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
Demetalation of Silver(III) Corrolates
Manuela Stefanelli,Jing Shen,Weihua Zhu,M. Mastroianni,Federica Mandoj,Sara Nardis,Zhongping Ou,Karl M. Kadish,Frank R. Fronczek,Kevin M. Smith,Roberto Paolesse +10 more
TL;DR: Electrochemical and chemical reductive methods for silver(III) corrolates demetalation were tested with the aim to avoid the formation of isocorroles and a successful approach was obtained using DBU/THF solutions which afforded the 3-NO(2) corrole free-base compound as a single reaction product in good yield.
Journal ArticleDOI
Room Temperature, Metal-Free Arylation of Aliphatic Alcohols
TL;DR: Diaryliodonium salts are demonstrated as efficient arylating agents of aliphatic alcohols under metal-free conditions and the methodology has been applied to the formal synthesis of butoxycaine.
Journal ArticleDOI
Bonding and Structure of Copper Nitrenes
TL;DR: The ground-state (open-shell) singlet copper nitrene is found to be highly multiconfigurational and to possess a bent geometry about the nitrene nitrogen, contrasting with the linear nitrene geometry of the triplet copper nitrenes.
Journal ArticleDOI
Highly efficient and chemoselective transfer hydrogenation of nitroarenes at room temperature over magnetically separable Fe–Ni bimetallic nanoparticles
TL;DR: In this article, a highly chemoselective catalytic transfer hydrogenation (CTH) of nitroarenes to corresponding amino derivatives is achieved with Fe-Ni bimetallic nanoparticles (FeNi NP's) as the catalyst and NaBH4 at room temperature.
Journal ArticleDOI
Insight into Single-Atom-Induced Unconventional Size Dependence over CeO2-Supported Pt Catalysts
Chunpeng Wang,Shanjun Mao,Zhe Wang,Yuzhuo Chen,Wentao Yuan,Yang Ou,Hao Zhang,Yutong Gong,Yong Wang,Bingbao Mei,Zheng Jiang +10 more
TL;DR: In this paper, an upturned volcanic curve toward the selectivity of p-chloroaniline was found by decreasing the size of Pt from nanoparticles to single atoms, and an unconventional size dependence of Pt toward selective hydrogenation of P-chloronitrobenzene has been extensively investigated over CeO2 support.
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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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