We explore the optimum pathway for the hydrogenation reaction and find the activation energy associated with sigmatropic rearrangement of chemisorbed hydrogen atoms to lie near 1 eV, thus facilitating formation of energetically favorable adsorbate structures by surface diffusion. (aps.org)
- Physiologic Function C C157225 CBDD Terminology C157199 Hydrogenation Hydrogenation The addition of two hydrogen atoms to another molecular entity through the reaction of molecular hydrogen (H2) with that entity. (nih.gov)
Carbene1
- A cyclic (alkyl)(amino)carbene ligand that contains a phosphino anchor enables the hydrogenation of alkynes in a trans -addition manner, selectively forming E -olefins. (nature.com)
Substrates1
- Prior to the development of catalytic hydrogenation, many methods were developed for the hydrogenation of unsaturated substrates. (wikipedia.org)
Reduction2
- Incorporation of a biotinylated organometallic catalyst into a host protein (avidin or streptavidin) affords versatile artificial metalloenzymes for the reduction of ketones by transfer hydrogenation. (ward-lab.ch)
- hydrogen reduction of tungstic acid or its anhydride, or by the hydrogenation of tungsten trioxide or ammonium paratungstate. (nih.gov)
Molecular2
- In chemistry, transfer hydrogenation is a chemical reaction involving the addition of hydrogen to a compound from a source other than molecular H2. (wikipedia.org)
- It avoids the need for high-pressure molecular H2 used in conventional hydrogenation. (wikipedia.org)
Carbon1
- Synthetic Liquid Fuels From Hydrogenation of Carbon Monoxide. (fischer-tropsch.org)
Sustainable2
- This study may lead to the development of a sustainable CO2 hydrogenation path and help in the development of technologies to reduce greenhouse gas emissions. (know-todays-news.com)
- This indicates that generating hydrogen from water separately and then reacting the produced green hydrogen with CO 2 using a plasmonic photocatalyst is a more sustainable CO 2 hydrogenation path. (know-todays-news.com)
Nickel5
- The research titled, "Nickel-Laden Dendritic Plasmonic Colloidosomes of Black Gold: Forced Plasmon Mediated Photocatalytic CO2 Hydrogenation," published in the journal ACS Nano, presents a new approach to turn CO2 into a fuel source at room temperature using a plasmonic catalyst. (know-todays-news.com)
- The researchers designed dendritic plasmonic colloidosomes of black gold loaded with nickel sites to catalyze the CO2 hydrogenation reaction mechanism using finite-difference time-domain simulations, light-intensity-dependent production rate, light-intensity-dependent photocatalytic quantum efficiencies, wavelength-dependent production rate, kinetic isotope effect, ultrafast transient absorption spectroscopy, and in situ diffuse reflectance infrared Fourier transform spectroscopy. (know-todays-news.com)
- Plasmonic black gold-nickel efficiently catalyzes CO2 hydrogenation using visible light. (know-todays-news.com)
- The catalyst exhibited a spectral signature of such an indirect charge generation due to hot-electron transfer from the gold to the nickel. (know-todays-news.com)
- CO2 hydrogenation took place by a direct dissociation path via linearly bonded nickel-CO, and the linearly bonded CO on Ni sites of DPC-C4-Ni were weakly bonded due to its weak Ni-C bond. (know-todays-news.com)
Mass transfer3
- With this feature we actively maximise the surface area between the gaseous and liquid phase, which is the main parameter of each mass transfer limited reaction, independently from the size of a reactor. (buss-ct.com)
- The sonication improves the mass transfer and increases thereby efficiency, conversion rate and yield. (hielscher.com)
- Furthermore, the characteristics of pre-formed catalysts can be influenced by removing passivating surface layers, better dispersion, increasing mass transfer. (hielscher.com)
Proton transfer2
- In the catalytic cycle for this reaction the amine and the aldehyde first form an iminium ion, then proton transfer is followed by hydrolysis of the iminium bond regenerating the catalyst. (wikipedia.org)
- We are particularly interested in understanding how the geometry of a molecule changes: one example is isomerization or proton transfer that is driven by vibrational excitation. (lu.se)
Chemical2
- 62] "Structure-reactivity relationships in borane-based FLP-catalyzed hydrogenations, dehydrogenations, and cycloisomerizations" Jan Paradies Account of Chemical Research 2023, DOI:10.1021/acs.accounts.2c00832. (uni-paderborn.de)
- Chemical Viewed Structurally C C157225 CBDD Terminology C142787 Viral Transduction Transduction The transfer of genetic material from one microorganism to another by a viral agent. (nih.gov)
Application1
- A large scale application of transfer hydrogenation is coal liquefaction using "donor solvents" such as tetralin. (wikipedia.org)
Addition1
- In addition, a large proportion of the available selenium is used to coat the metal cylinders from which a photographic image is transferred in xerography (Fishbein 1983). (cdc.gov)
Traditional1
- Especially, nitro, benzyl, boc, and sulfur containing alkynes can be reduced to the corresponding alkanes directly, which provides a useful complementary method to traditional catalytic hydrogenation. (nih.gov)
CONVERSION1
- Compound 4 influences a concentration-dependent apoptosis in PC-3 cells and initiates the conversion rate in transfer hydrogenation. (ntnu.edu.tw)
Results1
- Our results indicate that transfer of atomic hydrogen from the amine end-group of chemisorbed DETA molecules to nanocarbons is an exothermic reaction. (aps.org)
Highly1
- Fig. 1: Controlling the stereochemistry in alkyne hydrogenation for highly selective formation of E - and Z -olefins. (nature.com)
Study2
- We apply {\em ab initio} density functional calculations to study the hydrogenation of graphitic nanocarbons including fullerenes, onions and nanotubes using diethylenetriamine (DETA) as hydrogenation reagent. (aps.org)
- To further confirm the role of hot electrons, experiments were carried out to study the kinetic isotope effect of photocatalytic CO 2 hydrogenation using 13 CO 2 and 12 CO 2 in light and dark. (know-todays-news.com)
Formation1
- (C) The hydrogenation of NDs either at ΔTs or in a hydrogen plasma leads to the formation of C-H bonds on the surface and hydrophobic properties. (medscape.com)