Imidazo[1,2-A]pyridine and pyrazolo[2,3-A]pyridine derivatives

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...

Reexamination Certificate

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C514S272000, C544S321000, C544S331000

Reexamination Certificate

active

06855719

ABSTRACT:
A compound of formula (I) wherein Ring A is imidazol[1,2a]pyrid-3-yl or pyrazolo[2,3a]pyrid-3-yl; R2is as defined within; m is 0-5; wherein the values of R2may be the same or different; R1is as defined within; n is 0 to 2, wherein the values of R1may be the same or different; Ring B is phenyl or phenyl fused to a C5-7cycloalkyl ring; R3is as defined within; p is 0-4; wherein the values of R3may be the same or different; R4is as defined within; q is 0-2; wherein the values of R4may be the same or different; and wherein p+q≦5; or a pharmaceutically acceptable salt or an in vivo hydrolyzable ester thereof is described. The use of compounds of formula (I) in the inhibition of cell cycle kinases CDK2, CDK4, and CDK6 are also described. Pharmaceutical compositions, methods and processes for preparation of compounds of formula (I) are detailed.

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