New N,N,N-Donors Resulting in Highly Active Ruthenium Catalysts for Transfer Hydrogenation at Room Temperature

2011 ◽  
Vol 2011 (23) ◽  
pp. 3431-3437 ◽  
Author(s):  
Leila Taghizadeh Ghoochany ◽  
Saeid Farsadpour ◽  
Yu Sun ◽  
Werner R. Thiel
Keyword(s):  
Room Temperature ◽  
Ruthenium Catalysts ◽  
Transfer Hydrogenation ◽  
Highly Active

scholarly journals Correction: Room temperature iron catalyzed transfer hydrogenation using n-butanol and poly(methylhydrosiloxane)

2021 ◽  
Author(s):  
Thomas G. Linford-Wood ◽  
Nathan T. Coles ◽  
Ruth L. Webster
Keyword(s):  
Room Temperature ◽  
Transfer Hydrogenation

Correction for ‘Room temperature iron catalyzed transfer hydrogenation using n-butanol and poly(methylhydrosiloxane)’ by Thomas G. Linford-Wood et al., Green Chem., 2021, 23, 2703–2709, DOI: 10.1039/D0GC04175K.

scholarly journals H/D Exchange Under Mild Conditions in Arenes and Unactivated Alkanes with C6D6 and D2O Using Rigid, Electron-rich Iridium PCP Pincer Complexes

2020 ◽  
Author(s):  
Joel D. Smith ◽  
George Durrant ◽  
Daniel Ess ◽  
Warren Piers
Keyword(s):  
Hydrogen Isotope ◽  
Isotope Exchange ◽  
Room Temperature ◽  
Pincer Complexes ◽  
Synthesis And Characterization ◽  
Hydrogen Isotope Exchange ◽  
Mild Conditions ◽  
Highly Active ◽  
Pcp Pincer

<div>The synthesis and characterization of an iridium polyhydride complex (Ir-H4)</div><div>supported by an electron-rich PCP framework is described. This complex readily loses molecular</div><div>hydrogen allowing for rapid room temperature hydrogen isotope exchange (HIE) at the hydridic</div><div>positions and the α-C-H site of the ligand with deuterated solvents such as benzene-d6, toluene-d8</div><div>and THF-d8. The removal of 1-2 equivalents of molecular H2 forms unsaturated iridium carbene</div><div>trihydride (Ir-H3) or monohydride (Ir-H) compounds that are able to create further unsaturation</div><div>by reversibly transferring a hydride to the ligand carbene carbon. These species are highly active</div><div>hydrogen isotope exchange (HIE) catalysts using C6D6 or D2O as deuterium sources for the</div><div>deuteration of a variety of substrates. By modifying conditions to influence the Ir-Hn speciation,</div><div>deuteration levels can range from near exhaustive to selective only for sterically accessible sites.</div><div>Preparative level deuterations of select substrates were performed allowing for procurement of</div><div>>95% deuterated compounds in excellent isolated yields; the catalyst can be regenerated by</div><div>treatment of residues with H2 and is still active for further reactions.</div>

scholarly journals Dinuclear thiazolylidene copper complex as highly active catalyst for azid–alkyne cycloadditions

2016 ◽  
Vol 12 ◽  
pp. 1566-1572 ◽  
Author(s):  
Anne L Schöffler ◽  
Ata Makarem ◽  
Frank Rominger ◽  
Bernd F Straub
Keyword(s):  
Acetic Acid ◽  
Organic Solvents ◽  
Copper Complex ◽  
Room Temperature ◽  
Active Catalyst ◽  
Catalyst Design ◽  
Ancillary Ligand ◽  
Click Reactions ◽  
Highly Active ◽  
Cost Efficient

A dinuclear N-heterocyclic carbene (NHC) copper complex efficiently catalyzes azide–alkyne cycloaddition (CuAAC) “click” reactions. The ancillary ligand comprises two 4,5-dimethyl-1,3-thiazol-2-ylidene units and an ethylene linker. The three-step preparation of the complex from commercially available starting compounds is more straightforward and cost-efficient than that of the previously described 1,2,4-triazol-5-ylidene derivatives. Kinetic experiments revealed its high catalytic CuAAC activity in organic solvents at room temperature. The activity increases upon addition of acetic acid, particularly for more acidic alkyne substrates. The modular catalyst design renders possible the exchange of N-heterocyclic carbene, linker, sacrificial ligand, and counter ion.

Aqueous Room-Temperature Gold-Catalyzed Chemoselective Transfer Hydrogenation of Aldehydes

2009 ◽  
Vol 15 (44) ◽  
pp. 11833-11836 ◽  
Author(s):  
Lin He ◽  
Ji Ni ◽  
Lu-Cun Wang ◽  
Feng-Jiao Yu ◽  
Yong Cao ◽  
...  
Keyword(s):  
Room Temperature ◽  
Transfer Hydrogenation
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