Geometrical Isomerism of Phenylhydrazones of α-Keto Esters. II. p-Substituted Phenylhydrazones of Ethyl Pyruvate and 2, 4-Dinitrophenylhydrazones of Some α-Keto …

F Ishibashi, T Nashima, J Nishino, I Kobayashi…

Index: Ishibashi, Fumihide; Nashima, Takeo; Nishino, Junko; Kobayashi, Ikuko; Ichihara, Yoshinori; et al. Bulletin of the Chemical Society of Japan, 1986 , vol. 59, p. 73 - 76

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Citation Number: 4

Abstract

Each geometrical isomer of various substituted phenylhydrazones of ethyl pyruvate and 2, 4- dinitrophenylhydrazones of some α-keto esters was isolated in a pure state. Partial isomerizations of the E-isomers of the former hydrazones to the Z-isomers took place by keeping solutions of the hydrazones in organic solvents containing C, H, and Cl in the dark. An E-or Z-structure was assigned to each molecule on the basis of IR and 1 H NMR ...

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