Studies on the syntheses of heterocyclic compounds-195-The structure of a yellow substance formed by mild oxidation of aminopyrine

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  • Studies on the Syntheses of Heterocyclic Compounds. CXCV. The Structure of a Yellow Substance formed by Mild Oxidation of Aminopyrine.

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A yellow substance, which slightly formed as a by-product in case of preparation of a molecular compound by fusion of aminopyrine (I) with secobarbital or barbital in the presence of air, was also obtained by mild oxidation of I with air in a poor yield. Structural elucidation by physical and chemical methods was carried out, leading eventually to confirm the formula (II) for the yellow substance as above.

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