Organic compounds -- part of the class 532-570 series – Organic compounds – Nitrogen attached directly or indirectly to the purine ring...
Patent
1992-08-07
1994-05-31
Bernhardt, Emily
Organic compounds -- part of the class 532-570 series
Organic compounds
Nitrogen attached directly or indirectly to the purine ring...
558396, 558438, C07D24126
Patent
active
053171020
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.
REFERENCES:
patent: 3674749 (1972-07-01), Craven
patent: 3763161 (1973-10-01), Hartter
patent: 3928351 (1975-12-01), Donald
Begland et al, J. Org. Chem. 39, p. 1235 (1974).
The Pyrazines by G. B. Barlin, vol. 41, of The Chemistry of Heterocyclic Compounds, pp. 35-36, 98, 126, 128, 129, 280 (1982).
Kojima Takakazu
Matsui Nobuo
Tazaki Seiji
Yagihara Tomio
Yanagisawa Atsushi
Bernhardt Emily
Mason, Jr. Joseph C.
Nippon Soda Co. Ltd.
Oujevolk George B.
Smith Ronald E.
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