Pyrazinone 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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Details

C544S257000, C544S349000, C544S350000, C544S354000

Reexamination Certificate

active

07148224

ABSTRACT:
The present invention relates to a compound of the general formula (I):[Ar1is aryl fused to the adjacent pyrazinone ring at the 5th and 6th positions, etc., X is CO, etc., Y is CH, etc., Z is CH, etc., V is CH, etc., Wnis —(CH2)n— (n is zero to four), R1, is H or optionally substituted lower alkyl, etc., R2is H, etc., R3and R4are the same or different and are each H, etc., R5and R6are the same or different and are each H, hydroxy, etc.] or a pharmaceutically acceptable salt or ester thereof; a pharmaceutical composition, an inhibitor of Cdk4 and/or Cdk6 or an anti-cancer agent, containing the same as an active ingredient; and a process for preparing them.

REFERENCES:
patent: 1 804 328 (1969-05-01), None
patent: 0 371 564 (1990-06-01), None
patent: 97/16447 (1997-05-01), None
Chemical Abstracts, vol. 100, abstract No. 34499, 1984.
Chemical Abstracts, vol. 81, abstract No. 120578, 1974.
Jungmann and Pfleiderer, “A New Efficient Method in Nucleoside Synthesis” Tetrahedron Letters, vol. 37, No. 46, pp. 8355-8358.
Lu et al., Cancer Chemotherapy Pharmacol., vol. 46, pp. 293-304, 2000.
John K. Buolamwini, Current Pharmaceutical Design, vol. 6, pp. 379-392, 2000.

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