6711-48-4Relevant articles and documents
Controllable synthesis of bis[3-(dimethylamino)propyl]amine over Cr and Co double-doped Cu/Γ-Al2O3
Lin, Chenhui,Li, Jiayi,Guo, Haotian,Wu, Xingchun,Wang, Bowei,Yan, Xilong
, p. 64 - 69 (2018)
The continuous synthesis of bis[3-(dimethylamino)propyl]amine (BPA) by hydrogenation of 3-(dimethylamino)-propionitrile (PN) in the presence of 3-(N,N-dimethylamino)propylamine (PA) over copper-based catalysts was investigated. It was found that Cu-Crsub
Synthesis method of tetramethyl diene triamine compound
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Paragraph 0015-0021, (2020/07/06)
The invention discloses a synthesis method of a tetramethyl diene triamine compound. The synthesis method comprises the following steps: taking palladium-rhodium graphene (Pd/Rh-CDG) as a catalyst, adding a raw material amine and a raw material nitrile into a reaction kettle, heating the reaction kettle to 90 DEG C in a hydrogen atmosphere under the pressure of 3-8MPa, stirring to react for 2-6 hours, cooling to normal temperature, centrifugally separating a catalyst and a reaction solution, and rectifying the reaction solution under reduced pressure to obtain the product tetramethyl diene triamine compound. The method has the beneficial effects that the catalyst has good compatibility with a reaction system, high activity and high selectivity, the catalyst is simply and thoroughly separated from the reaction system after the reaction is finished, and the catalyst is not obviously inactivated after being continuously used for 10 times. The process is simple, and the catalyst can be recycled. In the synthesis process of tetramethyl dipropylene triamine, the reactant conversion rate can reach 95% or above, and the selectivity of the product tetramethyl dipropylene triamine can reach90% or above.
Selective synthesis of N,N-bis(3-dimethylaminopropyl)amine over Pd/γ-Al2O3
Lin, Chenhui,Wang, Bowei,Guo, Haotian,Chen, Ligong,Yan, Xilong
, p. 391 - 396 (2018/02/21)
The synthesis of N,N-bis(3-dimethylaminopropyl)amine (BPA) from 3-(dimethylamino)-propionitrile (PN) and 3-(N,N-dimethylamino)propylamine (PA) over Pd/γ-Al2O3 in autoclaves was investigated. A series of Pd catalysts were prepared by different methods and characterized by XRD, TEM, and N2 adsorption–desorption. It was found that their activities were obviously affected by calcination temperature and reducing agent. Among them, the catalyst calcined at 500°C and reduced with NaBH4 exhibited the best performance in this reaction. It was possibly attributed to the better dispersion of palladium particles on γ-Al2O3. Furthermore, reaction parameters were also optimized. Under optimal conditions (PN/PA molar radio 1:1, toluene as solvent), BPA was obtained in 87.9% yield with 95.6% conversion over the above catalyst. Meanwhile, split of PN was observed. A probable mechanism of retro-Michael reaction was also proposed.
METHOD FOR PRODUCING BIS-[(3-DIMETHYLAMINO)PROPYL]AMINE (BISDMAPA)
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Page/Page column 3; 9, (2008/06/13)
The invention relates to a method for producing bis-[(3-dimethylamino)propyl]amine (bisDMAPA) by continuously reacting 3-(N,N-dimethylamino)propylamine (DMAPA) in the presence of a heterogeneous catalyst. The inventive method is characterized by carrying out the reaction in a reaction column.
METHOD FOR INCREASING THE SPACE-TIME YIELD IN A PROCESS USED FOR THE PRODUCTION OF A SYMMETRIC SECONDARY AMINE
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Page/Page column 13-15, (2008/06/13)
Disclosed is a method for increasing the space-time yield in a process that is used for producing a symmetric secondary amine by reacting a primary amine in the presence of hydrogen and a catalyst at a temperature ranging between 50 and 250 °C and an absolute pressure ranging from 5 to 350 bar. According to the inventive method, the absolute pressure is lowered while the temperature is maintained at the same level.
Low pressure process for manufacture of 3-dimethylaminopropylamine (DMAPA)
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Page 5-6, (2008/06/13)
An improved process for the production of 3-dimethylaminopropylamine in high purity from N,N-dimethylaminopropionitrile utilizing a low pressure hydrogenation process is described. The basic process comprises contacting the nitrile with hydrogen at low pressure in the presence of a catalyst under conditions sufficient to effect the conversion of the nitrile to the primary amine product.
Process for the preparation of a symmetrical secondary amine
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Page 8; 9, (2008/06/13)
Preparation of symmetrical secondary amine (I) comprises reacting a primary amine (II) in the presence of hydrogen over a catalyst (A) prepared by precipitation of catalytically active components (X) on monoclinic, tetragonal or cubic zirconium dioxide.
Preparation of a symmetrical secondary amine
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Page 6, (2010/02/09)
Process for preparing a symmetrical secondary amine by reaction of a primary amine in the presence of hydrogen and a catalyst whose preparation has involved precipitation of catalytically active components onto monoclinic, tetragonal or cubic zirconium dioxide.
Tetracyclic benzimidazole derivatives and combinatorial libraries thereof
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, (2008/06/13)
The present invention relates to novel tetracyclic benzimidazole derivative compounds of the following formula: wherein R1to R10have the meanings described in here. The invention further relates to combinatorial libraries containing two or more such compounds, as well as methods of preparing tetracyclic benzimidazole derivative compounds.
Preparation of secondary amines from nitriles
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, (2008/06/13)
Secondary amines of the formula (II) (X—CH2—)2NH??(II) where X is a C1-20-alkyl, C2-20-alkenyl or C3-8-cycloalkyl group which may be unsubstituted or substituted by C1-20-alkyl, C3-8-cycloalkyl, C4-20-alkylcycloalkyl, C4-20-cycloalkylalkyl, C2-20-alkoxyalkyl, C6-14-aryl, C7-20-alkylaryl, C7-20-aralkyl, C1-20-alkoxy, hydroxy, C1-20-hydroxyalkyl, amino, C1-20-alkylamino, C2-20-dialkylamino, C2-12-alkenylamino, C3-8-cycloalkylamino, arylamino, diarylamino, aryl-C1-8-alkylamino, halogen, mercapto, C2-20-alkenyloxy, C3-8-cycloalkoxy, aryloxy and/or C2-8-alkoxycarbonyl, are prepared by reacting nitriles of the formula (III) X—CN??(III) with hydrogen at from 20 to 250° C. and pressures of from 60 to 350 bar in the presence of an Rh-containing catalyst comprising from 0.1 to 5% by weight, based on the total weight of the catalyst, of Rh on a support to give mixtures of primary amines of the formula (I) X—CH2—NH2??(I) and secondary amines of the formula (II) (X—CH2—)2NH??(II) and returning at least part of the primary amines separated from the mixtures obtained to the reaction.