535-87-5Relevant articles and documents
Synthesis of CoFe2O4@Pd/Activated carbon nanocomposite as a recoverable catalyst for the reduction of nitroarenes in water
Hamadi, Hosein,Kazeminezhad, Iraj,Mohammadian, Sara
, (2021/07/06)
Efficient reduction of nitro compounds into amines is an important industrial transformation. So, it is a great deal to design new catalysts for efficient reduction of the nitro compounds especially in water. In this work, a new magnetic Pd/activated carbon nanocomposite (CoFe2O4@Pd/AC) was synthesized via metal-impregnation-pyrolysis method. The CoFe2O4@Pd/AC was fully characterized by FT-IR, PXRD, FESEM, TEM, VSM, EDX-mapping and BET techniques. The results showed that CoFe2O4@Pd/AC is a highly reactive and easily recoverable magnetic catalyst for the reduction of the nitro compounds by using NaBH4 in water. For instance, aniline was obtained in high yield (99%) after 75 ?min at 25 ?C by using just 6 ?mg of the catalyst. In addition, CoFe2O4@Pd/AC was recovered by a simple magnetic decantation and it exhibits stable activity and remains intact during the catalytic process with no significant loss in activity (8 cycles).
A polyamine dendritic polymer-copper complex: A reusable catalyst for the additive-free amination of aryl bromides, and iodides
Avudaiappan,Palmurukan,Unnikrishnan,Sreekumar
, p. 1477 - 1484 (2020/02/05)
A porphyrin-initiated amine-functionalized polyepichlorohydrin dendritic polymer (PPECH-Amine) was effectively synthesized, and its water-soluble copper complex (PPECH-Amine-Cu) was developed by treating it with copper acetate. PPECH-Amine and PPECH-Amine-Cu were characterised by different spectroscopic and microscopic techniques. PPECH-Amine-Cu was identified as a reusable catalyst for the amination of bromo- and iodo-benzene derivatives in aqueous media. Due to the presence of residual amino groups in the PPECH-Amine-Cu catalyst, the protocol does not need any additional base additive, as ammonia itself acts as a base and a coupling partner. Due to the good water-soluble nature of this catalyst, it can be easily separated and reused up to six reaction cycles without any loss in its activity.
Preparation method of 3,5-diaminobenzoic acid
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Paragraph 0025; 0026; 0031; 0036; 0040; 0045; 0053, (2018/02/04)
The invention discloses a preparation method of 3,5-diaminobenzoic acid. The preparation method comprises steps as follows: m-dinitrobenzoic acid and hydrogen are subjected to a reduction reaction in a solvent under the action of a hydrogenation catalyst, and after the reaction, 3,5-diaminobenzoic acid is obtained through treatment, wherein the hydrogenation catalyst is an Ni-M-Al three-way catalyst, and M is La, Yb or Ce. According to the preparation method of 3,5-diaminobenzoic acid, the new three-way catalyst is adopted as the hydrogenation catalyst, the pressure of hydrogenation is effectively reduced, meanwhile, the usage quantity of the catalyst is reduced, and accordingly, 3,5-diaminobenzoic acid prepared through catalytic hydrogenation has higher industrial application value.