scholarly journals Transfer hydrogenation reactions catalyzed by chiral half-sandwich Ruthenium complexes derived from Proline

2016 ◽  
Vol 128 (9) ◽  
pp. 1405-1415 ◽  
Author(s):  
ARUN KUMAR PANDIA KUMAR ◽  
ASHOKA G SAMUELSON
Keyword(s):  
Ruthenium Complexes ◽  
Transfer Hydrogenation ◽  
Hydrogenation Reactions ◽  
Half Sandwich

Efficient transfer hydrogenation reactions with quinazoline-based ruthenium complexes

2015 ◽  
Vol 56 (1) ◽  
pp. 101-104 ◽  
Author(s):  
Semistan Karabuga ◽  
Songul Bars ◽  
Idris Karakaya ◽  
Selcuk Gumus
Keyword(s):  
Ruthenium Complexes ◽  
Transfer Hydrogenation ◽  
Hydrogenation Reactions ◽  
Efficient Transfer

scholarly journals Ruthenium complexes of P-stereogenic phosphines with a heterocyclic substituent

2016 ◽  
Vol 45 (20) ◽  
pp. 8513-8531 ◽  
Author(s):  
Pau Clavero ◽  
Arnald Grabulosa ◽  
Mercè Rocamora ◽  
Guillermo Muller ◽  
Mercè Font-Bardia
Keyword(s):  
Ruthenium Complexes ◽  
Transfer Hydrogenation ◽  
Asymmetric Transfer Hydrogenation ◽  
Hydrogenation Reactions ◽  
Heterocyclic Substituent ◽  
Optically Pure

Optically pure P-stereogenic monophosphorus ligands containing a heterocyclic substituent have been prepared. They have been coordinated to Ru-η6-arene moieties in which the ligands act as mono- or bidentate. The complexes catalyse asymmetric transfer hydrogenation reactions with up to 70% ee.

Half-Sandwich Ruthenium(II) Picolyl-NHC Complexes: Synthesis, Characterization, and Catalytic Activity in Transfer Hydrogenation Reactions

2011 ◽  
Vol 30 (21) ◽  
pp. 5793-5802 ◽  
Author(s):  
Francys E. Fernández ◽  
M. Carmen Puerta ◽  
Pedro Valerga
Keyword(s):  
Catalytic Activity ◽  
Transfer Hydrogenation ◽  
Hydrogenation Reactions ◽  
Half Sandwich

Ruthenium complexes of phosphine–amide based ligands as efficient catalysts for transfer hydrogenation reactions

2021 ◽  
Author(s):  
Samanta Yadav ◽  
Paranthaman Vijayan ◽  
Sunil Yadav ◽  
Rajeev Gupta
Keyword(s):  
Carbonyl Compounds ◽  
Ruthenium Complexes ◽  
Transfer Hydrogenation ◽  
Biologically Relevant ◽  
Amide Ligands ◽  
Hydrogenation Reactions

Ru(ii) complexes of phosphine–amide ligands function as efficient catalysts for the transfer hydrogenation of assorted carbonyl compounds, including a few challenging biologically relevant substrates, using isopropanol as the hydrogen source.

scholarly journals Synthesis and Characterization of Half-Sandwich Ruthenium Complexes Containing Aromatic Sulfonamides Bearing Pyr­id­inyl Rings: Catalysts for Transfer Hydrogenation of Acetophenone Derivatives

2013 ◽  
Vol 2013 (18) ◽  
pp. 3224-3232 ◽  
Author(s):  
Serkan Dayan ◽  
Nilgun Ozpozan Kalaycioglu ◽  
Jean-Claude Daran ◽  
Agnès Labande ◽  
Rinaldo Poli
Keyword(s):  
Ruthenium Complexes ◽  
Transfer Hydrogenation ◽  
Synthesis And Characterization ◽  
Acetophenone Derivatives ◽  
Half Sandwich

