Stereoselectivity in the diels-alder reactions of tropylium ion
β Scribed by George B Clemans; Michael A. Dobbins
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- French
- Weight
- 228 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0040-4039
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β¦ Synopsis
New Diels-Alder reactions of tropylium ion are studied, and the observed stereoselectivities suggest that solvent effects determine the steric course of these reactions. Troplylium ion (1) has been found to undergo a number of Diels-Alder type reactions with high endo selectivity.2
π SIMILAR VOLUMES
Ni(COD)z/Ph3P or Ni(acac)2/Et3Al/PhsP have been shown to be effective catalysts for the stereoselective homo Diels-Alder reaction between norbomadiene and electron deficient olefins. High and opposite stereoselectivity was observed for cyclic and acyclic enones. Vinyl sulfoxides gave predominantly o
Hetero Diels-Alder reactions / Enamino ketones 1 High-pressure reactions / Pyrans The hetero Diels-Alder reaction of enamino ketone 1 with the vinyl ethers 7-11 leading to the dihydropyrans 12a-e and 13ae is studied in dichloromethane under high pressures up to 7 kbar. The kinetics is measured by o