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
✦ LIBER ✦
(2E)-4-methoxy-2,4-pentadienamides as new dienes in the Diels-Alder reaction
✍ Scribed by M.Carmen Bernabeu; Rafael Chinchilla; Carmen Nájera; Miguel A Rodríguez
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- French
- Weight
- 236 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0040-4039
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