Enantioselective epoxidation of unfunctionalized olefins catalyzed by chiral salen Mn(III) catalyst immobilized on zirconium oligostyrenylphosphonate-phosphate
✍ Scribed by Wenshan Ren; Xiangkai Fu; Hebin Bao; Ruofei Bai; Pingping Ding; Binglin Sui
- Book ID
- 118426904
- Publisher
- Elsevier Science
- Year
- 2009
- Tongue
- English
- Weight
- 489 KB
- Volume
- 10
- Category
- Article
- ISSN
- 1566-7367
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📜 SIMILAR VOLUMES
## Abstract Chiral Jacobsen’s catalyst was axially immobilized onto phenoxy‐modified zirconium poly(styrene‐phenylvinylphosphonate)phosphate (ZPS‐PVPA). The immobilized catalysts show comparable __ee__ values for asymmetric epoxidation of styrene and much higher __ee__ values for α‐methylstyrene (7
Two novel chiral poly-salen-Mn(III) complexes 1 and 2, derived from (R,R)-1,2-diaminocyclohexane and the disalicylaldehydes 5 and 6 were synthesized and employed in the enantioselective epoxidation of olefins. A range of 30-92% ee and 75-97% yield was achieved in NaClO/4-PPNO and m-CPBA/NMO oxidant