authors |
Lourenco, MAO; Carneiro, L; Mayoral, A; Diaz, I; Silva, AR; Ferreira, P |
nationality |
International |
journal |
JOURNAL OF CATALYSIS |
author keywords |
Heterogeneous catalysis; Asymmetric catalysis; Homogeneous catalysis; Periodic mesoporous organosilicas; Co-condensation |
keywords |
ENANTIOSELECTIVE CATALYSIS; KINETIC RESOLUTION; CARBON REPLICAS; ORGANOSILICA; COMPLEXES; LIGANDS; SUPPORT; CYCLOPROPANATION; IMMOBILIZATION; BISOXAZOLINES |
abstract |
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. (C) 2014 Elsevier Inc. All rights reserved. |
publisher |
ACADEMIC PRESS INC ELSEVIER SCIENCE |
issn |
0021-9517 |
year published |
2014 |
volume |
320 |
beginning page |
63 |
ending page |
69 |
digital object identifier (doi) |
10.1016/j.jcat.2014.09.017 |
web of science category |
Chemistry, Physical; Engineering, Chemical |
subject category |
Chemistry; Engineering |
unique article identifier |
WOS:000347134100008
|