15520-10-2Relevant articles and documents
Method for preparing 2-methyl pentamethylene diamine
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Paragraph 0070-0074, (2021/09/22)
The invention provides a brand-new method for preparing 2-methyl pentamethylene diamine. Ni-Al hydrotalcite loaded Ir is used as a catalyst, a fixed bed is used as a reactor, ammonium formate is used as a hydrogen source and an ammonia source for reaction, and acetaldehyde and methacrylonitrile are converted into 2-methyl pentamethylene diamine by a one-pot method in the presence of a solvent and under a certain temperature condition. The method for preparing the 2-methyl pentamethylene diamine provided by the invention has the advantages of mild reaction conditions, simple operation process, far higher selectivity of the target product than that of the traditional preparation method, less three wastes and easy product separation, and can realize continuous production, and has an industrial application potential; and meanwhile, the used catalyst is simple in preparation process.
Stable and Inert Cobalt Catalysts for Highly Selective and Practical Hydrogenation of C≡N and C=O Bonds
Chen, Feng,Topf, Christoph,Radnik, J?rg,Kreyenschulte, Carsten,Lund, Henrik,Schneider, Matthias,Surkus, Annette-Enrica,He, Lin,Junge, Kathrin,Beller, Matthias
supporting information, p. 8781 - 8788 (2016/08/02)
Novel heterogeneous cobalt-based catalysts have been prepared by pyrolysis of cobalt complexes with nitrogen ligands on different inorganic supports. The activity and selectivity of the resulting materials in the hydrogenation of nitriles and carbonyl compounds is strongly influenced by the modification of the support and the nitrogen-containing ligand. The optimal catalyst system ([Co(OAc)2/Phenα-Al2O3]-800 = Cat. E) allows for efficient reduction of both aromatic and aliphatic nitriles including industrially relevant dinitriles to primary amines under mild conditions. The generality and practicability of this system is further demonstrated in the hydrogenation of diverse aliphatic, aromatic, and heterocyclic ketones as well as aldehydes, which are readily reduced to the corresponding alcohols.
PREPARATION OF METHYLPENTAMETHYLENEDIAMINE AND METHYLPIPERIDINE
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Page/Page column 2, (2011/02/26)
Methyl-2-pentamethylenediamine and methyl-3-piperidine are prepared by hydrogenation of methylglutaronitrile in the presence of a catalyst including cobalt, chromium, and nickel, especially a catalyst based on Raney cobalt doped with nickel and chromium.
