Tetrahedron letters

Chromium catalysed asymmetric alkene epoxidation. greater selectivity for an E-alkene versus its Z-isomer

C Bousquet, DG Gilheany

文献索引：Bousquet, Claudine; Gilheany, Declan G. Tetrahedron Letters, 1995 , vol. 36, # 42 p. 7739 - 7742

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被引用次数: 80

摘要

E-β-methylstyrene can be asymmetrically epoxidised stoichiometrically with up to 83% ee and catalytically with up to 77% ee by chiral chromium complexes in the presence of phosphine oxides, DMSO or DMF. In all cases the analogous reaction with Z-β- methylstyrene gives lower ee.