Pyrido[2,3-D]pyrimidine inhibitors of phosphodiesterase (PDE) 7

Organic compounds -- part of the class 532-570 series – Organic compounds – Nitrogen attached directly or indirectly to the purine ring...

Reexamination Certificate

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C548S190000

Reexamination Certificate

active

07601836

ABSTRACT:
Pyrido[2,3-d]pyrimidine phosphodiesterase 7 (PDE 7) inhibitors are provided which are useful in treating T-cell mediated diseases, said inhibitors include:(i) 2-[[4-[[[4-(Aminosulfonyl)phenyl]methyl]amino]pyrido[2,3-d]pyrimidin-2-yl]amino]-4-methyl-5-thiazolecarboxylic acid, ethyl ester; and4-Methyl-2-[[4-[[[4-(methylsulfonyl)phenyl]methyl]amino]pyrido[2,3-d]pyrimidin-2-yl]amino]-5-thiazolecarboxylic acid, ethyl ester; or(ii) an enantiomer, diastereomer, tautomer or pharmaceutically acceptable salt of (i).

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