Intramolecular diels-alder reaction of aryl allene phosphonates
β Scribed by Latchezar S Trifonov; Svetlana D Simova; Alexander S Orahovats
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- French
- Weight
- 111 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
The reaction between the chiral allenic acid (+)-(S)-1 and the carbodiimides 2 a 4 and the keten-imine 6 gives, under mild conditions, the tricyclic compounds >5,7, and 8. Low diastereoselectivity and a partial loss of optical activity are observed. A stepwise mechanistic pathway oiu a biradical int
Intramolecular Diels-Alder reaction of selenoaldehydes which were generated from bis(trimethylsily1) selenide and dienals gave the corresponding bicyclic adducts.
The first examples of intramolecular Diels-Alder reactions on indoles indicate that this reaction may be employed for the direct preparation of highly functionalized dihydroindoles. The hybridization of the atoms in the tether plays a crucial role.
A mechanistic investigation into the recently reported intramolecular aryl Diels-Alder reaction was carried out using deuterium labeling. These studies led to the conclusion that the initial Diels-Alder adduct is isomerized to a highly conjugated tetra-ene intermediate which undergoes a stereospecif