5??Isoxazolylhydrazines. Reduction of 5??isoxazolones to isoxazoles

G Adembri, F Ponticelli…

Index: Adembri,G. et al. Journal of Heterocyclic Chemistry, 1969 , vol. 6, p. 783 - 786

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Citation Number: 3

Abstract

In the extensive literature in the field of isoxazoles we could find only one method of preparation of the 3,4- disubstituted compounds, namely Stork and McMurray's synthesis (1) of the 3-substituted-4-carboxylic acid. The syntheses usually employed for preparing disubstituted isoxazoles, starting from P-ketoaldehydes or from nitrile oxides, yield both 4,5- and 3,4- or 3,s- and 3,4isomers (2,3), respectively. The resulting mixtures of products are difficult to ...