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
Citations
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An efficient one-pot synthesis of N,N′-disubstituted ureas and carbamates from N-acylbenzotriazoles
TL;DR: In this paper, a facile and high-yielding one-pot synthesis of carbamates and N,N-disubstituted symmetrical ureas from N-acylbenzotriazoles has been devised.
Journal ArticleDOI
Hollow mesoporous SiO2 sphere nanoarchitectures with encapsulated silver nanoparticles for catalytic reduction of 4-nitrophenol
Wei-qiang Li,Xiao Ge,Xiao Ge,Hao Zhang,Qianqian Ding,Hualin Ding,Yunxia Zhang,Guozhong Wang,Haimin Zhang,Huijun Zhao,Huijun Zhao +10 more
TL;DR: In this paper, a pre-shell/post-core approach combined with a laser ablation treatment strategy was used to fabricate a sophisticated catalyst architecture configured with a hollow mesoporous SiO2 (hm-SiO2) sphere shell and multiple encapsulated Ag nanoparticle (NP) yolks.
Journal ArticleDOI
Superparamagnetic Fe3O4 Nanoparticles in a Deep Eutectic Solvent: An Efficient and Recyclable Catalytic System for the Synthesis of Primary Carbamates and Monosubstituted Ureas
Journal ArticleDOI
Iron and Palladium(II) Phthalocyanines as Recyclable Catalysts for Reduction of Nitroarenes
Praveen Kumar Verma,Praveen Kumar Verma,Manju Bala,Manju Bala,Kavita Thakur,Upendra Sharma,Upendra Sharma,Neeraj Kumar,Bikram Singh,Bikram Singh +9 more
TL;DR: In this article, an efficient recyclable catalytic system for the reduction of aromatic nitro compounds to corresponding amines using diphenylsilane/sodium borohydride as hydrogen sources in ethanol has been established.
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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