108-42-9Relevant articles and documents
Nickel nanoparticles as efficient catalyst for electron transfer reactions
Rathore, Puran Singh,Patidar, Rajesh,Rathore, Sonika,Thakore, Sonal
, p. 439 - 446 (2014)
The catalytic efficiency of nickel nanoparticles was investigated in some electron transfer reactions. The nanoparticles brought about rapid roomtemperature reduction of a number of nitro aromatics in an aqueous medium with high chemoselectivity and also helped to speed up redox reaction of Fe(CN)-36and S2O-23. In addition, interesting results were obtained for microwave assisted decolourization of azo dye. The reactions were monitored through UV-Vis spectroscopy. The present study has additional advantages of reusability of catalysts and aqueous medium. The ultimate goal was to assess the suitability of low cost nanocatalyst for electron transfer reactions under aqueous conditions. Springer Science+Business Media New York 2013.
STUDY OF THE CATALYTIC ACTIVITY OF METAL COMPLEXES ATTACHED TO A SOLID SUPPORT. 6. REDUCTION OF NITROBENZENE AND ITS HALOGENATED DERIVATIVES BY CHEMICALLY BOUND HYDROGEN IN THE PRESENCE OF IMMOBILIZED Rh COMPLEXES.
Sharf, V. Z.,Dovganyuk, V. F.,Isaeva, V. I.,Maksimov, B. I.
, p. 468 - 472 (1989)
Rh complexes attached to modified silica gels catalyze the reaction of hydrogen transfer from 2-propanol (P-2) to cyclohexanone, styrene, allylbenzene, and cyclohexene-2-one.It was previously found that triphenylphosphine complexes of Rh and Ru are active in the reaction of reduction of nitrobenzene (NB) by 2-propanol.It is known that complex hydrides, NaBH4 in particular, are also used for reduction of NB on metal complexes.The catalytic properties of Rh complexes immobilized on silica gels containing amino groups and aminophosphine groups in reduction of NB and different halonitrobenzenes by transfer of hydrogen from P-2 and NaBH4 were investigated in the present study.
Hydrogenation of substituted aromatic nitrobenzenes over 1% 1.0 wt.%Ir/ZrO2 catalyst: Effect of meta position and catalytic performance
Campos, Cristian,Torres, Cecilia,Oportus, Marcelo,Pe?a, Miguel A.,Fierro,Reyes, Patricio
, p. 93 - 100 (2013)
This study is based on 1%Ir/ZrO2 catalyst which was studied in the hydrogenation of aromatic meta-substituted nitrobenzene in liquid phase. The catalyst was prepared by traditional impregnation method using IrCl3 and it has been characterized in terms of temperature-programmed reduction (TPR), ICP-MS, BET area, X-ray diffraction, HR-TEM and XPS measurements. The hydrogenation was evaluated in a batch type reactor at 298 K using ethanol like a solvent. The catalyst showed the formation of zero valent and partially oxidized Iridium (Irδ+) is established post-TPR and XPS characterization. The metal particle size exhibited a wide distribution with mean size 1.8 nm. Ir/ZrO2 was active in all the hydrogenation reactions with elevated conversion and promoted exclusive NO2 group reduction, resulting in the sole formation of the corresponding amino-compound except for CHO and CHCH2 meta-substituted nitrobenzene. We associate this response to a reducible group competition between NO2 and CHO or CHCH2. Reactant activation on the catalyst generates a negatively charged intermediate, consistent with a nucleophilic mechanism. The presence of electron-donating substituents is shown to decrease NO2 reduction rate. This effect is quantified in terms of the Hammett relationship where a linear correlation between the substituent constant (σi) and rate is established and a reaction constant (ρ) 0.639. The data generated provide the first report of the catalytic action of supported Ir in the hydrogenation of meta-substituted nitroarenes and establish the nature of the hydrogenation en liquid phase.
A suitable modified palladium immobilized on imidazolium supported ionic liquid catalysed transfer hydrogenation of nitroarenes
Atheeswari, Alagudurai,Kanimozhi, Nallusamy,Karthikeyan, Parasuraman,Shanmugapriya, Ramasamy
, (2021)
The first well-defined modified palladium immobilized on imidazolium supported ionic liquid catalyst has been developed for the transfer hydrogenation of nitroarenes to anilines in good to excellent yields with formic acid as reducing agent. This methodology applies eco-friendly a reducing agent which is non-toxic, water soluble, more stable and simpler to handle. Particularly, the process constitutes a rare model of base-free transfer hydrogenations. The catalyst was reused up to nine consecutive cycles without any significance loss in its activity.