Ruthenium Complexes for Catalytic Dehydrogenation of Hydrazine and Transfer Hydrogenation Reactions

2018 ◽  
Vol 13 (11) ◽  
pp. 1424-1431 ◽  
Author(s):  
Mahendra Kumar Awasthi ◽  
Deepika Tyagi ◽  
Soumyadip Patra ◽  
Rohit Kumar Rai ◽  
Shaikh M. Mobin ◽  
...  
Keyword(s):  
Ruthenium Complexes ◽  
Transfer Hydrogenation ◽  
Catalytic Dehydrogenation ◽  
Hydrogenation Reactions

scholarly journals Methylene-Linked Bis-NHC Half-Sandwich Ruthenium Complexes: Binding of Small Molecules and Catalysis toward Ketone Transfer Hydrogenation

2021 ◽  
Vol 40 (6) ◽  
pp. 792-803
Author(s):  
José Manuel Botubol-Ares ◽  
Safa Cordón-Ouahhabi ◽  
Zakaria Moutaoukil ◽  
Isidro G. Collado ◽  
Manuel Jiménez-Tenorio ◽  
...  
Keyword(s):  
Small Molecules ◽  
Ruthenium Complexes ◽  
Transfer Hydrogenation ◽  
Half Sandwich

Recent developments on methanol as liquid organic hydrogen carrier in transfer hydrogenation reactions

2021 ◽  
Vol 433 ◽  
pp. 213728
Author(s):  
Nidhi Garg ◽  
Ankita Sarkar ◽  
Basker Sundararaju
Keyword(s):  
Transfer Hydrogenation ◽  
Recent Developments ◽  
Hydrogenation Reactions ◽  
Hydrogen Carrier

scholarly journals New Bifunctional Bis(azairidacycle) with Axial Chirality via Double Cyclometalation of 2,2′-Bis(aminomethyl)-1,1′-binaphthyl

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 1165
Author(s):  
Yasuhiro Sato ◽  
Yuichi Kawata ◽  
Shungo Yasui ◽  
Yoshihito Kayaki ◽  
Takao Ikariya
Keyword(s):  
Hydrogen Transfer ◽  
Bond Cleavage ◽  
Enantiomeric Excess ◽  
Transfer Hydrogenation ◽  
Catalyst Precursor ◽  
Asymmetric Catalysts ◽  
Axially Chiral ◽  
Diastereomeric Mixture ◽  
Raney Ni ◽  
Half Sandwich

As a candidate for bifunctional asymmetric catalysts containing a half-sandwich C–N chelating Ir(III) framework (azairidacycle), a dinuclear Ir complex with an axially chiral linkage is newly designed. An expedient synthesis of chiral 2,2′-bis(aminomethyl)-1,1′-binaphthyl (1) from 1,1-bi-2-naphthol (BINOL) was accomplished by a three-step process involving nickel-catalyzed cyanation and subsequent reduction with Raney-Ni and KBH4. The reaction of (S)-1 with an equimolar amount of [IrCl2Cp*]2 (Cp* = η5–C5(CH3)5) in the presence of sodium acetate in acetonitrile at 80 °C gave a diastereomeric mixture of new dinuclear dichloridodiiridium complexes (5) through the double C–H bond cleavage, as confirmed by 1H NMR spectroscopy. A loss of the central chirality on the Ir centers of 5 was demonstrated by treatment with KOC(CH3)3 to generate the corresponding 16e amidoiridium complex 6. The following hydrogen transfer from 2-propanol to 6 provided diastereomers of hydrido(amine)iridium retaining the bis(azairidacycle) architecture. The dinuclear chlorido(amine)iridium 5 can serve as a catalyst precursor for the asymmetric transfer hydrogenation of acetophenone with a substrate to a catalyst ratio of 200 in the presence of KOC(CH3)3 in 2-propanol, leading to (S)-1-phenylethanol with up to an enantiomeric excess (ee) of 67%.

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

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