The behaviour of α,β‐dioxopropionic acid derivatives of the type RCOCOCOX (R = phenyl, __p__‐substituted phenyls, CF~3~, mesityl; X = OC~2~H~5~, NH~2~) was investigated under benzilic acid rearrangement conditions. Nearly all compounds were cleaved by alkali to give the corresponding acids RCOOH
Alkalische Spaltung und Benzilsäureumlagerung von 1,2,3-Triketonen. 29. Mitt. über Reduktone und Tricarbonylverbindungen [1]
✍ Scribed by Huu Lé Dao; Francis Dayer; Laurent Duc; Heike Rodé-Gowal; Hans Dahn
- Publisher
- John Wiley and Sons
- Year
- 1974
- Tongue
- German
- Weight
- 580 KB
- Volume
- 57
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Under the conditions of the benzilic acid rearrangement diaryl und dialkyl 1,2,3‐triketones RCOCOCOR′ show two reactions: (1) Migration of RCO towards the more electronegative or less hindered CO group, yielding an α‐hydroxy‐β‐ketoacid which can undergo secondary reactions, and (2) direct cleavage between adjacent carbonyl groups forming RCOOH and R′CHOHCOOH, RCO being more electronegative or less hindered than R′CO. The balance between these reactions depends upon the steric and electronic properties of R and R′.
📜 SIMILAR VOLUMES
The synthesis of __22__ substituted tricarbonyl compounds is reported. They were obtained either by oxidation of β‐dicarbonyl compounds with SeO~2~ or nitrous oxides or by oxidation of the α‐bromo‐β‐dicarbonyl compounds with DMSO. The procedures using SeO~2~ or DMSO are more rapid and give in genera
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