Journal ArticleDOI
A Review of the Selective Catalytic Reduction of Aromatic Nitro Compounds into Aromatic Amines, Isocyanates, Carbamates, and Ureas Using CO.
Ahmed M. Tafesh,Jens Weiguny +1 more
TLDR
The use of CO as a reductant had been in the past confined to few reactions, but its use in organic synthesis, especially in the reductive carbonylation of nitro aromatics and the oxidative carbonylations of aromatic amines, has increased dramatically as mentioned in this paper.Abstract:
Although the use of CO as a reductant had been in the past confined to few reactions, its use in organic synthesis, especially in the reductive carbonylation of nitro aromatics and the oxidative carbonylation of aromatic amines, has increased dramatically. Since the discovery of CO-induced reduction of nitro groups, there has been a wide spread increase of interest in the application and mechanistic understanding of this reaction. In a major review published in 1988 it was noted, that in practice no studies of the mechanism of N-carbonylation of aromatic nitro compounds with alcohols leading to carbamates have been carried out. This review clearly shows a major change since that publication. Indeed, metal-catalyzed reductive carbonylation of nitro aromatics using CO as reducing agent has been in the past 10 years the subject of intense investigation both in academia and in the chemical industry. Several articles and reviews have covered the subject up to the late 1980s. The authors will concentrate on more recent literature, but sometimes older data will be used to establish an understanding of these reactions. 127 refs.read more
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Journal ArticleDOI
Cyclobutadiene Rhodium Complexes as Catalysts for the Synthesis of Amides from Electron-rich Arenes, Tosyl Azide and CO
TL;DR: In this article, the DFT calculations at the PBE/3ζ level revealed a new plausible mechanism for the reaction of TsN3 with CO via cycloaddition and formation of RhCON3 metallacycle.
Journal ArticleDOI
2,7-Dioxa-15,19-diazatricyclo[19,4,0,08,13]pentacosa-8,10,12,21,23,25(1)-hexaene
TL;DR: The C21H24N2O2 as mentioned in this paper is a macrocyclic multidentate Schiff base ligand containing two imine N and two ether O atoms which has a crystallographic twofold axis.
Journal ArticleDOI
Immobilized iron functionalised imidazolium-based ionic liquid: Solvent-free and recoverable heterogeneous catalytic application for the synthesis of amines under green conditions
M. Deepa,S. Uthayanila,Kannan Mariyammal,R. Shanmugapriya,Sivasankar Koppala,Karthikeyan Manivannan,Karthikeyan Parasuraman +6 more
TL;DR: In this paper , the authors reported solvent-free and recoverable heterogeneous iron functionalised imidazolium-based ionic liquid for the reduction of nitroarene derivatives in the presence of formic acid under greener conditions.
Journal ArticleDOI
Fabrication of Ruthenium Doped Ag@TiO2 Core-Shell Nanophotocatalyst for the Efficient Reduction of Nitrophenols
Tehmina Akhtar,Alexander J. Hill,Adarsh Bhat,Johannes W. Schwank,Habib Nasir,Syeda Aqsa Batool Bukhari,Effat Sitara +6 more
TL;DR: In this article , a novel [email protected]/TiO2 core-shell nanophotocatalyst with silver metal cores and ruthenium-doped TiO2 semiconductor shells has been fabricated via an impregnation method and was characterized by XRD, Raman spectroscopy, XPS, UV-vis DRS, STEM, EDX, photoluminescence (PL), FTIR, and BET analysis.
Journal ArticleDOI
Reduction of imines with a reusable bimetallic PdCo–Fe3O4 catalyst at room temperature under atmospheric pressure of H2
Sa-sha Yang,Byeong Moon Kim +1 more
TL;DR: In this paper , a new procedure for synthesizing amines by the reduction of imines with H2 at atmospheric pressure and room temperature in the presence of PdCo-Fe3O4 nanoparticles is reported.
References
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Journal ArticleDOI
Water-Soluble Ligands, Metal Complexes, and Catalysts: Synergism of Homogeneous and Heterogeneous Catalysis
TL;DR: Water-soluble catalysts as mentioned in this paper combine the advantages of homogeneous and heterogeneous catalysis: simple and complete separation of the product from the catalyst, high activity, and high selectivity.
Journal ArticleDOI
Transformations of Chloroarenes, Catalyzed by Transition-Metal Complexes
Vladimir V. Grushin,Howard Alper +1 more
Journal ArticleDOI
Palladium(II) catalysts for living alternating copolymerization of olefins and carbon monoxide
TL;DR: In this article, the synthesis of well-defined Pd(II) catalysts that operate in aprotic solvents to yield living alternating copolymers of olefins and CO was reported.
Journal ArticleDOI
Palladium Complex-Catalyzed Reductive N-Heterocyclization of Nitroarenes: Novel Synthesis of Indole and 2H-Indazole Derivatives
TL;DR: The dichlorobis(triphenylphosphine)palladium (PdCl 2 (PPh 3 ) 1 )-tin(II) chloride (SnCl 2 ) system showed high catalytic activity for the reductive N-heterocyclization of various 2-nitrostyrene and N-(2-nitrobenzylidene)amine derivatives when employed at 100 o C for 16 h under 20 kg cm -2 of initial carbon monoxide pressure, to give the corresponding indole and 2H-indazole derivatives in
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