UCD

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Authors

Daly, AM; Dalton, CT; Renehan, MF; Gilheany, DG; ;

Year

1999

Month

April

Journal

Tetrahedron Letters

Title

Unsymmetrical salen ligands: Synthesis and use in chromium mediated asymmetric epoxidation

Status

Published

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Volume

Issue

Start Page

3617

End Page

3620

Abstract

Chiral non-racemic salen ligands with two different salicylidene moieties can be synthesised via trapping of the intermediate mono-salicylidene using (+)-O,O'-dibenzoyl-D-tartaric acid. The chromium complexes of these ligands can be used in asymmetric epoxidation of alkenes. The presence of triphenylphosphine oxide substantially raises the selectivity (ee) of the epoxidation. (C) 1999 Elsevier Science Ltd. All rights reserved..

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