| abstract |
Compounds of formula (I) are inhibitors of HSP90, and useful in the treatment of, for example, cancers: n n n n n n n n n n wherein R 2 is a group of formula (IA): n -(Ar 1 ) m -(Alk 1 ) p -(Z) r -(Alk 2 ) s -Q (IA) n wherein in any compatible combination Ar 1 is an optionally substituted aryl or heteroaryl radical, Alk 1 and Alk 2 are optionally substituted divalent C 1 -C 3 alkylene or C 2 -C 3 alkenylene radicals, m, p, r and s are independently 0 or 1, Z is —O—, —S—, —(C═O)—, —(C═S)—, —SO 2 —, —C(═O)O—, —C(═O)NR A —, —C(═S)NR A —, —SO 2 NR A —, —NR A C(═O)—, —NR A SO 2 — or —NR A — wherein R A is hydrogen or C 1 -C 6 alkyl, and Q is hydrogen or an optionally substituted carbocyclic or heterocyclic radical; R 3 is hydrogen, an optional substituent, or an optionally substituted (C 1 -C 6 )alkyl, aryl or heteroaryl radical; and R 4 is (i) hydrogen, a —CN group, a nitro group —NO 2 , or a —C(═NOH)(NH 2 ) group, or (ii) an optionally substituted C 1 -C 6 alkyl, aryl, heterocyclic, aryl(C 1 -C 6 alkyl)-, or heterocyclic(C 1 -C 6 alkyl)- group, or (iii) a group of formula —C(═O)R 5 wherein R 5 is hydroxyl, optionally substituted C 1 -C 6 alkyl, C 1 -C 6 alkyoxy, aryl, aryloxy, heteroaryl, heteroaryloxy, aryl(C 1 -C 6 alkyl)-, aryl(C 1 -C 6 alkoxy)-, heteroaryl(C 1 -C 6 alkyl)-, or heteroaryl(C 1 -C 6 alkoxy)-, or (iv) a group of formula —C(═O)NHR 6 wherein R 6 is primary, secondary, tertiary or cyclic amino, or hydroxyl, optionally substituted C 1 -C 6 alkyl, C 1 -C 6 alkyoxy, aryl, aryloxy, heteroaryl, heteroaryloxy, aryl(C 1 -C 6 alkyl)-, aryl(C 1 -C 6 alkoxy)-, heteroaryl(C 1 -C 6 alkyl)-, or heteroaryl(C 1 -C 6 alkoxy)-. |