Donor-Flexible Bis(pyridylidene amide) Ligands for Highly Efficient Ruthenium-Catalyzed Olefin Oxidation
| Autor: | Kevin Salzmann, Candela Segarra, Martin Albrecht |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Olefin fiber
010405 organic chemistry Ligand chemistry.chemical_element Homogeneous catalysis General Medicine General Chemistry 010402 general chemistry 01 natural sciences Combinatorial chemistry Catalysis 0104 chemical sciences Ruthenium Redox Activity chemistry.chemical_compound chemistry Amide 540 Chemistry Oxidative cleavage |
| Zdroj: | Angewandte Chemie (International ed. in English). 59(23) |
| ISSN: | 1521-3773 |
| Popis: | An exceptionally efficient ruthenium-based catalyst for olefin oxidation has been designed by exploiting N,N'-bis(pyridylidene)oxalamide (bisPYA) as a donor-flexible ligand. The dynamic donor ability of the bisPYA ligand, imparted by variable zwitterionic and neutral resonance structure contributions, paired with the redox activity of ruthenium provided catalytic activity for Lemieux-Johnson-type oxidative cleavage of olefins to efficiently prepare ketones and aldehydes. The ruthenium bisPYA complex significantly outperforms state-of-the-art systems and displays extraordinary catalytic activity in this oxidation, reaching turnover frequencies of 650 000 h-1 and turnover numbers of several millions. |
| Databáze: | OpenAIRE |
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