3,6-diamino-2,5-pyrazinedicarbonitrile
AssigneeNippon Soda Co., Ltd.
InventorsSeiji Tazaki, Tomio Yagihara, Nobuo Matsui, Atsushi Yanagisawa, Takakazu Kojima
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Abstract
This invention relates to 3,6-diamino-2,5-pyrazinedicarbonitrile which is a red crystal and yellowish green fluorenscent substance and the methods of preparation from compounds represented by formula [I], ##STR1## (wherein R are aryl, alkyl, aralkyl or alkenyl or may be substituted), as a starting material, under acidic condition in the presence of oxygen.
Claims8
A process for the production of 3,6-diamino-2,5-pyrazinedicarbonitrile, from compounds having the formula ##STR4## where R is aryl, alkyl, aralkyl or alkenyl, as a starting material, and, reacting said compound in an acidic solution or a solution of the salt(s) of said acidic solution, by bubbling air through the solution for a period of between about 1 to about 12 hours at atmospheric pressure and room temperature with the pH of the solution being kept at from about 1 to about 5.
Dependencies are inferred from the claim text.