Abstract

CUBILLOS, Jairo  and  HOLDERICH, Wolfgang. Jacobsen’s catalyst anchored on Al-MCM-41 and NH2 group modified Si-MCM-41 as heterogeneous enantioselective epoxidation catalyst using in situ generated dimethyldioxirane as oxidant. Rev.fac.ing.univ. Antioquia [online]. 2007, n.41, pp.31-47. ISSN 0120-6230.

The enantioselective epoxidation of three prochiral olefins over Jacobsen’s catalyst immobilized on Al-MCM-41 and NH₂-Si-MCM-41 in the presence of in situ generated DMD as the oxygen source was investigated. Experimental results indicate that the catalyst did not significantly suffer any change in its chemical structure. Therefore, the reusability of catalyst could be successfully achieved when it was immobilized by chemical bonding of the salen ligand.

Keywords : Enantioselective epoxidation; Jacobsen’s catalyst; Immobilized catalyst; in situ generated DMD; catalyst degradation; recyclability.

        · abstract in Spanish     · text in English     · English ( pdf )