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CHEMICAL RESEARCH IN CHINESE UNIVERSITIES · 2019 ·Vol. 35 ·期 3 ·457-462 · IF 1.071

Reductive Amination of Carbonyl Compounds with Ammonia and Hydrogenation of Nitriles to Primary Amines with Heterogeneous Cobalt Catalysts

Liu Junmei,Guo Wanwan,Sun Hao,Li Ruyue,Feng Zhipeng,Zhou Xuyang,Huang Jun

Reductive amination of aldehydes/ketones with aqueous NH 3 and hydrogenation of nitriles to primary amines with Co catalysts were reported. Co@NC-700 exhibited remarkable activity and high selectivity for the reductive amination of aldehydes/ketones with aqueous NH 3 and the hydrogenation of nitriles to primary amines. Several primary amines can be obtained with good to excellent yields via the reductive amination of aldehydes/ketones and the hydrogenation of nitriles. The nitrogen-doped carbon(C)-supported Co@NC-700 metal catalyst was prepared via the pyrolysis of bioMOF Co/adenine in activated C. Co@NC-700 can be reused five times without evident loss of activity.

研究领域: 有机化学 · 催化化学

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JOURNAL OF COLLOID AND INTERFACE SCIENCE · 2024 · IF 9.4

Regulating the production distribution in Ni-Cu nanoparticle mediated nitrile hydrogenation

Zihan Lv,Zeng Hong,Da Ke,Chao Qian,Xinzhi Chen,Shaodong Zhou

The selective hydrogenation of nitrile compounds represents a pivotal area of research within both industrial and academic catalysis. In this study, we prepared Ni-Cu bimetallic catalysts through a co-deposition-crystallization sequence, aimed at the efficient production of primary and secondary amines. The enhanced selectivity for primary amines is attributed to the downshift of the d-band center of Ni 0.1 Cu, which weakens the adsorption of key imine intermediates. Consequently, the synthesized Ni-Cu catalysts demonstrated exceptional catalytic performance in the selective hydrogenation of nitrile compounds, including those with reduction-sensitive functional groups such as −Cl and −Br, achieving 100 % conversion efficiency and significant yields ranging from 80 % to 99 %. The reaction conditions were comprehensively optimized, taking into account factors such as temperature, solvent, time, additives, and hydrogen pressure. Furthermore, the catalytic performance of Ni 0.1 Cu and Ni 0.4 Cu in the selective hydrogenation of nitriles was sustained over at least five reaction cycles. Temperature-programmed desorption results elucidated the structure–activity relationship, revealing that a strong interaction site prevails in Ni 0.4 Cu, while a weaker or moderate interaction site in Ni 0.1 Cu is responsible for the formation of primary amines. Theoretical calculations indicate that the reaction proceeds via an imine mechanism, with benzylideneimine serving as a key intermediate. This work may stimulate further research into the development of bimetallic nano-catalysts for selective nitrile hydrogenation in industrial catalytic processes.

CAS / MDL: 110-82-7 67-63-0 16940-66-2 67-56-1

研究领域: 催化化学 · 材料科学 · 工业化学

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Reductive Amination of Carbonyl Compounds with Ammonia and Hydrogenation of Nitriles to Primary Amines with Heterogeneous Cobalt Catalysts

Regulating the production distribution in Ni-Cu nanoparticle mediated nitrile hydrogenation