Highly Selective Enamination of β‐ketoesters Catalyzed by Interlocked [Cu 8 ] and [Cu 18 ] Nanocages
| Autor: | Wan-Zhen Qiao, Peng Cheng, Bin Zhao, Tianqun Song |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
010405 organic chemistry Cationic polymerization General Medicine General Chemistry 010402 general chemistry Highly selective Heterogeneous catalysis Combinatorial chemistry 01 natural sciences Catalysis 0104 chemical sciences chemistry.chemical_compound Nanocages Aniline chemistry Size selectivity Ethyl acetoacetate Polymer chemistry Metal-organic framework |
| Zdroj: | Angewandte Chemie International Edition. 58:13302-13307 |
| ISSN: | 1521-3773 1433-7851 |
| DOI: | 10.1002/anie.201906306 |
| Popis: | Interlocking cages are of great interest due to their fascinating structures and potential applications. However, the interlocking of different cages has not been previously reported. Herein, quadruply interlocked [Cu8 ] and [Cu18 ] nanocages have been constructed and structurally characterized in cationic metal-organic framework {[CuI Cu4II (XN)4 (PTA)4 (H2 O)4 ]0.5 SO4 ⋅5 H2 O⋅EtOH}n (1). 1 can trap the anionic pollutant CrO42- and the radioactive-contaminant simulant ReO4- with an uptake capacity of 83.2 and 218 mg g-1 , respectively. Catalytic investigations reveal 1 is an efficient heterogeneous catalyst for the enamination of ethyl acetoacetate with aniline and the turnover frequency (TOF) can reach a record value of 4000 h-1 . More importantly, 1 represents the first of a catalyst of enamination to exhibit excellent size selectivity on different substrates. The robust catalyst can be reused at least ten times without obvious loss in catalytic activity. |
| Databáze: | OpenAIRE |
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