Article ID Journal Published Year Pages File Type
60942 Journal of Catalysis 2014 7 Pages PDF
Abstract

•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.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (108 K)Download as PowerPoint slide

Related Topics
Physical Sciences and Engineering Chemical Engineering Catalysis
Authors
, , , , , ,