Modler-Spreitzer, Anja and Fritsch, Rainer and Mannschreck, Albrecht (2000) Helical phenanthrenes, Part 5. Synthesis of pentahelicene-7,8-dione via intramolecular benzoin condensation. COLLECTION OF CZECHOSLOVAK CHEMICAL COMMUNICATIONS, 65 (4). pp. 555-560. ISSN 0010-0765
Full text not available from this repository. (Request a copy)Abstract
The intramolecular benzoin condensation of [1,1'-binaphthyl]-2,2'-dicarbaldehyde (5), followed by oxidation with air, provides a new synthesis of (MP)-pentahelicene-7,8-dione (1). With reference to the original preparation of this quinone via acyloin condensation, its present yield (73% for the ring-closing step) is considerably increased.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TWISTED 9,10-PHENANTHRENEQUINONES; CATALYSIS; benzoin condensation; helicenediones; pentahelicene-7,8-dione; helicenes; quinones; binaphthyls; helicity |
| 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: | 17 May 2022 06:42 |
| Last Modified: | 17 May 2022 06:42 |
| URI: | https://pred.uni-regensburg.de/id/eprint/42612 |
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