The catalytic activity of new chiral salen complexes immobilized on MCM-41 by multi-step grafting in the asymmetric epoxidation

✍ Scribed by Geon-Joong Kim; Ji-Hoon Shin

• Publisher: Elsevier Science
• Year: 1999
• Tongue: French
• Weight: 278 KB
• Volume: 40
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(99)01407-0

✦ Synopsis

The chiral salen Mn(III) complexes were heterogenized on the siliceous MCM-41 by a new grafting method using (3-aminopropyl) trimethoxysilane and 2,6-diformyl-4-tert-butylphenol. The immobilized chiral salen Mn(III) complexes were stable during the reaction and exhibited a relatively high enantioselectivity for epoxidation of styrene and ot-methylstyrene.