CATALYTIC AND ASYMMETRIC EPOXIDATION OF UNFUNCTIONALIZED ALKENES WITH HYDROGEN-PEROXIDE AND (SALEN)MN(III) COMPLEXES

被引：90

作者：

PIETIKAINEN, P

机构：

[1] Department of Chemistry, University of Helsinki, FIN-00014

来源：

TETRAHEDRON LETTERS | 1994年 / 35卷 / 06期

关键词：

D O I：

10.1016/S0040-4039(00)76006-0

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Catalytic epoxidation of two unfunctionalized alkenes, 1,2-dihydronaphthalene and trans-beta-methylstyrene, is reported using achiral and chiral (Salen)Mn(III) complexes 1-3 together with a nitrogen heterocycle as axial ligand in the presence of 30% aqueous hydrogen peroxide as oxidant. Typically, the reaction system consisted of the substrate, oxidant, ligand, and salen in a ratio of 1:2-3.5:0.4:0.025-0.05. The best ligands were imidazole and N-methyl imidazole. The highest ee-values obtained were 60% for 1,2-dihydronaphthalene oxide and 47% for trans-beta-methylstyrene oxide.

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页码：941 / 944

页数：4

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