615-66-7Relevant articles and documents
Ni-W2C/mpg-C3N4 as a promising catalyst for selective hydrogenation of nitroarenes to corresponding aryl amines in the presence of Lewis acid
Zhao, Zhongkui,Yang, Hongling
, p. 268 - 274 (2015)
The selective hydrogenation of nitroarenes to their corresponding aryl amines has been investigated over the supported nickel propoted tungsten carbide catalyst on polymeric mesoporous graphitic carbon nitride (Ni-W2C/mpg-C3N4) in the presence of Lewis acid. The Ni-W2C/mpg-C3N4 is demonstrated much higher catalytic activity and selectivity for the selective hydrogenation of nitrobenzene than the supported Ni-W2C catalyst on activated carbon (Ni-W2C/AC) and mesoporous carbon (Ni-W2C/CMK-3), and the developed Ni-W2C/mpg-C3N4 also exhibits excellent catalytic properties for the selective hydrogenation of various substrates comprising the extra reducible functionalized groups besides nitro group to diverse functionalized arylamines, industrially important compounds, offering more than 92% of yield with 100% selectivity, which may be ascribed to the strengthened mass transfer by using mesoporous support, intentified synergistic effect between Ni-W2C/mpg-C3N4 and Lewis acid owing to the basicity of mpg-C3N4, as well as the improved reducibility of NiO-WO3 and the dispersion of Ni-W2C. It can be also found that the developed catalyst could be easily recovered by filtration and recycled many times without visible loss in its catalytic performance. The significantly improved catalytic properties of supported Ni-W2C catalyst fabricated by using mpg-C3N4 as a superior carrier in the presence of Lewis acid allows it to be a promising candidate for the clean and highly-efficient synthesis of diverse functionalized arylamines through the selectivie hydrogenation of substituted nitroarenes.
A highly efficient LaOCl supported Fe-Fe3C-based catalyst for hydrogenation of nitroarenes fabricated by coordination-assisted pyrolysis
Li, Guangming,Li, Weizuo,Li, Xuewei,She, Wei,Wang, Jing
, p. 4627 - 4635 (2021/07/12)
Bi-metal-organic framework (bi-MOF) derived carbon-based catalysts have exhibited considerable potential for hydrogenation reactions; however, designing suitable bi-MOFs to fabricate highly efficient catalysts is still a great challenge. Herein, an efficient LaOCl supported Fe-Fe3C-based carbon-nitrogen catalyst (Fe-Fe3C-LaOCl/CN-hmta) was first prepared by bi-MOF (La-salenFe@HMTA)-templated pyrolysis. La-salenFe@HMTAwas synthesizedviathe coordination-assisted method,e.g., it is prepared by the coordination of N from the rich free imine (-CHN-) groups located on the La-salen complex to the Fe3+ions from Fe@HMTA. Catalytic experiments reveal that Fe-Fe3C-LaOCl/CN-hmta as a hydrogenation catalyst exhibits excellent performance for hydrogenation of nitroarenes in comparison with catalysts derived from Fe-urea MOFs (Fe-Fe3C-LaOCl/CN-urea) and Fe(NO3)3·9H2O derived catalysts (Fe-Fe3C-LaOCl/CN). On the basis of the nature of Fe-Fe3C-LaOCl/CN-hmta and the reaction results, it is concluded that the unique catalytic efficiency of Fe-Fe3C-LaOCl/CN-hmta depends significantly on the synergistic effect of Fe and Fe3C, large specific surface area and abundant structural defects. This piece of research provides a new approach for preparing highly efficient and stable Fe-Fe3C-based catalysts for hydrogenation of nitroarenesviathe coordination-assisted pyrolysis (CAP) method.
Mechanochemical catalytic transfer hydrogenation of aromatic nitro derivatives
Portada, Tomislav,Margeti?, Davor,?trukil, Vjekoslav
supporting information, (2018/12/11)
Mechanochemical ball milling catalytic transfer hydrogenation (CTH) of aromatic nitro compounds using readily available and cheap ammonium formate as the hydrogen source is demonstrated as a simple, facile and clean approach for the synthesis of substituted anilines and selected pharmaceutically relevant compounds. The scope of mechanochemical CTH is broad, as the reduction conditions tolerate various functionalities, for example nitro, amino, hydroxy, carbonyl, amide, urea, amino acid and heterocyclic. The presented methodology was also successfully integrated with other types of chemical reactions previously carried out mechanochemically, such as amide bond formation by coupling amines with acyl chlorides or anhydrides and click-type coupling reactions between amines and iso(thio)cyanates. In this way, we showed that active pharmaceutical ingredients Procainamide and Paracetamol could be synthesized from the respective nitro-precursors on milligram and gram scale in excellent isolated yields.
