Abstract
(Salen)Mn(III) catalysts show increased turnover numbers in the catalytic asymmetric epoxidation of conjugated olefins upon addition of bulky Lewis acids (LA) such as zinc tetraphenylporphyrin (ZnTPP). Up to 3-fold increase in total catalytic activity and at least a 20-fold increase in catalyst stability was observed with a (salen)Mn catalyst bearing pendant 5,5′-bis-pyridyl groups. This latter enhancement is primarily attributed to formation of a coordination triad, which provides steric protection for the catalyst from bimolecular decomposition. Supramolecular complex formation enhanced the catalyst's stability without compromising its enantioselectivity.
| Original language | English |
|---|---|
| Pages (from-to) | 15-20 |
| Number of pages | 6 |
| Journal | Journal of Molecular Catalysis A: Chemical |
| Volume | 174 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - Oct 1 2001 |
Keywords
- Asymmetric epoxidation
- Catalytic epoxidation
- Manganese
- Salen
- Supramolecular chemistry
ASJC Scopus subject areas
- Catalysis
- Process Chemistry and Technology
- Physical and Theoretical Chemistry
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Cite this
Morris, G. A., Nguyen, S. B. T., & Hupp, J. T. (2001). Enhanced activity of enantioselective (salen)Mn(III) epoxidation catalysts through supramolecular complexation. Journal of Molecular Catalysis A: Chemical, 174(1-2), 15-20. https://doi.org/10.1016/S1381-1169(01)00165-0