Abstract
Tantalum good, titanium bad: This appears to be the case for silica- supported catalysts for the asymmetric epoxidation of allyl alcohols. Complexes such as [SiO-Ta(OEt)4] were prepared from silica and [Ta(=CHCMe3)(CH2CMe3)3], and in the presence of a tartrate and an alkyl hydroperoxide, these surface tantalum compounds lead to efficient and convenient catalysts for the asymmetric epoxidation of 2-propen-1-ol (R = H) and trans-2-hexen-1-ol (R = nPr; see reaction).
Original language | English (US) |
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Pages (from-to) | 3540-3542 |
Number of pages | 3 |
Journal | Angewandte Chemie - International Edition |
Volume | 38 |
Issue number | 23 |
DOIs | |
State | Published - Dec 3 1999 |
Externally published | Yes |
Keywords
- Asymmetric Catalysis
- Epoxidations
- Heterogeneous catalysis
- Surface chemistry
- Tantalum
ASJC Scopus subject areas
- Catalysis
- General Chemistry