Keto-enol Tautomerism

Ethyl acetoacetate offers a classical and most thoroughly investigated example of keto and tautomerism.

Geuther (1863) assigned to it the keto structure while frank land and Dupa (1865) showed that ethyl acetoacetate had an enol structure, the presence of each of the keto and enol forms in ethyl acetoacetate was supported by two sets of reactions.

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