Ruthenium(ii) carbonyl complexes bearing CCC-pincer bis-(carbene) ligands: synthesis, structures and activities toward recycle transfer hydrogenation reactions

2013 ◽  
Vol 42 (36) ◽  
pp. 13161 ◽  
Author(s):  
Abbas Raja Naziruddin ◽  
Zhao-Jiunn Huang ◽  
Wei-Chih Lai ◽  
Wan-Jung Lin ◽  
Wen-Shu Hwang
Keyword(s):  
Transfer Hydrogenation ◽  
Carbonyl Complexes ◽  
Carbene Ligands ◽  
Hydrogenation Reactions

scholarly journals Ru(ii)–N-heterocyclic carbene complexes: synthesis, characterization, transfer hydrogenation reactions and biological determination

RSC Advances ◽  
2019 ◽  
Vol 9 (59) ◽  
pp. 34406-34420 ◽  
Author(s):  
Lamia Boubakri ◽  
A. Chakchouk-Mtibaa ◽  
Abdullah S. Al-Ayed ◽  
L. Mansour ◽  
Nael Abutaha ◽  
...  
Keyword(s):  
Transfer Hydrogenation ◽  
Carbene Ligands ◽  
Carbene Complexes ◽  
Hydrogenation Reactions ◽  
Biological Determination

A series of ruthenium(ii) complexes with N-heterocyclic carbene ligands were successfully synthesized by transmetalation reactions between silver(i) N-heterocyclic carbene complexes and [RuCl2(p-cymene)]2 in dichloromethane under Ar conditions.

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.

Catch It If You Can: Copper-Catalyzed (Transfer) Hydrogenation Reactions and Coupling Reactions by Intercepting Reactive Intermediates Thereof

Synthesis ◽  
2020 ◽  
Vol 52 (17) ◽  
pp. 2483-2496
Author(s):  
Johannes F. Teichert ◽  
Lea T. Brechmann
Keyword(s):  
Coupling Reaction ◽  
Reactive Intermediates ◽  
Transfer Hydrogenation ◽  
Coupling Reactions ◽  
Bond Forming ◽  
Starting Point ◽  
Bond Forming Reactions ◽  
Hydrogenation Reactions ◽  
Multicomponent Coupling Reactions ◽  
Trapping Reactions

The key reactive intermediate of copper(I)-catalyzed alkyne semihydrogenations is a vinylcopper(I) complex. This intermediate can be exploited as a starting point for a variety of trapping reactions. In this manner, an alkyne semihydrogenation can be turned into a dihydrogen­-mediated coupling reaction. Therefore, the development of copper-catalyzed (transfer) hydrogenation reactions is closely intertwined with the corresponding reductive trapping reactions. This short review highlights and conceptualizes the results in this area so far, with H2-mediated carbon–carbon and carbon–heteroatom bond-forming reactions emerging under both a transfer hydrogenation setting as well as with the direct use of H2. In all cases, highly selective catalysts are required that give rise to atom-economic multicomponent coupling reactions with rapidly rising molecular complexity. The coupling reactions are put into perspective by presenting the corresponding (transfer) hydrogenation processes first.1 Introduction: H2-Mediated C–C Bond-Forming Reactions2 Accessing Copper(I) Hydride Complexes as Key Reagents for Coupling Reactions; Requirements for Successful Trapping Reactions 3 Homogeneous Copper-Catalyzed Transfer Hydrogenations4 Trapping of Reactive Intermediates of Alkyne Transfer Semi­hydrogenation Reactions: First Steps Towards Hydrogenative Alkyne Functionalizations 5 Copper(I)-Catalyzed Alkyne Semihydrogenations6 Copper(I)-Catalyzed H2-Mediated Alkyne Functionalizations; Trapping of Reactive Intermediates from Catalytic Hydrogenations6.1 A Detour: Copper(I)-Catalyzed Allylic Reductions, Catalytic Generation of Hydride Nucleophiles from H2 6.2 Trapping with Allylic Electrophiles: A Copper(I)-Catalyzed Hydro­allylation Reaction of Alkynes 6.3 Trapping with Aryl Iodides7 Conclusion

ChemInform Abstract: NiO-Al2O3 Prepared from a Ni-Al Hydrotalcite Precursor as an Efficient Catalyst for Transfer Hydrogenation Reactions.

ChemInform ◽  
2010 ◽  
Vol 31 (33) ◽  
pp. no-no
Author(s):  
T. M. Jyothi ◽  
T. Raja ◽  
M. B. Talawar ◽  
K. Sreekumar ◽  
S. Sugunan ◽  
...  
Keyword(s):  
Transfer Hydrogenation ◽  
Efficient Catalyst ◽  
Hydrogenation Reactions

scholarly journals Enantiomerically Enriched 1,2-P,N-Bidentate Ferrocenyl Ligands for 1,3-Dipolar Cycloaddition and Transfer Hydrogenation Reactions

Molecules ◽  
2018 ◽  
Vol 23 (6) ◽  
pp. 1311 ◽  
Author(s):  
Irina Utepova ◽  
Polina Serebrennikova ◽  
Marina Streltsova ◽  
Alexandra Musikhina ◽  
Tatiana Fedorchenko ◽  
...  
Keyword(s):  
Transfer Hydrogenation ◽  
Dipolar Cycloaddition ◽  
Ferrocenyl Ligands ◽  
Hydrogenation Reactions

Facile assembly of bifunctional, magnetically retrievable mesoporous silica for enantioselective cascade reactions

2019 ◽  
Vol 55 (90) ◽  
pp. 13578-13581 ◽  
Author(s):  
Zhongrui Zhao ◽  
Fengwei Chang ◽  
Tao Wang ◽  
Lijian Wang ◽  
Lingbo Zhao ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Cross Coupling ◽  
Bifunctional Catalyst ◽  
Cascade Reactions ◽  
Transfer Hydrogenation ◽  
Asymmetric Transfer Hydrogenation ◽  
Aromatic Alcohols ◽  
Hydrogenation Reactions ◽  
Successive Reduction

A magnetically recyclable bifunctional catalyst enables synergistic Suzuki cross-coupling/asymmetric transfer hydrogenation and successive reduction/asymmetric transfer hydrogenation reactions for the preparation of chiral aromatic alcohols.

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