摘要
A highly active Pd/TiO2 catalyst system was prepared and applied in the oxidative carbonylation of amines to ureas with ultra-low Pd content under organic ligand and solvent free conditions. The catalytic turnover frequencies (TOFs, moles of amines converted per mole of Pd per h) were 126000 and 250000 h-1 for the production of diphenylurea and dibenzylurea, respectively. An expanded substrate scope including the electron-rich and electron-deficient anilines, primary aliphatic amines, secondary amines was also established. This work offers a straightforward, step economic, and green methodology for the efficient synthesis of valuable ureas.
源语言 | 英语 |
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页(从-至) | 4040-4045 |
页数 | 6 |
期刊 | Green Chemistry |
卷 | 21 |
期 | 15 |
DOI | |
出版状态 | 已出版 - 2019 |
已对外发布 | 是 |