✦ LIBER ✦
New Studies and a Reinvestigation on [4+2] Cycloadditions of (−)-Thebaine: Asymmetrical Diels-Alder Reactions with a Conformationally Fixed Chiral Diene
✍ Scribed by Pindur, Ulf ;Keilhofer, Diana
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 878 KB
- Volume
- 1993
- Category
- Article
- ISSN
- 0947-3440
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✦ Synopsis
Abstract
Some novel Diels‐Alder reactions of the opium alkaloid (−)‐thebaine (1) as an electron‐rich diene and a reinvestigation of its reactions with cyclic and acyclic dienophiles are described. The π‐facial selectivity has been studied on the basis of structural analyses of the cycloadducts. Some related results on [4 + 2] cycloaddition reactions of 1‐methoxy‐1,3‐cyclohexadiene (11) are also reported.