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ChemInform Abstract: Asymmetric Steering of Oxa Diels—Alder Reactions with Silyloxydienes Employing Proline Esters as Chiral Auxiliary Groups.

✍ Scribed by Edwin Blaeser; Patrik Kolar; Dieter Fenske; Hellmut Goesmann; Herbert Waldmann


Publisher
John Wiley and Sons
Year
2010
Weight
37 KB
Volume
30
Category
Article
ISSN
0931-7597

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Asymmetric Steering of Oxa Diels–Alder R
✍ Edwin Bläser; Patrik Kolar; Dieter Fenske; Hellmut Goesmann; Herbert Waldmann 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 171 KB 👁 2 views

Chiral aldehydes 4a,b, obtained by the ozonolysis of the dihydro-γ-pyrones 13 with very high diastereomeric ratios (up to 99:1). The absolute configuration of the predominating corresponding N,NЈ-fumaroylbis[(S)-proline esters] 3 react in the presence of lanthanoid chelate complexes Eu(fod) 3 or dia