Organic compounds -- part of the class 532-570 series – Organic compounds – Nitrogen attached directly or indirectly to the purine ring...
Patent
1994-02-04
1995-10-17
Bernhardt, Emily
Organic compounds -- part of the class 532-570 series
Organic compounds
Nitrogen attached directly or indirectly to the purine ring...
544405, 544408, 544409, 544410, 564258, 564344, C07D24112, C07D24116, C07D24118, C07D40310
Patent
active
054592666
ABSTRACT:
The present invention provides novel substituted pyrazines or pyrazine derivatives ("NPD") which are functional and have useful application as a monomer for a variety of high performance polymers such as polyester, polyarylate, polycarbonate, polyetherketones, epoxides, polyimides, polyamides, and polyamides-imides. These NPD have the general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are defined herein.
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Fruchey Olan S.
Juneau Kathleen N.
Kuila Debasish
Kvakovszky George
McDonough Joseph A.
Bernhardt Emily
Cassady Donald R.
Hoechst Celanese Corporation
Mullen James J.
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