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Über die Wanderung der Carboxylatgruppe bei der Benzilsäureumlagerung. 26. Mitteilung über Reduktone und Tricarbonylverbindungen

✍ Scribed by Heike Rodé-Gowal; Hans Dahn


Publisher
John Wiley and Sons
Year
1973
Tongue
German
Weight
556 KB
Volume
56
Category
Article
ISSN
0018-019X

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✦ Synopsis


Abstract

The benzilic acid rearrangement of ethyl α,β‐dioxo‐butyrate was studied by NMR.‐and UV.‐techniques. In weak alkaline media (pH < 10) the ester group is hydrolyzed first, then the carboxylate group migrates to form methyltartronate. The migration of the carboxylate group was proved by radioactive labeling. At higher pH‐values (pH > 11,5) the intakt ester group migrates, with ester hydrolysis occuring as a second step.


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