- Preparation of nitrogen-doped carbon supported cobalt catalysts and its application in the reductive amination
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The use of non-noble metal catalysts with high activity is of great importance for organic transformations. Herein, nitrogen-doped carbon supported cobalt catalysts with high surface area up to 981.2 m2/g were prepared via the simple pyrolysis of cobalt coordinated organic polymers with silica as the hard template. The pyrolysis temperature showed a great effect on the structure and properties of the as-prepared catalysts. The Co@NC-800 catalyst with the pyrolysis temperature of 800 °C demonstrated a high activity for the selective reductive amination of carbonyl compounds to primary amines with ammonia and hydrogen. Structurally-diverse primary amines with yields in the range from 81.8% to 100% were attained under the optimal conditions. The Co@NC-800 catalyst could be reused without the loss of its activity. The Co@NC-800 catalyst demonstrated comparable activity as the reported heterogeneous noble metal catalysts.
- Yuan, Ziliang,Liu, Bing,Zhou, Peng,Zhang, Zehui,Chi, Quan
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p. 347 - 356
(2019/01/24)
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- Colloid and nanosized catalysts in organic synthesis: XVII. Reductive amination of carbonitriles in the presence of supported nickel nanoparticles
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Reductive amination of carbonitriles catalyzed by nickel nanoparticles applied onto a solid support in a plug flow reactor in the gas phase or the gas–liquid–solid catalyst system occurs at atmospheric pressure of hydrogen affording the nonsymmetrical secondary or tertiary amines. The effect of the support type on the target product yield and conversion of the substrate has been studied.
- Popov, Yu. V.,Mokhov,Latyshova,Panov,Shirkhanyan
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p. 2546 - 2551
(2017/12/26)
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- Continuous Production of Dialkylamines by Selective Hydrogenation of Nitriles on a Nickel-Zeolite Catalyst
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Hydrogenation of aliphatic nitriles in the presence of nickel supported by NaX zeolite was studied. The data obtained were used to develop a continuous method for obtaining dialkylamines with the yield of the target product of up to 98%.
- Popov, Yu. V.,Mokhov,Latyshova,Panov,Pletneva, M. Yu.
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p. 1778 - 1782
(2018/03/21)
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- Colloid and nanosized catalysts in organic synthesis: XVI.1 Continuous hydrogenation of carbonitriles catalyzed by nickel nanoparticles applied on a support
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Conversion of the starting nitriles and selectivity of the products formation during continuous hydrogenation of various nitriles catalyzed by Ni0/Ceokar-2 have been studied as functions of temperature. Performing the process at temperature 120–260°С has led to the formation of a mixture of products containing di- and trialkylamines as well as the corresponding imines and enamines.
- Popov, Yu. V.,Mokhov,Latyshova,Nebykov,Panov,Pletneva, M. Yu.
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p. 2276 - 2281
(2017/11/24)
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- Selective Hydrogenation of Nitriles to Secondary Imines Catalyzed by an Iron Pincer Complex
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Selective hydrogenation of nitriles to secondary imines catalyzed by an iron complex, the pincer complex (iPr-PNP)Fe(H)Br(CO), in the presence of catalytic base, is reported. A wide range of (hetero)aromatic and aliphatic nitriles are hydrogenated to the corresponding secondary imines under mild conditions.
- Chakraborty, Subrata,Milstein, David
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p. 3968 - 3972
(2017/06/19)
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- Colloid and nanosized catalysts in organic synthesis: XIV. Reductive amination and amidation of carbonitriles catalyzed by nickel nanoparticles
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Hydrogenation of carbonitriles catalyzed by nickel nanoparticles in the presence of primary amines led to the predominant formation of unsymmetrical secondary amines. In the presence of secondary amines hydrogenation of nitrites provided enamines as main products. Hydrogenation of nitriles in the presence of formamide or acetamide afforded formyl or acetyl derivatives of primary amines.
- Popov, Yu. V.,Mokhov,Shcherbakova
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p. 798 - 805
(2016/06/13)
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- Highly efficient aerobic oxidation of various amines using Pd3Pb intermetallic compounds as catalysts
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Intermetallic Pd3Pb supported on Al2O3 can act as a highly efficient heterogeneous catalyst for the oxidation of various amines including primary, secondary, aromatic, aliphatic, and cyclic amines. The Royal Society of Chemistry 2014.
- Furukawa, Shinya,Suga, Akifusa,Komatsu, Takayuki
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p. 3277 - 3280
(2014/03/21)
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- Acceptorless photocatalytic dehydrogenation for alcohol decarbonylation and imine synthesis
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It has come to light: Renewed interest in conversions of highly oxygenated materials has motivated studies of the organometallic-catalyzed photocatalytic dehydrogenative decarbonylation of primary alcohols into alkanes, CO, and H2 (see scheme). Methanol, ethanol, benzyl alcohol, and cyclohexanemethanol are readily decarbonylated. The photocatalysts are also active for amine dehydrogenation to give N-alkyl aldimines and H2.
- Ho, Hung-An,Manna, Kuntal,Sadow, Aaron D.
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supporting information; experimental part
p. 8607 - 8610
(2012/09/11)
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- Oxidation of amines over alumina based catalysts
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Amines were oxidized by molecular oxygen in the vapor phase at atmospheric pressure over alumina and silicotungstic acid/alumina catalysts. The study is focused on the influence of structure of amine and catalyst properties on the composition of the main reaction products and byproducts. Coating of γ-Al2O3 with silicotungstic acid or its semisalt can significantly enhance its catalytic activity in amine oxidation. The adsorption of amine on weak acidic sites of catalyst is essential for its oxidation to main reaction products. Cycloalkylamines are oxidized mainly to cyclic oximes (selectivity up to 64%) and Schiff bases of appropriate cycloalkanone and cycloalkylamine (selectivity up to 38%). Mainly nitriles (selectivity up to 55%) and appropriate Schiff bases (selectivity up to 54%) were observed in the oxidation products of primary alkylamines. Their molar ratio depends on the catalyst acidity and reaction conditions. 1,6-Hexanediamine is oxidized mainly to caprolactam (yield 48%) and other cyclic lactames and Schiff bases as well as to dinitrile (yield 13%).
- Rakottyay, Karol,Kaszonyi, Alexander,Vají?ek, Stanislav
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experimental part
p. 33 - 41
(2010/08/22)
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- Amino acid esters and amides for reductive amination of mucochloric acid: Synthesis of novel γ-lactams, short peptides and antiseizure agent Levetiracetam (Keppra)
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A simple methodology utilizing mucochloric acid and different α- and β-amino acid esters, amides and short peptides for the synthesis of novel γ-lactam and γ-lactam-based short peptides was developed. The synthesis of an antiseizure agent, Levetiracetam (Keppra) was demonstrated. Wiley-VCH Verlag GmbH & Co. KGaA, 2006.
- Das Sarma, Koushik,Zhang, Ji,Huang, Yun,Davidson, James G.
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p. 3730 - 3737
(2007/10/03)
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- Microwave-assisted direct transformation of amines to ketones using water as an oxygen source
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Retro-reductive animations, direct transformations of amines to ketones, were catalyzed by Pd/C in water under microwave irradiation. The Royal Society of Chemistry 2005.
- Miyazawa, Akira,Tanaka, Kan,Sakakura, Toshiyasu,Tashiro, Masashi,Tashiro, Hideki,Surya Prakash,Olah, George A.
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p. 2104 - 2106
(2007/10/03)
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