| abstract |
Compounds of formula (I) are inhibitors of HSP90, and useful in the treatment of, for example, cancers: Formula (I) wherein R2 is a group of formula (IA): -(Ar1)m (Alk1)P (Z)r (Alk2)s-Q (1A) wherein in any compatible combination Ar1 is an optionally substituted aryl or heteroaryl radical, Alk1 and Alk2 are optionally substituted divalent C1-C3 alkylene or C2-C3 alkenylene radicals, m, p, r and s are independently 0 or 1, Z is -0-, -S-, -(C=0)-, -(C=S)-, -SO2-, -C(=O)O-, -C(=O)NRA- , -C(=S)NRA-, -SO2NRA-, -NRAC(=0)-, -NRAS02- or -NRA- wherein RA is hydrogen or C1-C6 alkyl, and Q is hydrogen or an optionally substituted carbocyclic or heterocyclic radical; R3 is hydrogen, an optional substituent, or an optionally substituted (C1-C6)alkyl, aryl or heteroaryl radical; and R4 is (i) hydrogen, a -CN group, a nitro group -NO2, or a - C(=NOH)(NH2) group, or(ii) an optionally substituted C1-C6alkyl, aryl, heterocyclic, aryl(C1-C6alkyl)-, or heterocyclic(C1-C6alkyl)- group, or (iii) a group of formula - C(=0)R5 wherein R5 is hydroxyl, optionally substituted C1-C6alkyl, C1-C6alkyoxy, aryl, aryloxy, heteroaryl, heteroaryloxy,aryl(C1-C6alkyl)-, aryl(C1-C6alkoxy)-, heteroaryl(C1-C6alkyl)-, or heteroaryl(C1-C6alkoxy)-, or (iv) a group of formula -C(=O)NHR6 wherein R6 is primary, secondary, tertiary or cyclic amino, or hydroxyl, optionally substituted C1-C6alkyl, C1-C6alkyoxy, aryl, aryloxy, heteroaryl, heteroaryloxy, aryl(C1-C6alkyl)-, aryl(C1-C6alkoxy)-, heteroaryl(C1-C6alkyl)-, or heteroaryl(C1-C6alkoxy)-. |