73604-31-6Relevant articles and documents
Selective catalysis for the reductive amination of furfural toward furfurylamine by graphene-co-shelled cobalt nanoparticles
Liu, Jianguo,Ma, Longlong,Zhong, Shurong,Zhuang, Xiuzheng
, p. 271 - 284 (2022/01/19)
Amines with functional groups are widely used in the manufacture of pharmaceuticals, agricultural chemicals, and polymers but most of them are still prepared through petrochemical routes. The sustainable production of amines from renewable resources, such as biomass, is thus necessary. For this reason, we developed an eco-friendly, simplified, and highly effective procedure for the preparation of a non-toxic heterogeneous catalyst based on earth-abundant metals, whose catalytic activity on the reductive amination of furfural or other derivatives (more than 24 examples) proved to be broadly available. More surprisingly, the cobalt-supported catalyst was found to be magnetically recoverable and reusable up to eight times with an excellent catalytic activity; on the other hand, the gram-scale tests catalyzed by the same catalyst exhibited the similar yield of the target products in comparison to its smaller scale, which was comparable to the commercial noble-based catalysts. Further results from a series of analytical technologies involving XRD, XPS, TEM/mapping, and in situ FTIR revealed that the structural features of the catalyst are closely in relation to its catalytic mechanisms. In simple terms, the outer graphitic shell is activated by the electronic interaction as well as the induced charge redistribution, enabling the easy substitution of the –NH2 moiety toward functionalized and structurally diverse molecules, even under very mild industrially viable and scalable conditions. Overall, this newly developed catalyst introduces the synthesis of amines from biomass-derived platforms with satisfactory selectivity and carbon balance, providing cost-effective and sustainable access to the wide applications of reductive amination.
2-(3-Hydroxybenzyl)benzo[d]isothiazol-3(2H)-one Mannich base derivatives as potential multifunctional anti-Alzheimer’s agents
He, Yuxi,Xiao, Ganyuan,Yu, Guangjun,Song, Qing,Zhang, Heng,Liu, Zhuoling,Tan, Zhenghuai,Deng, Yong
, p. 1249 - 1264 (2021/05/11)
A series of 2-(3-hydroxybenzyl)benzo[d]isothiazol-3(2H)-one Mannich base derivatives were designed as potential multifunctional agents against Alzheimer’s disease. The twelve derivatives were synthesized and evaluated with various biological activities. I
Method for synthesizing hydroxybenzylamine
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Paragraph 0043-0045, (2020/02/27)
The invention discloses a method for synthesizing hydroxybenzylamine, and belongs to the technical field of organic synthesis. The principle of the method comprises that a demethylation reaction is carried out on methoxybenzylamine under the action of hydrobromic acid; the method is characterized in that methoxybenzylamine and hydrobromic acid are distilled in a reflux state to remove redundant water so as to increase the reaction temperature and increase the concentration of the hydrobromic acid in a reaction mixture, so that the demethylation effect of hydrobromic acid on methoxybenzylamineis enhanced, the reaction time is shortened, and the conversion rate is increased; when no bromomethane gas generation is observed, distillation is continued, excessive hydrobromic acid is recovered to further improve the reaction temperature and the conversion rate, meanwhile, the consumption of the raw material hydrobromic acid is reduced, and the treatment capacity of subsequent steps and the consumption of the raw material sodium hydroxide can also be reduced; therefore, the method has the advantages of simple technological process; the reaction time is short; the product is easy to purify; raw material consumption is low; the reaction yield is high.
