Ruthenium nanoparticles supported over mesoporous TiO2 as an efficient bifunctional nanocatalyst for esterification of biomass-derived levulinic acid and transfer-hydrogenation reactions

RSC Advances ◽  
2016 ◽  
Vol 6 (77) ◽  
pp. 73440-73449 ◽  
Author(s):  
Usha Mandi ◽  
Noor Salam ◽  
Sudipta K. Kundu ◽  
Asim Bhaumik ◽  
Sk. Manirul Islam
Keyword(s):  
Catalytic Activity ◽  
Levulinic Acid ◽  
Mesoporous Tio2 ◽  
Transfer Hydrogenation ◽  
Selective Transfer ◽  
Ruthenium Nanoparticles ◽  
Hydrogenation Reactions

Ru NPs supported over mesoporous TiO2 nanocatalyst and its catalytic activity was evaluated in the esterification of levulinic acid and selective transfer hydrogenation of nitroarenes.

scholarly journals Immobilization of an Iridium(I)-NHC-Phosphine Catalyst for Hydrogenation Reactions under Batch and Flow Conditions

Catalysts ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 656
Author(s):  
Henrietta Kovács ◽  
Krisztina Orosz ◽  
Gábor Papp ◽  
Ferenc Joó ◽  
Henrietta Horváth
Keyword(s):  
Catalytic Activity ◽  
Ion Exchange ◽  
Heterogeneous Catalyst ◽  
Aqueous Phase ◽  
Levulinic Acid ◽  
Flow Reactor ◽  
High Catalytic Activity ◽  
Flow Conditions ◽  
Hydrogenation Reactions ◽  
Excellent Selectivity

Na2[Ir(cod)(emim)(mtppts)] (1) with high catalytic activity in various organic- and aqueous-phase hydrogenation reactions was immobilized on several types of commercially available ion-exchange supports. The resulting heterogeneous catalyst was investigated in batch reactions and in an H-Cube flow reactor in the hydrogenation of phenylacetylene, diphenylacetylene, 1-hexyne, and benzylideneacetone. Under proper conditions, the catalyst was highly selective in the hydrogenation of alkynes to alkenes, and demonstrated excellent selectivity in C=C over C=O hydrogenation; furthermore, it displayed remarkable stability. Activity of 1 in hydrogenation of levulinic acid to γ-valerolactone was also assessed.

scholarly journals [(1,2,5,6-η)-Cycloocta-1,5-diene](1-ethyl-3-isopropyl-1,3-imidazol-2-ylidene-κC2)(triphenylphosphane-κP)iridium(I) tetrafluoridoborate

IUCrData ◽  
2017 ◽  
Vol 2 (10) ◽  
Author(s):  
Karam B. Idrees ◽  
William J. Rutledge ◽  
Sue A. Roberts ◽  
Edward Rajaseelan
Keyword(s):  
Catalytic Activity ◽  
Title Compound ◽  
Complex Cation ◽  
Transfer Hydrogenation ◽  
Planar Geometry ◽  
Iridium Complex ◽  
Asymmetric Unit ◽  
Cationic Complex ◽  
Square Planar ◽  
Hydrogenation Reactions

In the title compound, [Ir(C8H12)(C8H14N2)(C18H15P)]BF4, the cationic complex has the anticipated square-planar geometry. The asymmetric unit comprises the iridium complex and one tetrafluoridoborate anion. The space group is non-centrosymmetric, with the Flack parameter of 0.007 (3) well determined, and confirms the hand for the complex cation. This compound shows promising catalytic activity in transfer hydrogenation reactions.

ChemInform Abstract: Catalytic Activity of Ru/Tetrahydropyrimidinium Salts System for Transfer Hydrogenation Reactions.

ChemInform ◽  
2015 ◽  
Vol 46 (43) ◽  
pp. no-no
Author(s):  
Emine Oezge Karaca ◽  
Nevin Guerbuez ◽  
Hakan Arslan ◽  
Don VanDerveer ◽  
Ismail Oezdemir
Keyword(s):  
Catalytic Activity ◽  
Transfer Hydrogenation ◽  
Hydrogenation Reactions

scholarly journals Transfer Hydrogenation Reactions of Photoactivatable N,N’-Chelated Ruthenium(II) Arene Complexes

2017 ◽  
Vol 57 (3) ◽  
Author(s):  
Soledad Betanzos-Lara ◽  
Abraha Habtemariam ◽  
Peter J. Sadler
Keyword(s):  
Aqueous Solution ◽  
Catalytic Activity ◽  
Sodium Formate ◽  
Transfer Hydrogenation ◽  
Arene Complexes ◽  
Chelating Ligand ◽  
Spontaneous Hydrolysis ◽  
Hydrogenation Reactions ◽  
Excess Sodium ◽  
Hydrolysis Of

We show that the reaction of Ru<sup>II</sup> arene chlorido complexes of the type [(η<sup>6</sup>-arene)Ru(N,N’)Cl]<sup>+</sup> arene = p-cymene (pcym), hexamethylbenzene (hmb), indane (ind), <em>N,N’</em> = bipyrimidine (bpm) and 1,10-phenanthroline (phen) with excess sodium formate generates a very stable formate adduct through spontaneous hydrolysis of the Ru-Cl bond at 310 K and pH* = 7.0. The formate adducts are also produced when Ru<sup>II</sup> arene pyridine complexes of the type [(η<sup>6</sup>-arene)Ru(N,N’)(Py)]<sup>2+</sup> (where Py = pyridine), are irradiated with UVA (λ<sub>irr</sub> = 300-400 nm) or visible light (λ<sub>irr</sub> = 400-660 nm) under the same conditions. The Ru<sup>II</sup> arene formato adducts do not catalyse the reduction of acetone through transfer hydrogenation. However, all the complexes (except complex <strong>2</strong> which contains phen as the chelating ligand) can catalyse the regioselective reduction of NAD<sup>+</sup> in the presence of formate (25 mol equiv) in aqueous solution to form 1,4-NADH. The catalytic activity is dependent on the nature of the chelating ligand. Most interestingly, the regioselective reduction of NAD+ to 1,4-NADH can be also specifically triggered by photoactivating a RuII arene Py complex.

