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US 5,294,711 AGranted
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 fluorescent 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.
Claims1
3,6-diamino-2,5-pyrazinedicarbonitrile.
Dependencies are inferred from the claim text.