Phthalazinone derivatives

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

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C544S237000

Reexamination Certificate

active

07981889

ABSTRACT:
Compounds of the formula (I):wherein A and B together represent an optionally substituted, fused aromatic ring; X can be NRXor CRXRY; if X═NRXthen n is 1 or 2 and if X═CRXRYthen n is 1; RXis selected from the group consisting of H, optionally substituted C1-20alkyl, C5-20aryl, C3-20heterocyclyl, amido, thioamido, ester, acyl, and sulfonyl groups; RYis selected from H, hydroxy, amino; or RXand RYmay together form a spiro-C3-7cycloalkyl or heterocyclyl group; RC1and RC2are both hydrogen, or when X is CRXRY, RC1, RC2, RXand RY, together with the carbon atoms to which they are attached, may form an optionally substituted fused aromatic ring; and R1is selected from H and halo.

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