Boosting catalytic activity of δ-MnO2 through potassium incorporation for efficient carbonylation of amines by carbon dioxide was written by Sun, Dalei;Peng, Liang;Yang, Yating;Fang, Yanxiong;Ping Jiang, San;Shao, Zongping. And the article was included in Journal of Catalysis in 2022.Recommanded Product: 2387-23-7 This article mentions the following:
The synthesis of N,N’-dialkylurea from carbonylation of amines with CO2 over δ-MnO2 catalyst is a highly attractive green route, however, the catalytic performance of δ-MnO2 is still far from satisfied. Here, we report a new strategy for fine tuning the physicochem. properties of δ-MnO2 through KOH hydrothermal activation, resulting in superior catalytic performance with N,N’-dialkylurea yield as high as 77.09% using NMP as solvent at 160°C for 4 h, as compared to only 43.41% for the pristine δ-MnO2. The yield is further boosted to 92.02% by using PEG 400 as solvent. Systematic anal. based on characterization techniques reveals such superior catalytic performance is closely related to, on the one hand, the potassium-incorporation and catalysis induced modification of the concentration of vacancies of both oxygen and Mn, on the other hand, PEG 400 as solvent is favorable to both absorbance of CO2 and stability of carbamic acids intermediates. In the experiment, the researchers used many compounds, for example, 1,3-Dicyclohexylurea (cas: 2387-23-7Recommanded Product: 2387-23-7).
1,3-Dicyclohexylurea (cas: 2387-23-7) belongs to amides. Amides include many other important biological compounds, as well as many drugs like paracetamol, penicillin and LSD. Low-molecular-weight amides, such as dimethylformamide, are common solvents. Ionic, or saltlike, amides are strongly alkaline compounds ordinarily made by treating ammonia, an amine, or a covalent amide with a reactive metal such as sodium.Recommanded Product: 2387-23-7
Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics