Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
60942 | Journal of Catalysis | 2014 | 7 Pages |
•Novel chiral periodic mesoporous phenylene–silica is synthesized.•High density of bis(oxazoline) moieties and surface area.•Co-condensation with 1,4-bis(triethoxysilyl)benzene leads to porous material.•Effective heterogeneous asymmetric catalyst in the benzoylation of 1,2-diol.•Reusable for five cycles without loss of catalytic activity or enantioselectivity.
We describe the preparation of an effective and reusable heterogeneous asymmetric catalyst. A novel chiral periodic mesoporous phenylene–silica containing high density of bis(oxazoline) moieties is prepared by co-condensation method with 1,4-bis(triethoxysilyl)benzene. After copper(II) coordination, the material is extremely efficient on the kinetic resolution of the 1,2-diphenylethane-1,2-diol with persistent high enantioselectivities (91 - > 99%) and yields (46–43% in maximum 50% resolution) at least for five consecutive cycles. Characterization of the material after the catalytic experiments showed that the heterogeneous catalyst was very robust keeping the integrity of the structure.
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