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Asymmetric epoxidation of styrenes catalyzed by molybdenum complexes with amino alcohol ligands

โœ 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

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โœฆ 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.


๐Ÿ“œ SIMILAR VOLUMES


Asymmetric epoxidation of allylic alcoho
โœ Hsyueh-Liang Wu; Biing-Jiun Uang ๐Ÿ“‚ Article ๐Ÿ“… 2002 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 256 KB

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.