Homobimetallic Ruthenium(II) Complexes Catalysed Selective Transfer Hydrogenation of Aldehydes in Water DOI
Gopal Deshmukh, Thakur Rochak Kumar Rana, Gopalan Rajaraman

et al.

Chemistry - An Asian Journal, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 12, 2024

Abstract Herein we report chemoselective transfer hydrogenation (TH) of aldehydes in aqueous medium using a series homobimetallic Ru(II) catalysts. Two complexes ( Ru1 and Ru3 ) one monometallic complex Ru2 have been employed the catalytic reduction aldehydes. Bimetallic [( p ‐cymene) 2 (RuCl) L 3 ] is obtained from reaction Schiff base ligand 2,2′‐((1E,1′E)‐((3,3′,5,5′‐tetraisopropyl‐[1,1′‐biphenyl]‐4,4′diyl)bis(azaneylylidene))bis(methaneylylidene))bis(4‐bromophenol) H characterized by various spectroscopic analytical techniques. The use formic acid/formate buffer as hydride source catalyst loading 0.01 mol % or resulted conversion to corresponding alcohols good excellent yield. This method very efficient for selective presence other reducible functional groups. A 0.0001 sufficient achieve turnover frequency (TOF) 5.5×10 5 h −1 . Furthermore, can recycled reused six consecutives cycles without sacrificing efficiency. comparison results between bimetallic offers valuable insights into distinct reactivity patterns complexes, presumably originating cooperative effect. To understand detailed mechanism, explored mechanistic pathway DFT methods on reported catalysts models which indicate that addition aldehyde rate‐limiting cooperativity boost efficiency case dinuclear catalyst. pH dependent TH mechanism has investigated with aid NMR ESI‐MS

Language: Английский

Synthesis, Characterization and Application of NNN Pincer Manganese Complexes with Pyrazole Framework in α-Alkylation Reaction DOI Creative Commons
Tao Wang, Yongli Xu,

Mengxin Du

et al.

Molecules, Journal Year: 2025, Volume and Issue: 30(7), P. 1465 - 1465

Published: March 26, 2025

A series of novel NNN pincer manganese complexes based on pyrazole skeleton 4 were efficiently synthesized in a two-step process. All the new fully characterized by 1H, 13C NMR spectra. Furthermore, molecular structures 4a and 4c also determined X-ray single-crystal diffraction. The manganese(I) catalysts obtained showed efficient catalytic activity α-alkylation reaction ketones with alcohols. Under optimal conditions, expected products procured moderate to high yields.

Language: Английский

Citations

0
Homobimetallic Ruthenium(II) Complexes Catalysed Selective Transfer Hydrogenation of Aldehydes in Water DOI
Gopal Deshmukh, Thakur Rochak Kumar Rana, Gopalan Rajaraman

et al.

Chemistry - An Asian Journal, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 12, 2024

Abstract Herein we report chemoselective transfer hydrogenation (TH) of aldehydes in aqueous medium using a series homobimetallic Ru(II) catalysts. Two complexes ( Ru1 and Ru3 ) one monometallic complex Ru2 have been employed the catalytic reduction aldehydes. Bimetallic [( p ‐cymene) 2 (RuCl) L 3 ] is obtained from reaction Schiff base ligand 2,2′‐((1E,1′E)‐((3,3′,5,5′‐tetraisopropyl‐[1,1′‐biphenyl]‐4,4′diyl)bis(azaneylylidene))bis(methaneylylidene))bis(4‐bromophenol) H characterized by various spectroscopic analytical techniques. The use formic acid/formate buffer as hydride source catalyst loading 0.01 mol % or resulted conversion to corresponding alcohols good excellent yield. This method very efficient for selective presence other reducible functional groups. A 0.0001 sufficient achieve turnover frequency (TOF) 5.5×10 5 h −1 . Furthermore, can recycled reused six consecutives cycles without sacrificing efficiency. comparison results between bimetallic offers valuable insights into distinct reactivity patterns complexes, presumably originating cooperative effect. To understand detailed mechanism, explored mechanistic pathway DFT methods on reported catalysts models which indicate that addition aldehyde rate‐limiting cooperativity boost efficiency case dinuclear catalyst. pH dependent TH mechanism has investigated with aid NMR ESI‐MS

Language: Английский

Citations

0