Asymmetric epoxidation of styrenes catalyzed by molybdenum complexes with amino alcohol ligands
โ Scribed by Yi Wang; Zhiqing Wu; Zhengkai Li; Xiang-Ge Zhou
- Publisher
- Elsevier Science
- Year
- 2009
- Tongue
- French
- Weight
- 517 KB
- Volume
- 50
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
โฆ Synopsis
Two common amino alcohols, prolinol and isolucinol, and their derivatives have been screened to coordinate with MoO 2 (acac) 2 to form in situ catalysts for asymmetric epoxidation of styrenes with the highest enantioselectivity of 84% for 4-fluoro-styrene under the optimized reaction conditions.
๐ SIMILAR VOLUMES
Vanadium catalysts bearing (+)-ketopinic acid-based chiral hydroxamic acids as constituent ligands are investigated in the asymmetric epoxidation of allylic alcohols. Chiral ligands lacking an N-substituent and those having a bulkier aryl group in the bornane skeleton provided better selectivity.