Photochemical Promotion of the Intramolecular Pauson−Khand Reaction. A New Experimental Protocol for Cobalt-Catalyzed [2 + 2 + 1] Cycloadditions
✍ Scribed by Pagenkopf, Brian L.; Livinghouse, Tom
- Book ID
- 121872082
- Publisher
- American Chemical Society
- Year
- 1996
- Tongue
- English
- Weight
- 127 KB
- Volume
- 118
- Category
- Article
- ISSN
- 0002-7863
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📜 SIMILAR VOLUMES
Heat alone has been found sufficient to promote intramolecular Pauson-Khand cyclizations catalyzed by high purity Co2(CO)s. The existence of a very narrow thermal window (e.g., 60 °C -70 °C) for the attainment of efficient catalysis is a noteworthy characteristic of this process.
## Abstract magnified image The title compound 2‐butyl‐5‐chloro‐3__H__‐imidazole‐4‐carbaldehyde was transformed into tricyclic heterocycles by substituting the chlorine atom by an unsaturated thiolate or alkoxide and then converting aldehyde function into 1,3‐dipole. Chloramine‐T was used as an ef