T:Toxic;91-23-6Relevant articles and documents
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Ismailski,Rosorenow
, (1923)
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Photoinduced Iron-Catalyzed ipso-Nitration of Aryl Halides via Single-Electron Transfer
Wu, Cunluo,Bian, Qilong,Ding, Tao,Tang, Mingming,Zhang, Wenkai,Xu, Yuanqing,Liu, Baoying,Xu, Hao,Li, Hai-Bei,Fu, Hua
, p. 9561 - 9568 (2021/08/06)
A photoinduced iron-catalyzed ipso-nitration of aryl halides with KNO2 has been developed, in which aryl iodides, bromides, and some of aryl chlorides are feasible. The mechanism investigations show that the in situ formed iron complex by FeSO4, KNO2, and 1,10-phenanthroline acts as the light-harvesting photocatalyst with a longer lifetime of the excited state, and the reaction undergoes a photoinduced single-electron transfer (SET) process. This work represents an example for the photoinduced iron-catalyzed Ullmann-type couplings.
High-efficiency green production process of o-aminoanisole
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Paragraph 0031-0041, (2021/08/19)
The invention discloses a high-efficiency green production process of o-aminoanisole, which comprises o-chloronitrobenzene and methanol, and the production process comprises the following steps: a, respectively adding the o-chloronitrobenzene, the methanol and a catalyst A into a methoxylation solvent, controlling the temperature at 20-80 DEG C, and adding an alkali in batches to carry out methoxylation reaction, b, filtering and washing the catalyst A-containing mixed solution obtained in the step a to obtain a high-purity intermediate product o-nitroanisole solution; c, directly carrying out hydrogenation reaction on the o-nitroanisole solution in the step b without separation to obtain an o-aminoanisole solution; and d, filtering the o-aminoanisole solution in the step c, removing the solvent, and carrying out reduced pressure distillation to obtain the o-aminoanisole with the purity of 99.5% or above. According to the process, the catalyst A capable of improving the reaction rate is adopted, so that the reaction conditions become milder, the reaction time is shortened, side reactions are greatly inhibited, the catalyst is easy and convenient to recycle, and the continuous application frequency is not less than 20.
Nitration of aromatics with dinitrogen pentoxide in a liquefied 1,1,1,2-tetrafluoroethane medium
Fauziev, Ruslan V.,Kharchenko, Alexandr K.,Kuchurov, Ilya V.,Zharkov, Mikhail N.,Zlotin, Sergei G.
, p. 25841 - 25847 (2021/08/09)
Regardless of the sustainable development path, today, there are highly demanded chemical productions still operating that bear environmental and technological risks inherited from the previous century. The fabrication of nitro compounds, and nitroarenes in particular, is traditionally associated with acidic wastes formed in nitration reactions exploiting mixed acids. However, nitroarenes are indispensable for industrial and military applications. We faced the challenge and developed a greener, safer, and yet effective method for the production of nitroaromatics. The proposed approach comprises the application of an eco-friendly nitrating agent, namely dinitrogen pentoxide (DNP), in the medium of liquefied 1,1,1,2-tetrafluoroethane (TFE) - one of the most non-hazardous Freons. Importantly, the used TFE is not emitted into the atmosphere but is effortlessly recondensed and returned into the process. DNP is obtainedviathe oxidation of dinitrogen tetroxide with ozone. The elaborated method is characterized by high yields of the targeted nitro arenes, mild reaction conditions, and minimal amount of easy-to-utilize wastes.
