Pyrazolo[4,3-d]pyrimidines, processes for their preparation...

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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C544S262000

Reexamination Certificate

active

07745450

ABSTRACT:
The invention relates to 3-, 5-, 7-trisubstituted pyrazolo[4,3-d]pyrimidines represented by the general formula Iand pharmaceutically acceptable salts thereof, whereinR3 is an optionally substituted alkyl, cycloalkyl, cycloheteroalkyl, cycloalkyl alkyl, aryl or alkylaryl group;R5 is halogen, —NHNH2, —NHOH, NHCONH2, guanylo (NH—C(NH)NH2) an optionally substituted C1-C6alkyl, alkenyl, alkynyl, C3-C15cycloalkyl, Rf(C3-C15cycloalkyl), heterocyclyl, heteroalkyl, aryl, heteroaryl, arylalkylene, arylalkenylene, arylalkynylene, cycloheteroalkyl, cycloheteroalkyl alkyl, heteroarylalkylene, heteroarylalkenylene, heteroarylalkynylene group, the group —C(O)—Ra, —C(O)NRbRc, —SO3Rd, or —NHC(O)Re, wherein Raand Rfare an optionally substituted C1-C6alkyl, alkenyl, or alkynyl group, Rb, Rc, and Rdare independently selected from the group consisting of H, optionally substituted C1-C6alkyl, alkenyl, or alkynyl group, and Reis a hydroxy, amino, alkoxy, alkylamino, optionally substituted C1-C6alkyl, alkenyl or alkynyl group; or the group —X—R5′, wherein X is —NH—, —O—, —S— or —N(alkyl)- and R5′ is hydrogen, an optionally substituted C1-C6alkyl, alkenyl, alkynyl, C3-C15cycloalkyl, Rf(C3-C15cycloalkyl), aryl, heterocyclyl, hetero C1-C6alkyl, arylalkylene, arylalkenylene, arylalkynylene, heteroaryl, cycloheteroalkyl, cycloheteroalkyl alkyl, or heteroarylalkylene, heteroarylalkenylene, heteroarylalkynylene group, the group —C(O)—Ra, —C(O)NRbRc, —SO3Rd, or —NHC(O)Re, wherein Ra, Rb, Rc, Rd, Reand Rfhave the above meaning, andR7 is halogen, —NHNH2, NHOH, NHCONH2, guanylo (NH—C(NH)NH2) or the group —X—R7′, wherein X has the above meaning and the meaning of R7′is as defined for R5′.

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