Application of nanocarbon-supported single-atom palladium-based catalysts in the catalytic hydrogenation of nitrile compounds to prepare secondary amines

Abstract

The invention discloses the application of a nano-carbon-supported single-atom palladium-based catalyst in the catalytic hydrogenation of nitrile compounds to prepare secondary amines, and belongs to the technical field of catalysts for catalytic hydrogenation of liquid-phase nitrile compounds. The monoatomically dispersed palladium-based catalyst can generate corresponding secondary amine compounds with high selectivity under mild conditions; the catalytic reaction conditions are: reaction temperature 45-90°C, hydrogen source is ammonia borane. In the catalyst of the present invention, the metal exists in a dispersed state of single atoms, which more effectively improves the utilization efficiency of the metal, so that the activity and selectivity of hydrogenation of nitrile compounds are obviously improved. Moreover, the atomically dispersed catalyst is easy to prepare and low in cost, and has good application prospects in the hydrogenation of nitrile compounds to prepare secondary amines.

Description

technical field [0001] The invention relates to the technical field of application catalysts for catalytic hydrogenation of liquid-phase nitrile compounds, in particular to the application of a nano-carbon-supported single-atom palladium-based catalyst in the preparation of secondary amines by catalytic hydrogenation of nitrile compounds. Background technique [0002] Secondary amines are an important compound in organic chemistry. There are examples of such compounds in natural products, bioactive molecules and industrial materials, and they have a very wide range of applications. There are many ways to synthesize secondary amines, but none of them are easy. Common methods include direct alkylation of primary amines, reductive amination, and hydrogenation of nitrile compounds; among them, catalytic hydrogenation of nitrile compounds has high atom utilization efficiency, and the reaction is more ecologically and economically advantageous, so Its development has attracted mu...

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Problems solved by technology

[0003] In the catalytic hydrogenation of nitrile compounds, a mixture of several products such as primary amines, secondary amines, and tertiary amines is often produced, and the selectivity for one product is relatively low. Therefore, using a suitable catalyst, one of them can be generated with high selectivity The product is very necessary; due to the problem of the reaction selectivity, it is mainly a catalyst for the hydrogenation of nitrile compounds to obtain primary amines at present, and there is little research on the catalyst for the hydrogenation of nitrile compounds to obtain secondary amines. Catalytic hydrogenation to synthesize secondary amines, the research on its catalyst is very necessary and critical

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