NOVEL 4-CYANO, 4-AMINO, AND 4-AMINOMETHYL DERIVATIVES OF PYRAZOLO[1,5-a]PYRIDINES, PYRAZOLO[1,5-c]PYRIMIDINES AND 2H-INDAZOLE COMPOUNDS AND 5-CYANO, 5-AMINO, AND 5-AMINOMETHYL DERIVATIVES OF IMIDAZO[1,2-a]PYRIDINES, AND IMIDAZO[1,5-a]PYRAZINES AS CYCLIN DEPENDENT KINASE INHIBITORS

A compound represented by the structural formula:

• wherein:
• Y is selected from the group consisting of CN, NH2, and CH2NH2;
• R1 is selected from the group consisting of H, halogen, R9, NH2, CN, alkyl, alkenyl, alkynyl, aryl, heteroaryl, CF3, heterocyclylalkyl, arylalkyl, heteroarylalkyl, heterocyclyalkylalkyl, cycloalkyl, cycloalkylalkyl, C(O)OR4, alkyl substituted with 1-6 R9 groups which can be the same or different and are independently selected from the list of R9 shown later below,
• wherein the aryl in the above-noted definitions for R1 can be unsubstituted or optionally substituted with one or more moieties which can be the same or different, each moiety being independently selected from the group consisting of halogen, CN, NH2, —OR5, SRS, —CH2OR5, —C(O)R5, —SO3H, —S(O2)R6, —S(O2)NR5R6, —NR5R6, —C(O)NR5R6, —CF3, and —OCF3;
• R2 is selected from the group consisting of H, halogen, —NR5R6, —C(O)OR4, —C(O)NR5R6, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl, aryl, arylalkyl, heterocyclyl, heterocyclylalkyl, heteroaryl,
• wherein each of said alkyl, alkenyl, alkynyl, cycloalkyl, aryl, arylalkyl, heterocyclylalkyl, heteroaryl and heteroarylalkyl for R2 and heterocyclyl moieties whose structures are shown immediately above for R2 can be unsubstituted or optionally independently substituted with one or more moieties which can be the same or different, each moiety being independently selected from the group consisting of halogen, alkyl, alkenyl, alkynyl, aryl, cycloalkyl, CF3, CN, —OCF3, —(CR4R5)nOR5, —OR5, —R5OR5, —NR5R6, —(CR4R5)nNR5R6, —C(O2)R5, —C(O)R5, —C(O)NR5R6, —SR6, —S(O2)R6, —S(O2)NR5R6, —N(R5)S(O2)R7, —N(R5)C(O)R7 and —N(R5)C(O)NR5R6;
• R3 is selected from the group consisting of a halogen, CN, amino, alkylamino, cycloalkylamino, arylalkylamino, heteroarylamino, heteroarylalkylamino, hydroxyalkylamino, heterocycloalkylalkylamino, wherein each of said amino, alkylamino, cycloalkylamino, arylalkylamino, heteroarylamino, heteroarylalkylamino, hydroxyalkylamino, and heterocycloalkylalkylamino can be unsubstituted or optionally independently substituted with one or more moieties, which can be the same or different, each moiety being independently selected from the group consisting of halogen, alkyl, aryl, heteroaryl, cycloalkyl, heterocycloalkyl, heteroarylalkyl, heterocycloalkylalkyl, cycloalkylalkyl, CF3, OCF3, CN, —OR5, —NR5R6, —C(R4R5)nOR5, —C(O2)R5, —C(O)R5, —C(O)NR5R6, —SR6, —S(O2)R7, —S(O2)NR5R6, —N(R5)S(O2)R7, —N(R5)C(O)R7 and —N(R5)C(O)NR5R6;
• R4 is H, halogen, CN or alkyl;
• R5 is H or alkyl;
• R6 is selected from the group consisting of H, alkyl, aryl, arylalkyl, cycloalkyl, heterocycloalkyl, heteroaryl, and heteroarylalkyl, wherein each of said alkyl, aryl, arylalkyl, cycloalkyl, heterocyclolalkyl, heteroaryl, and heteroarylalkyl can be unsubstituted or optionally substituted with one or more moieties which can be the same or different, each moiety being independently selected from the group consisting of halogen, alkyl, aryl, cycloalkyl, CF3, OCF3, CN, —OR5, —NR5R10, —N(R5)Boc, —(CR4R5)nOR5, —C(O2)R5,
• —C(O)R5, —C(O)NR5R10, —SO3H, —SR10, —S(O2)R7, —S(O2)NR5R10, —N(R5)S(O2)R7, —N(R5)C(O)R7 and —N(R5)C(O)NR5R10;
• R10 is selected from the group consisting of H, alkyl, aryl, arylalkyl, cycloalkyl, heterocycloalkyl, heteroaryl, and heteroarylalkyl, wherein each of said alkyl, aryl, arylalkyl, cycloalkyl, heterocycloalkyl, heteroaryl, and heteroarylalkyl can be unsubstituted or optionally substituted with one or more moieties which can be the same or different, each moiety being independently selected from the group consisting of halogen, alkyl, aryl, cycloalkyl, CF3, OCF3, CN, —OR5, —NR4R5, —N(R5)Boc, —(CR4R5)nOR5, —C(O2)R5,
• —C(O)NR4R5, —C(O)R5, —SO3H, —SR5, —S(O2)R7, —S(O2)NR4R5, —N(R5)S(O2)R7, —N(R5)C(O)R7 and —N(R5)C(O)NR4R5;
• optionally (i) R5 and R10 in the moiety —NR5R10, or (ii) R5 and R6 in the moiety —NR5R6, may be joined together to form a cycloalkyl or heterocycloalkyl moiety, with each of said cycloalkyl or heterocycloalkyl moiety being unsubstituted or optionally independently being substituted with one or more R9 groups;
• R7 is selected from the group consisting of alkyl, cycloalkyl, aryl, heterocycloalkyl, heteroaryl, arylalkyl and heteroarylalkyl, wherein each of said alkyl, cycloalkyl, aryl, heterocycloalkyl, heteroaryl, arylalkyl and heteroarylalkyl, for R7 can be unsubstituted or optionally independently substituted with one or more moieties which can be the same or different, each moiety being independently selected from the group consisting of halogen, alkyl, aryl, cycloalkyl, CF3, OCF3, CN, —OR5, —NR5R10, —CH2OR5, —C(O2)R5, —C(O)NR5R10, —C(O)R5, —SR10, —S(O2)R10, —S(O2)NR5R10, —N(R5)S(O2)R10, —N(R5)C(O)R10 and —N(R5)C(O)NR5R10;
• R8 is selected from the group consisting of R6, —C(O)NR5R10, —CH2OR4, —C(O)OR6, —C(O)R7 and —S(O2)R7;
• R9 is selected from the group consisting of halogen, —CN, —NR5R6, —(CH2)nOR4, —C(O2)R6, —C(O)NR5R6, —OR6, —SR6, —S(O2)R7, —S(O2)NR5R6, —N(R5)S(O2)R7, —N(R5)C(O)R7 and —N(R5)C(O)NR5R6;
• m is 0 to 4;
• and
• n is 1 to 4.