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Enantioselective epoxidation of 2,2-dimethyl-2H-chromenes by dimethyldioxirane and jacobsen's Mn(III)salen catalysts

✍ Scribed by Waldemar Adam; József Jekő; Albert Lévai; Csaba Nemes; Tamás Patonay; Péter Sebők

Publisher
Elsevier Science
Year
1995
Tongue
French
Weight
233 KB
Volume
36
Category
Article
ISSN
0040-4039

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Determination of the absolute configuration of optically active 2,2-dimethyl-3,4-epoxychromans prepared by the catalytic enantioselective epoxidation with the dimethyldioxirane/Jacobsen Mn(III)salen system
✍ Waldemar Adam; József Jekö; Albert Lévai; Zsuzsa Majer; Csaba Nemes; Tamás Paton 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 531 KB

Enantioselective epoxidation of 2,2-dimethyl-2/-/-chromenes la-d by using Mn(III)salen complexes (R,R)-3 and (S,S)-3 as catalysts and dimethyldioxirane (DMD) as oxygen donor afforded optically active 2,2-dimethyi-3,4-epoxychromans 2a-d in good yields and high enantioselectivities (up to 93% e.e.). T