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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Posted ContentDOI
Supported Bimetallic AuPd Nanoparticles as Catalyst for the Solvent-Free Selective Hydrogenation of Nitroarenes
Ruiyang Qu,Margherita Macino,Sarwat Iqbal,Xiang Gao,Qian He,Graham J. Hutchings,Meenakshisundaram Sankar +6 more
TL;DR: In this paper, the authors used supported AuPd nanoparticles catalyst, prepared by modified impregnation method (MIm), as efficient catalyst for selective hydrogenation of nitrobenzene.
Journal ArticleDOI
Se reduction by CO/H2O in ionic liquid: acceleration effect by activating water molecules
Liyuan Chai,Yang Bentao,Xu Yan,Fangfang Zhu,Yutai Wang,Hui Liu,Zhang Cong,Jixin Xu,Shuhui Men +8 more
TL;DR: In this paper, the effect of the structure of anions and cations in ionic liquid, and water content on the Se reduction rate was investigated using UV-vis spectroscopy.
Journal ArticleDOI
A uniformly anchored zirconocene complex on magnetic reduced graphene oxide (rGO@Fe3O4/ZrCp2Clx (x = 0, 1, 2)) as a novel and reusable nanocatalyst for synthesis of N-arylacetamides and reductive-acetylation of nitroarenes
TL;DR: In this paper , a crafted zirconocene complex on rGO@Fe3O4 as a novel magnetic nanocatalyst was synthesized and then characterized using FT-IR, SEM, EDX, VSM, ICP-OES, TGA, BET and MS analyses.
Journal Article
Clean technology for synthesizing diphenylmethane diisocyanate
TL;DR: The recent advances in the main clean processes to synthesize diphenylmethane diisocyanates (MDI) are reviewed in this article, such as BTC method,condensation of aniline, reductive carbonylation of nitrobenzene,oxidative carbonylations of anILine,methoxycarbonylation and coupling process, and alcoholysis of N,N′-diphenyl urea.
OtherDOI
Fluorescent Probes for Intracellular Carbon Monoxide Detection
TL;DR: In this paper , the authors look specifically at the mechanistic approaches toward CO detection, key advances of specific probe classes that allow for lower limits of detection (LODs), and other important characteristics such as shifted emission wavelengths.
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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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