Ruthenium(ii) complexes of hemilabile pincer ligands: synthesis and catalysing the transfer hydrogenation of ketones

2016 ◽  
Vol 45 (36) ◽  
pp. 14335-14342 ◽  
Author(s):  
Ashwin G. Nair ◽  
Roy T. McBurney ◽  
D. Barney Walker ◽  
Michael J. Page ◽  
Mark R. D. Gatus ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Transfer Hydrogenation ◽  
Pincer Ligands ◽  
Hydrogenation Reactions

A series of hemilabile NHC Ru(ii) complexes were synthesised and assessed for their catalytic activity for transfer hydrogenation reactions.

scholarly journals The Transfer Hydrogenation Reactions Catalyzed by Rhodium Schiff Base Complexes

2010 ◽  
Vol 2 (3) ◽  
pp. 501
Author(s):  
T. Al-Salim ◽  
J. S. Hadi ◽  
E. A. Al-Nasir ◽  
M. A. Hassen
Keyword(s):  
Schiff Base ◽  
Catalytic Activity ◽  
Formic Acid ◽  
Elemental Analysis ◽  
Mass Spectra ◽  
Transfer Hydrogenation ◽  
Schiff Base Complexes ◽  
Time Range ◽  
Reaction Conditions ◽  
Hydrogenation Reactions

Three new Schiff base rhodium (III) complexes, derived from three ligands, L1, L2 and L3 have been prepared and characterized by IR, 1HNMR, mass spectra and the elemental analysis. These complexes have shown efficient catalytic activity in the transfer hydrogenation of wide variety ketones to the corresponding alcohols in formic acid/triethylamine solution under mild reaction conditions. Depending on the ketone, the percentage of conversion for RhL1 have been found to be (51-92%) compared to RhL2 which had a yield of (42-92%) while for RhL3 (71-94%), within time range of   0.5-12 hrs.  Keywords: Schiff base; Rhodium (III) complex; Transfer hydrogenation; Diamine.                      © 2010 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved. DOI: 10.3329/jsr.v2i3.4341                J. Sci. Res. 2 (3), 501-511 (2010) 

Catalytic transfer hydrogenation of biomass-derived levulinic acid to γ-valerolactone over Sn/Al-SBA-15 catalysts

2020 ◽  
Vol 44 (20) ◽  
pp. 8209-8222 ◽  
Author(s):  
Sakthivel Kumaravel ◽  
Sivakumar Thiripuranthagan ◽  
Mani Durai ◽  
Elangovan Erusappan ◽  
Thanigaivel Vembuli
Keyword(s):  
Catalytic Activity ◽  
Levulinic Acid ◽  
Transfer Hydrogenation ◽  
Catalytic Transfer Hydrogenation ◽  
Hydrogenation Activity ◽  
Catalytic Transfer

The synthesized inexpensive catalysts show high catalytic transfer hydrogenation activity at ambient N2 pressure under non-corrosive conditions. The Sn/Al-SBA-15 (25) catalyst exhibited the highest catalytic activity with 99% conversion of levulinic acid and 100% selectivity towards GVL.

Ruthenium(II)–carbonyl complexes containing two N-monodentate 1,8-naphthyridine ligands: active catalysis in transfer hydrogenation reactions

2018 ◽  
Vol 74 (11) ◽  
pp. 1547-1552
Author(s):  
Juana Guajardo ◽  
Andrés Ibañez ◽  
Veronique Guerchais ◽  
Andrés Vega ◽  
Sergio Moya ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Good Yield ◽  
Hydrogen Transfer ◽  
Transfer Reaction ◽  
Transfer Hydrogenation ◽  
Distorted Octahedron ◽  
High Yield ◽  
Carbonyl Complexes ◽  
Hydrogen Transfer Reaction ◽  
Hydrogenation Reactions

The reaction of 2-aminonicotinaldehyde with 2- or 4-methoxyacetophenone in basic media leads to the new ligands 2-(4-methoxyphenyl)-1,8-naphthyridine and 2-(2-methoxyphenyl)-1,8-naphthyridine, respectively, in high yield. The reaction of these naphthyridine derivatives with [RuCl2(CO)2] n leads to the respective complexes cis-dicarbonyldichloridobis[2-(4-methoxyphenyl)-1,8-naphthyridine-κN 8]ruthenium(II) and cis-dicarbonyldichloridobis[2-(2-methoxyphenyl)-1,8-naphthyridine-κN 8]ruthenium(II), both [RuCl2(C15H12N2O)2(CO)2], in good yield. Both ruthenium(II) complexes display a slightly distorted octahedron with two cis carbonyl, two cis chloride and two cis naphthyridine ligands, the latter coordinated in a monodentate fashion through the N atom in the 8-position. Both complexes exhibit a moderate catalytic activity in the hydrogen-transfer reaction from propan-2-ol to acetophenone in the presence of a base, with 100% selectivity.

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