Synthesis of a Water-Soluble Ruthenium Complex and Its Catalytic Activity for Acceptorless Alcohol Dehydrogenation in Aqueous Medium

Synlett ◽  
2018 ◽  
Vol 29 (12) ◽  
pp. 1644-1648 ◽  
Author(s):  
Senthilkumar Muthaiah ◽  
Anita Bhatia
Keyword(s):  
Catalytic Activity ◽  
Aqueous Medium ◽  
Ruthenium Complex ◽  
Water Soluble ◽  
Catalytic Cycle ◽  
Secondary Alcohols ◽  
Atom Economy ◽  
Hydrogen Acceptor ◽  
Alcohol Dehydrogenation ◽  
Acceptorless Alcohol Dehydrogenation

The synthesis of a ruthenium complex bearing a PN-chelating ligand is described. The complex, in the presence of KOH, enabled the synthesis of ketones from secondary alcohols in the absence of a hydrogen acceptor in aqueous medium. This synthetic protocol, which uses water as the medium, is green and has a high atom economy as it avoids the use of an acceptor and produces hydrogen as the sole ­byproduct. Mechanistic investigations revealed that the catalytic cycle involves a phosphine dissociative pathway.

Ruthenium-Promoted Acceptorless and Oxidant-Free Lactone Synthesis in Aqueous Medium

Synlett ◽  
2019 ◽  
Vol 30 (06) ◽  
pp. 721-725 ◽  
Author(s):  
Senthilkumar Muthaiah ◽  
Anita Bhatia ◽  
Muthukumar Kannan
Keyword(s):  
Aqueous Medium ◽  
Ruthenium Complexes ◽  
Water Soluble ◽  
Side Product ◽  
Mechanistic Studies ◽  
Hydrogen Acceptor ◽  
Water As Solvent ◽  
Lactone Synthesis

Ruthenium-catalyzed formation of lactones from diols in aqueous medium has been demonstrated. 1,3,5-Triazaphosphaadamantane (PTA) included water-soluble ruthenium complexes [RuCl2(PPh3)(2,6-Py-(CH2-PTA)2]·2Br and [RuCl2(PPh3)2(2-PyCH2PTA)]·Br in the presence of KOH were found to be efficient for the synthesis of lactones from diols. The reported synthetic protocol is green as it uses water as solvent, avoids the use of any hydrogen acceptor/oxidant, and produces hydrogen as the only side product. Mechanistic studies revealed that lactone formation involved aldehyde intermediate and followed dehydrogenative pathway.

Recyclable hydrotalcite catalysts for alcohol imination via acceptorless dehydrogenation

2015 ◽  
Vol 17 (4) ◽  
pp. 2271-2280 ◽  
Author(s):  
John Bain ◽  
Philip Cho ◽  
Adelina Voutchkova-Kostal
Keyword(s):  
Catalytic Activity ◽  
One Pot ◽  
Alcohol Dehydrogenation ◽  
Acceptorless Alcohol Dehydrogenation

Intrinsic catalytic activity of a series of hydrotalcite-like materials towards acceptorless alcohol dehydrogenation and one-pot imination.

scholarly journals Hydrosoluble Complexes Bearing Tris(pyrazolyl)methane Sulfonate Ligand: Synthesis, Characterization and Catalytic Activity for Henry Reaction

Catalysts ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 611
Author(s):  
Mahmoud ◽  
Martins ◽  
Silva ◽  
Pombeiro
Keyword(s):  
Catalytic Activity ◽  
Aqueous Medium ◽  
Coordination Compounds ◽  
Aromatic Aldehydes ◽  
Water Soluble ◽  
Henry Reaction ◽  
Methane Sulfonate ◽  
Experimental Conditions ◽  
Ligand Synthesis

The catalytic activity of the water-soluble scorpionate coordination compounds [Cu(-NN’O-Tpms)2] (1), [Mn(Tpms)2] (2) and Li[FeCl2(-NN’N’’-Tpms)] (3) [Tpms = tris(pyrazolyl)-methane sulfonate, O3SC(pz)3], were studied towards the (Henry) reaction between benzaldehyde and nitromethane or nitroethane in aqueous medium to afford, respectively, 2-nitro-1-phenylethanol or 2-nitro-1-phenylpropanol, the latter in the syn and the anti diastereoisomeric forms. Complex 1 exhibited the highest activity under the optimum experimental conditions and was used to broaden the scope of the reaction to include several aromatic aldehydes achieving yields up to 94%.

Conventional fluorophore-free dual pH- and thermo-responsive luminescent alternating copolymer

2016 ◽  
Vol 7 (45) ◽  
pp. 6895-6900 ◽  
Author(s):  
Biswajit Saha ◽  
Kamal Bauri ◽  
Arijit Bag ◽  
Pradip K. Ghorai ◽  
Priyadarsi De
Keyword(s):  
Aqueous Medium ◽  
Free Water ◽  
Water Soluble ◽  
Alternating Copolymer ◽  
Fluorescent Copolymer

Herein, we have designed and synthesized a novel traditional fluorophore-free water-soluble fluorescent copolymer based on a poly(maleimide-alt-styrene) skeleton, which responds to both pH and temperature in aqueous medium.

A ratiometric fluorogenic probe for the real-time detection of SO32−in aqueous medium: application in a cellulose paper based device and potential to sense SO32−in mitochondria

The Analyst ◽  
2018 ◽  
Vol 143 (1) ◽  
pp. 250-257 ◽  
Author(s):  
Soham Samanta ◽  
Senjuti Halder ◽  
Poulomi Dey ◽  
Utsab Manna ◽  
Aiyagari Ramesh ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Real Time ◽  
Water Soluble ◽  
Live Cells ◽  
The Real ◽  
Cellulose Paper ◽  
Fluorogenic Probe ◽  
Ratiometric Detection ◽  
Real Time Detection

A new water soluble and fluorogenic probe (L) that can demonstrate the specific ratiometric detection of a SO2derivative (SO32−) in 100% aqueous medium and live cells has been designed and synthesized.

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