Abstract

The purely siliceous MCM-41 and Ti-containing MCM-41 were synthesized by the solvent evaporation method. The chiral salens were immobilized step by step on the siliceous MCM-41 by the new grafting method using 3-aminopropyltrimethoxysilane and 2,6-diformyl-4-tert-butylphenol. The enantioselective diols could be synthesized directly from olefins using the hybrid catalysts of chiral salen complexes and Ti-MCM-41.

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