An efficient ligand free chemoselective transfer hydrogenation of olefinic bonds by palladium nanoparticles in an aqueous reaction medium

RSC Advances ◽  
2014 ◽  
Vol 4 (62) ◽  
pp. 32834-32839 ◽  
Author(s):  
Dattatraya B. Bagal ◽  
Bhalchandra M. Bhanage
Keyword(s):  
Catalytic System ◽  
Palladium Nanoparticles ◽  
Reaction Medium ◽  
Transfer Hydrogenation ◽  
Effective Catalyst ◽  
Ligand Free ◽  
Unsaturated Carbonyls

An efficient ligand free catalytic system was developed for chemoselective 1,4-reduction of various α,β-unsaturated carbonyls by palladium nanoparticles in aqueous reaction medium with excellent chemoselectivity and effective catalyst recyclability.

Transfer hydrogenation of nitroarenes into anilines by palladium nanoparticles via dehydrogenation of dimethylamine borane complex

RSC Advances ◽  
2015 ◽  
Vol 5 (105) ◽  
pp. 86529-86535 ◽  
Author(s):  
Nilesh M. Patil ◽  
Manohar A. Bhosale ◽  
Bhalchandra M. Bhanage
Keyword(s):  
Catalytic System ◽  
Palladium Nanoparticles ◽  
Reducing Agent ◽  
Water Soluble ◽  
Transfer Hydrogenation ◽  
Dimethylamine Borane

Reduction of nitroarenes to corresponding amines ​via dehydrogenation of dimethylamine borane using Pd NPs as a catalyst. The developed catalytic system uses dimethylamine borane as a reducing agent which is highly stable, water soluble and non-toxic.

Ligand-Free and Recyclable Palladium(II) Acetate Catalyzes the Decarboxylative Cross-Coupling of Alkynyl Carboxylic Acids with Arylboronic Acids in Aqueous PEG-400

Synlett ◽  
2020 ◽  
Vol 31 (08) ◽  
pp. 793-796
Author(s):  
Bo-Xiao Tang ◽  
Hong Zou ◽  
Bao-Xing Xie ◽  
Hai-Qing Zhong ◽  
Yi-Hua Wang ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Catalytic System ◽  
Reaction Medium ◽  
Cross Coupling ◽  
Poly Ethylene Glycol ◽  
Arylboronic Acids ◽  
Peg 400 ◽  
Ligand Free ◽  
Internal Alkynes ◽  
Poly Ethylene

A novel and ligand-free method was developed for the decarboxylative cross-coupling of alkynylcarboxylic acids with arylboronic acids. By using an environmentally friendly H2O–poly(ethylene glycol) (PEG-400) system as the reaction medium, a series of internal alkynes were synthesized in good yields and with remarkable selectivity. The Pd(OAc)2–H2O–PEG-400 catalytic system could be used for up to three cycles without any loss of activity, demonstrating the robustness of the approach.

scholarly journals Bis-NHC–Ag/Pd(OAc)2 Catalytic System Catalyzed Transfer Hydrogenation Reaction

Catalysts ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 8
Author(s):  
Hui-Ju Chen ◽  
Chien-Cheng Chiu ◽  
Tsui Wang ◽  
Dong-Sheng Lee ◽  
Ta-Jung Lu
Keyword(s):  
Functional Groups ◽  
Catalytic System ◽  
High Efficiency ◽  
Aqueous Media ◽  
Hydrogenation Reaction ◽  
Transfer Hydrogenation ◽  
Terminal Alkynes ◽  
Wide Range ◽  
Transfer Hydrogenation Reaction

The bis-NHC–Ag/Pd(OAc)2 catalytic system (NHC = N-heterocyclic carbene), a combination of bis-NHC–Ag complex and Pd(OAc)2, was found to be a smart catalyst in the Pd-catalyzed transfer hydrogenation of various functionalized arenes and internal/terminal alkynes. The catalytic system demonstrated high efficiency for the reduction of a wide range of various functional groups such as carbonyls, alkynes, olefins, and nitro groups in good to excellent yields and high chemoselectivity for the reduction of functional groups. In addition, the protocol was successfully exploited to stereoselectivity for the transformation of alkynes to alkenes in aqueous media under air. This methodology successfully provided an alternative useful protocol for reducing various functional groups and a simple operational protocol for transfer hydrogenation.

A highly efficient copper and ligand free protocol for the room temperature Sonogashira reaction

RSC Advances ◽  
2015 ◽  
Vol 5 (1) ◽  
pp. 16-19 ◽  
Author(s):  
Ankur Gogoi ◽  
Anindita Dewan ◽  
Utpal Bora
Keyword(s):  
Catalytic System ◽  
Room Temperature ◽  
Sonogashira Reaction ◽  
Highly Efficient ◽  
Aryl Iodides ◽  
Ligand Free

A mild and efficient catalytic system based on PdCl2 and Na2SO4 has been developed for the Sonogashira reaction of aryl iodides at room temperature.

scholarly journals Asymmetric transfer hydrogenation of prochiral ketones catalyzed by aminosulfonamide-ruthenium complexes in ionic liquid

2011 ◽  
Vol 9 (1) ◽  
pp. 175-179 ◽  
Author(s):  
Zhongqiang Zhou ◽  
Yong Sun ◽  
Aiqing Zhang
Keyword(s):  
Ionic Liquid ◽  
Catalytic System ◽  
Ruthenium Complexes ◽  
Transfer Hydrogenation ◽  
Asymmetric Transfer Hydrogenation ◽  
Prochiral Ketones

AbstractChiral aminosulfonamides containing imidazolium group were used as ligands for the ruthenium(II)-catalyzed asymmetric transfer hydrogenation of prochiral ketones in ionic liquid, affording good to excellent conversions and enantiomeric excesses. The catalytic system could be easily recovered and reused several times.

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