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

被引：65

作者：

Daly, AM ^{[1
]}

Dalton, CT ^{[1
]}

Renehan, MF ^{[1
]}

Gilheany, DG ^{[1
]}

机构：

[1] Natl Univ Ireland Univ Coll Dublin, Dept Chem, Dublin 4, Ireland

来源：

TETRAHEDRON LETTERS | 1999年 / 40卷 / 18期

关键词：

D O I：

10.1016/S0040-4039(99)00489-X

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

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.

引用

页码：3617 / 3620

页数：4

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