Organic compounds -- part of the class 532-570 series – Organic compounds – Nitrogen attached directly or indirectly to the purine ring...
Reexamination Certificate
2005-11-01
2005-11-01
Berch, Mark L. (Department: 1624)
Organic compounds -- part of the class 532-570 series
Organic compounds
Nitrogen attached directly or indirectly to the purine ring...
C544S317000
Reexamination Certificate
active
06960662
ABSTRACT:
The present invention relates to a process for preparing 2-(pyridin-4-ylamino-pyrido [2,3-d]pyrimidine of Formula IIby reacting a 4-aminopyridine of the formulawith a 2-(4-imino-4H-pyridin-1-yl)-pyrido[2,3-d]pyrimidine of Formula Iin the presence of a base. It also relates to an alternative process for preparing a compound of Formula II by reacting the aminopyridine hereinabove within a unreactive organic solvent. It also relates to the compound of Formula III.
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Beylin Vladimir Genukh
Lee Richard Jungkyu
Marlatt Mark Eugene
Ashbrook Charles
Berch Mark L.
Eck Steven R.
Engelmann John H.
Warner-Lambert & Company
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