Microwave-Assisted Heterogeneous Transfer Hydrogenation of Ketones

2007 ◽  
Vol 124-126 ◽  
pp. 1785-1788 ◽  
Author(s):  
M.S. Sarkar ◽  
Myung Jong Jin
Keyword(s):  
Silica Gel ◽  
Hydrogen Transfer ◽  
Transfer Reaction ◽  
Transfer Hydrogenation ◽  
Efficient Catalyst ◽  
Efficient Procedure ◽  
Microwave Assisted ◽  
Hydrogen Transfer Reaction ◽  
Ru Complex

A first and efficient procedure has been developed for microwave-assisted transfer hydrogenation of ketones. Silica gel-supported ligand 2 has been prepared for the transfer hydrogenation. This immobilized ligand-Ru complex acted as an efficient catalyst for the hydrogen transfer reaction of ketones. The MW-assisted reactions using the supported ligand 2 could reach completion within 20~40 min.

Transfer Hydrogenation of Imines with Ammonia-Borane: A Concerted Double-Hydrogen-Transfer Reaction

2010 ◽  
Vol 49 (11) ◽  
pp. 2058-2062 ◽  
Author(s):  
Xianghua Yang ◽  
Lili Zhao ◽  
Thomas Fox ◽  
Zhi-Xiang Wang ◽  
Heinz Berke
Keyword(s):  
Hydrogen Transfer ◽  
Transfer Reaction ◽  
Ammonia Borane ◽  
Transfer Hydrogenation ◽  
Hydrogen Transfer Reaction ◽  
Double Hydrogen

scholarly journals Synthesis and structures of ruthenium–NHC complexes and their catalysis in hydrogen transfer reaction

2015 ◽  
Vol 11 ◽  
pp. 1786-1795 ◽  
Author(s):  
Chao Chen ◽  
Chunxin Lu ◽  
Qing Zheng ◽  
Shengliang Ni ◽  
Min Zhang ◽  
...  
Keyword(s):  
Hydrogen Transfer ◽  
Transfer Reaction ◽  
Ruthenium Complexes ◽  
Octahedral Geometry ◽  
Molecular Structures ◽  
Transfer Hydrogenation ◽  
Acetonitrile Solution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Hydrogen Transfer Reaction

Ruthenium complexes [Ru(L1)2(CH3CN)2](PF6)2 (1), [RuL1(CH3CN)4](PF6)2 (2) and [RuL2(CH3CN)3](PF6)2 (3) (L1= 3-methyl-1-(pyrimidine-2-yl)imidazolylidene, L2 = 1,3-bis(pyridin-2-ylmethyl)benzimidazolylidene) were obtained through a transmetallation reaction of the corresponding nickel–NHC complexes with [Ru(p-cymene)2Cl2]2 in refluxing acetonitrile solution. The crystal structures of three complexes determined by X-ray analyses show that the central Ru(II) atoms are coordinated by pyrimidine- or pyridine-functionalized N-heterocyclic carbene and acetonitrile ligands displaying the typical octahedral geometry. The reaction of [RuL1(CH3CN)4](PF6)2 with triphenylphosphine and 1,10-phenanthroline resulted in the substitution of one and two coordinated acetonitrile ligands and afforded [RuL1(PPh3)(CH3CN)3](PF6)2 (4) and [RuL1(phen)(CH3CN)2](PF6)2 (5), respectively. The molecular structures of the complexes 4 and 5 were also studied by X-ray diffraction analysis. These ruthenium complexes have proven to be efficient catalysts for transfer hydrogenation of various ketones.

scholarly journals Ultra-Small FeS2 Nanoparticles for Highly Efficient Chemoselective Transfer Hydrogenation of Nitroarenes

2021 ◽  
Author(s):  
Jamie Paul Southouse ◽  
Laura Lazzarini ◽  
A O Ibhadon ◽  
Maria Grazia Francesconi
Keyword(s):  
Hydrogen Transfer ◽  
Transfer Reaction ◽  
Catalytic Performance ◽  
Transfer Hydrogenation ◽  
Substituted Anilines ◽  
Hydrogen Transfer Reaction ◽  
Highly Efficient ◽  
Current Systems

Ultra-small FeS2 nanoparticles were prepared and used as catalysts in a hydrogen transfer reaction for the synthesis of substituted anilines. The catalytic performance is superior to current systems across all...

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.

scholarly journals Mesoporous Silica-Supported Sulfonyldiamine Ligand for Microwave-Assisted Transfer Hydrogenation

2015 ◽  
Vol 2015 ◽  
pp. 1-6
Author(s):  
Shaheen M. Sarkar ◽  
Md. Eaqub Ali ◽  
Md. Shaharul Islam ◽  
Md. Lutfor Rahman ◽  
S. S. Rashid ◽  
...  
Keyword(s):  
Microwave Heating ◽  
Significant Loss ◽  
Transfer Hydrogenation ◽  
High Catalytic Activity ◽  
Efficient Catalyst ◽  
Microwave Assisted ◽  
Ru Complex ◽  
Simple Filtration ◽  
Diamine Ligands

N-Sulfonyl-1,2-diamine ligands, derived from 1,2-diaminocyclohexane and 1,2-diaminopropane, were immobilized onto mesoporous SBA-15 silica. The SBA-15-supported sulfonyldiamine-Ru complex was preparedin situunder microwave heating at 60 W for 3 min. The prepared sulfonyldiamine-Ru complex was used as an efficient catalyst for the transfer hydrogenation of ketones to the corresponding secondary alcohols. The heterogeneous complex showed extremely high catalytic activity with 99% conversion rate under microwave heating condition. The complexes were regenerated by simple filtration and reused two times without significant loss of activity.

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