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Samarium-promoted Chemoselective Reduction of aromatic nitro compounds in Ionic Liquid

Chinese Journal of Chemistry 2002年第9期20卷 925-928页

作者：郑兴良张永敏等 DepartmentofChemistry ZhejiangUniversity（CampusXixi）HangzhouZhejiang310028China StateKeyLaboratoryofOrganometallicChemistry ShanghaiInstituteofOrganicChemistryChinsesAcademyofSc

bState Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China The differently substituted aromatic nitro compounds were chemoselectively reduced by Sm/HOAc system in an ionic liquid medium to afford aromatic amines. Under these conditions the other substituents, such as -X, -CHO, -COOH, -CN, -NHTos and -alkyl, remained intact. The notable advantages of this reaction are its mild conditions, simple operation, short reaction time, high yields and easy recycling of ionic liquid.

关键词： ionic liquid samarium/HOAc system chemoselective reduction aromatic nitro compounds aromatic amines

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Palladium complex with functionalized β-cyclodextrin: Novel efficient catalyst for the reduction of aromatic nitro compounds in water

Palladium complex with functionalized β-cyclodextrin: Novel...

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中国化学会全国第十二届有机合成化学学术研讨会

作者： Guo,Ya-Fei Li,Jiu-Ling Zhao,Fen Jiang,Yu-Bo Yang,Rui Faculty of Life Science and Technology Kunming University of Science and Technology Faculty of Science Kunming University of Science and Technology

Supramolecular catalysis has proved to be an attractive strategy to carry out green processes with impressive *** them,cyclodextrins and modified cyclodextrins have constituted one of the most popular supramolecules used to reproduce the enzyme hydrophobic pocket.A water-soluble,macromolecular palladium complex(DACH-Pd-β-CD) catalytic system was designed and which based on functionalized β-*** showed high activity for the reduction of aromatic nitro compounds in neat water at room temperature(yields from 96%-99%,20 examples) and the catalyst were successfully characterized by the methods of transmission electron microscopy(TEM),Energy Dispersive spectrdmeter(EDS),X-ray diffraction(XRD),Thermogravimetric Analysis(TG),Fourier transform infrared spectroscopy(FT-IR) and NMR spectrum. Furthermore,the catalyst can be easily separated from the reaction mixture and still maintain high catalytic activity after ten cycles without *** with the classical reactions,the advantages of the green solvent(water),short reaction time(0.5-3h),low catalyst loading,high yields and reusability of the catalyst will be potentially applied to the industry.

关键词： Palladium complex β-cyclodextrin reduction aromatic nitro compounds

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Reduction of aromatic nitro compounds under Solvent-free Condition Using Almnina-suppored Hydrazine/Fe2 (NO3)3· 9H2O

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有机化学 2003年第Z1期23卷 109-109页

作者： WANG Yu-Lu ZHANG Chang-Rui Department of Chemical and Environmental Science Henan Normal University Xinxiang 453002 Department of Chemical and Environmental Science Henan Normal University Xinxiang 453002

　　The application of microwave techniques for chemical synthesis has attracted considerable interest in recent years because of their enhanced selectivity, reduced reaction time, easier work-up procedure. aromatic amines are widely used as intermediate for dyes, photographic materials, pharmaceutical and agricultural chemicals and as antioxidants. So, particularly intense interest has been directed toward the synthesis of these compounds. Reduction of aromatic nitro compounds is one of the important routes to prepare them. Generally, the processes have been carried out in solvent. [ 1 ～ 6] The drawback of these methods is long reaction time.……

关键词： reaction time aromatic nitro compounds agricultural chemicals chemical synthesis

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Zinc modification of Ni-Ti as efficient Ni_(x)Zn_(y)Ti_(1)catalysts with both geometric and electronic improvements for hydrogenation of nitroaromatics

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Frontiers of Chemical Science and Engineering 2022年第4期16卷 461-474页

作者： Pingle Liu Yu Liu Yang Lv Wei Xiong Fang Hao Hean Luo College of Chemical Engineering National&Local United Engineering Research Center for Chemical Process Simulation and IntensificationXiangtan UniversityXiangtan 411105China

The catalytic hydrogenation of nitroaromatics is an environmentally friendly technology for aniline production,and it is crucial to develop noble-metal-free catalysts that can achieve chemoselective hydrogenation of nitroaromatics under mild reaction *** this work,zinc-modified Ni-Ti catalysts(Ni_(x)Zn_(y)Ti_(1))were fabricated and applied for the hydrogenation of nitroaromatics *** was found that the introduction of zinc effectively increases the surface Ni density,enhances the electronic effect,and improves the interaction between Ni and TiO_(2),resulting in smaller Ni particle size,more oxygen vacancies,higher dispersion and greater concentration of Ni on the catalyst ***,the electron-rich Ni^(δ-) obtained by electron transfer from Zn and Ti to Ni effectively adsorbs and dissociates *** results reveal that Ni_(x)Zn_(y)Ti_(1)(Ni_(0.5)Zn_(0.5)Ti_(1))shows excellent catalytic performance under mild conditions(70℃and 6 bar).These findings provide a rational strategy for the development of highly active non-noble-metal hydrogenation catalysts.

关键词： bimetal strategy oxygen vacancy non-noble metal catalyst hydrogenation aromatic nitro compounds

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Immobilized silver nanoparticles on silica gel as an efficient catalyst in nitroarene reduction

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Chinese Chemical Letters 2010年第9期21卷 1015-1019页

作者： Ali Reza Kiasat Roya Mirzajani Fakhri Ataeian Mehdi Fallah-Mehrjardi Chemistry Department College of ScienceShahid Chamran University Marine Chemistry Department Khoramshahr Marine Science and Technology University

Nanoparticles have properties that can be fine-tuned by their size as well as ***,there is significant current interest in preparing nano-materials of small size dispersity and to arrange them in close-packed *** letter describes a way of synthesising silver nanoparticles and their protection to aggregate by silica *** combination of catalytic quantities of immobilized silver nanoparticles with reductive ability of NaBH_4 efficiently reduces aromatic nitroarenes to the corresponding amines in aqueous *** is that highly chemoselective reactions were achieved in the presence of other functional groups such as halogen and carboxylic acid *** silver particles immobilized on silica gel are stable in the presence of oxygen for several months.

关键词： Silver nanoparticle Reduction aromatic nitro compounds aromatic amines Sodium borohydride

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