The N-substituted isomeric (4Z,5Z)-and (4E,5Z)-4,5-diethylideneoxazolidin-2-ones 5 and 6 were synthesized, the latter being favored during the one-step process from the a-diketone 1c and different isocyanates. The steric interaction between the N-substituent and the Me group attached to the exocycli
Diels-Alder reactions of protoanemonin with heterosubstituted dienes. Synthesis of polyfunctional oxaspiro[4.5]decanes.
✍ Scribed by Daniel Alonso; Josep Font; Rosa M. Ortuño; Jean d'Angelo; André Guingant; Claudette Bois
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- French
- Weight
- 402 KB
- Volume
- 47
- Category
- Article
- ISSN
- 0040-4020
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✦ Synopsis
Cycloadditions of protoaneQwmin (1) with different kinds of heterosubstituted dienes have been tried under several reaction conditions; 1 has revealed to be a good dienophile towards electron-rich dienes giving adducts that can be easily transfoned into useful synthetic building blocks.
📜 SIMILAR VOLUMES
Absbuct :Facially dissymmetti ntakic anhydridc I is synthesized and tmkrgoes Diels-Alder cyckuukiitions with cyclic dicnes exclusively on the fke syn to its etheno-bridges.
## Abstract The title reaction proceeds with high regio‐ and diastereoselectivity.