555-03-3Relevant articles and documents
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.
Low-temperature and highly efficient liquid-phase catalytic nitration of chlorobenzene with NO2: Remarkably improving the para-selectivity in O2-Ac2O-Hβ composite system
Deng, Renjie,Liu, Pingle,Luo, He'an,Ni, Wenjin,You, Kuiyi,Zhao, Fangfang
, (2020/02/26)
In this work, we developed a low-temperature and efficient approach for the highly selective preparation of valuable p-nitrochlorobenzene from the liquid-phase catalytic nitration of chlorobenzene with NO2 in O2-Ac2O-Hβ composite system. The results demonstrated that the introduction of molecular oxygen remarkably enhanced the chlorobenzene conversion and the cooperation catalysis of Hβ zeolite and Ac2O envidently improved the selectivity to para-nitro product. Under the optimized reaction conditions, 93.6 % of the selectivity to p-nitrochlorobenzene with 84.0 % of chlorobenzene conversion was obtained, and the ratio of p-nitrochlorobenzene to o-nitrochlorobenzene could reach up to 20.3. Furthermore, the selectivity distribution of nitration products was reasonably explained by the density functional theory (DFT) calculation. Finally, the possible nitration reaction pathway of chlorobenzene with NO2 was suggested in O2-Ac2O-Hβ composite catalytic system. The present work affords a new and mild nitration approach for highly selective preparation of valuable para-nitro products, and has potential industrial application prospects.
Preparation method 3- methoxyl diphenylamine (by machine translation)
-
Paragraph 0008, (2020/04/17)
3 -methoxydiphenylamine, is obtained, by adding PEG - 800,methoxybenzonitrobenzene 140 °C to a high-pressure reaction kettle, and heating to 2h, after heating to, and heating the methanol, to react, with methanol to obtain, metoonitrobenzene. 3 - reaction liquid distilled dry solvent; is added to the high-pressure reaction kettle. 3 - and then reacted at room temperature, and stirred for, hours under reduced pressure . reaction solution is evaporated and distilled off under reduced pressure 90 °C, by a reaction solution distilled 10h from, a reaction, solution distilled, from a reaction, solution distilled from, a 3 - reaction solution evaporated; in a reaction solution of, a reaction, liquid distilled from, a reaction solution of a, reaction liquid distilled from a reaction, solution distilled from a reaction solution distilled from a reaction solution of a reaction solution. (by machine translation)
