| abstract |
The present invention provides compounds of the formula (I) n n n n n n n n n n n n wherein: n X 1 , X 2 and X 3 are heteroatoms; n R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 are independently selected from H, halo, —OH, —NO 2 , —CN and optionally substituted aliphatic, cycloalkyl, heterocycloalkyl, aryl or heteroaryl; and n Z is optionally substituted C 1-8 straight-chained or branched aliphatic, optionally containing 1 or more double or triple bonds, wherein one or more carbons are optionally replaced by R* wherein R* is optionally substituted cycloalkyl, heterocycloalkyl, aryl or heteroaryl; an amino acid residue, H, —CN, —C(O)—, —C(O)C(O)—, —C(O)NR 1 —, —C(O)NR 1 NR 2 —, —C(O)O—, —OC(O)—, —NR 1 CO 2 —, —O—, —NR 1 C(O)NR 2 —, —OC(O)NR 1 —, —NR 1 NR 2 —, —NR 1 C(O)—, —S—, —SO—, —SO 2 —, —NR 1 —, —SO 2 NR 1 —, —NR 1 R 2 , or —NR 1 SO 2 —, wherein R 1 and R 2 are independently selected from H and optionally substituted aliphatic, cycloalkyl, heterocycloalkyl, aryl or heteroaryl; or where R* is NR 1 R 2 , R 1 and R 2 optionally together with the nitrogen atom form an optionally substituted 5-12 membered ring, said ring optionally comprising 1 or more heteroatoms or a group selected from —CO—, —SO—, —SO 2 — and —PO—; or n a pharmaceutically acceptable salt, ester or prodrug thereof. |