A practical and selective reduction of nitroarenes using elemental sulfur and mild base
McLaughlin, Maureen A.,Barnes, David M.
, p. 9095 - 9097 (2006)
A method was developed to reduce aromatic nitro compounds to the corresponding anilines using sulfur and base. The method tolerates a range of functional groups on the benzene ring, avoids the use of hydrogen and transition metals and provides the anilines in moderate to high yields.
MIL-53 (Al) derived single-atom Rh catalyst for the selective hydrogenation of m-chloronitrobenzene into m-chloroaniline
Cao, Wenxiu,Chen, Shaohua,Chen, Tiehong,Li, Zhi,Lin, Lu,Luo, Wenhao,Qi, Haifeng,Song, Weiyu,Tang, Nanfang,Wang, Aiqin,Wang, Weiyin,Zou, Xiaoxuan
, p. 824 - 834 (2021)
The catalytic hydrogenation of halonitroarenes to haloanilines is a green and sustainable process for the production of key nitrogen-containing intermediates in fine chemical industry. Chemoselective hydrogenation poses a significant challenge, which requ
Catalytic applications of a versatile magnetically separable Fe-Mo (Nanocat-Fe-Mo) nanocatalyst
Gawande, Manoj B.,Branco, Paula S.,Nogueira, Isabel D.,Ghumman, C. Amjad A.,Bundaleski, Nenad,Santos, Aderito,Teodoro, Orlando M.N.D.,Luque, Rafael
, p. 682 - 689 (2013)
A novel nano-Fe3O4-MoO3 (Nanocat-Fe-Mo) catalyst was prepared via simple wet impregnation and characterized by several techniques. The synthesized Nanocat-Fe-Mo was found to be a highly active and efficient catalyst in the
Catalytic transfer hydrogenation of aromatic nitro compounds by employing ammonium formate and 5% platinum on carbon
Gowda,Mahesh
, p. 3639 - 3644 (2000)
Aromatic nitro compounds were reduced to respective amines in high yields by using 5% platinum on carbon with ammonium formate or formic acid as hydrogen donor. It was observed that the former was mote efficient donor than the later. Further we have found that reduction of nitro groups occurs without hydrogenolysis of halogens and the reducible substituents which remains unchanged under the reaction conditions.
Heterogeneous catalytic transfer hydrogenation of aromatic nitro and carbonyl compounds over cobalt(II) substituted hexagonal mesoporous aluminophosphate molecular sieves
Mohapatra, Susanta K,Sonavane, Sachin U,Jayaram, Radha V,Selvam, Parasuraman
, p. 8527 - 8529 (2002)
Catalytic transfer hydrogenation of aromatic nitro and carbonyl compounds was carried out using novel cobalt(II) substituted hexagonal mesoporous aluminophosphate molecular sieves. The catalyst showed excellent yield with good recycling capability.
Bio-synthesis and structural characterization of highly stable silver nanoparticles decorated on a sustainable bio-composite for catalytic reduction of nitroarenes
Baran, Talat
, p. 213 - 218 (2019)
Bio-polymers are the most significant natural alternative stabilizers compared to their synthetic counterparts for fabrication of noble metal nanoparticles because of their higher thermal stability, renewability, low cost, eco-friendliness, strong mechanical capacity, and biodegradability properties. Therefore, a new bio-composite (CMC-Pct-AG), which is consisted of sodium carboxymethyl cellulose, agar, and pectin natural biopolymers, was fabricated as an immobilizing agent in this study. Then, highly stable silver nanoparticles (Ag NPs@CMC-AG-Pct) were successfully decorated on the surface of designed CMC-Pct-AG without the use of any hazardous reducing agents, and their chemical structures were illuminated with Uv–Vis, FT-IR, TG/DTG, SEM, EDS, XRD, and ICP-OES analyses. Subsequently, the catalytic performance of Ag NPs@CMC-AG-Pct was studied in the reduction of various nitroarenes in the presence of NaBH4 at room temperature. These tests indicate that Ag NPs@CMC-AG-Pct is an efficient catalyst which converts nitroarenes to desired amines with good yields and short reaction times. Reproducibility of the catalyst was also investigated, and it is found that Ag NPs@CMC-AG-Pct served several times as a retrievable and reusable catalyst for catalytic reduction of nitroarenes.
