Study on the murexide reaction. V

M Koyama, H Kozuka, A Takada

Index: Koyama, Matajiro; Kozuka, Hiroshi; Takada, Atsushi Journal of Heterocyclic Chemistry, 1991 , vol. 28, # 3 p. 801 - 804

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Abstract

Abstract Although the reaction of caffeine with hydrogen peroxide/hydrochloric acid or nitric acid and then with ammonia has been known to give a purple coloration (Murexide reaction), the use of hydrazine instead of ammonia is found to provide no purple coloration. The reaction of caffeine with hydrogen peroxide/hydrochloric acid and then with hydrazine hydrate afforded a yellow reaction mixture, from which 4-methyl-6-(N-methylcarbamoyl)-3, ...