Zimmermann, Thomas and Pustet, Nikola and Mannschreck, Albrecht (1999) The enantiomers of 7aH-cyclopenta[b]pyran-7-ones and their thermal racemization. JOURNAL FUR PRAKTISCHE CHEMIE-CHEMIKER-ZEITUNG, 341 (4). pp. 395-397. ISSN 0941-1216,
Full text not available from this repository.Abstract
The separation of the enantiomers of 7aH-cyclopenta[b]pyran-7-ones 1 was performed by enantioselective liquid chromatography with the sorbent/solvent systems triacetylcellulose/methanol, tribenzoylcellulose/methanol, and (+)-poly(trityl methacrylate)/silica gel/n-heptane/isopropanol. Barriers to ring opening were determined for two 7a-methyl and two 7a-phenyl substituted 2,4,5-triaryl derivatives by thermal racemization of the enantiomers. Substituted cyclopentadienones 2 are discussed as intermediates in the thermal electrocyclic ring opening/ring closure reactions.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | RING; cyclopentadienes; enantiomeric resolution; kinetics; valence isomerization |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Organische Chemie > Alumni or Retired Professors > Prof.Dr. Mannschreck |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 29 Nov 2022 15:39 |
| Last Modified: | 29 Nov 2022 15:39 |
| URI: | https://pred.uni-regensburg.de/id/eprint/48663 |
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