Abstract: The invention provides compounds of the formula (1): or salts or tautomers thereof; wherein X1 is N or N+(O?); X2 is N or CH; Q is a C1-3 alkylene group; R1 is selected from hydrogen, C1-4 hydrocarbyl and hydroxy-C2-4 hydrocarbyl; R2, R3 and R4 are the same or different and each is selected from hydrogen, fluorine, chlorine and methyl; Ar1 is an optionally substituted monocyclic 5 or 6-membered aryl or heteroaryl ring containing 0, 1 or 2 heteroatom ring members selected from O, N and S, or a naphthyl ring and Ar2 is an optionally substituted monocyclic 5 or 6-membered heteroaryl ring containing 1, 2 or 3 heteroatom ring members selected from O, N and S. The compounds of formula (1) are inhibitors of p70S6 kinase and are useful in the treatment of proliferative diseases.

Abstract: The invention provides kinase inhibitor compounds of the formula (1): or salts, solvates, tautomers or N-oxides thereof; wherein X is O, CO, X1C(X2), C(X2)X1, X1C(X2)X1, S, SO, SO2, NRc, SO2NRc or NRcSO2; m is 0-2; n is 0-1; q is 0-2; A is C1-6 alkylene optionally interrupted by O; R1 is halogen, cyano, nitro, an optionally substituted acyclic C1-6 hydrocarbon group, optionally substituted C3-7 cycloalkyl, optionally substituted phenyl, optionally substituted five membered heteroaryl, NR2R3, Ra—Rb, O—Rb or C(O)NR2R8; R4 is fluorine, chlorine, methyl or cyano; R2 is hydrogen or optionally substituted C1-4 alkyl; R3 is Ra—Rb; or NR2R3 forms a 4 to 7 membered non-aromatic heterocyclic ring; Ra is a bond, C(X2), C(X2)X1, SO, SO2 or SO2NRc; Rb is hydrogen or an optionally substituted 3 to 7-membered carbocyclic or heterocyclic ring or an optionally substituted C1-12 acyclic hydrocarbon group; Rc is hydrogen or a C1-4 hydrocarbon group; Rd is O, CO, X1C(X2), C(X2)X1, X1C(X2)X1, S, SO, SO2, NRc, SO2NRc or NRcSO2

Abstract: The invention relates to novel heterocyclic N-oxides which are useful as hypoxic selective cytotoxic agents that mediate and/or inhibit cell proliferation, for example, through the activity of protein kinases. The invention is further related to pharmaceutical compositions containing such compounds and compositions, and to methods of treating cancer as well as other disease states associated with unwanted ahgiogenesis and/or cellular proliferation by administering effective amounts of such compounds.

Abstract: The invention provides a Chk-1 kinase inhibiting compound of the formula (I) or a salt, solvate or tautomer thereof, wherein: G is CH2, O, NH, NHCO or CONH; A is a group (CH2)n where n is 1 to 4 provided that when G is O or NH, n is at least 2; X1 is nitrogen or CH; X2 is nitrogen or a group CR5; X3 is nitrogen or a group CR5; X4 is nitrogen or CH; provided that no more than two of X2, X3 and X4 are nitrogen; and R1; R2; R3; R4; R5 and R6 are as defined in the claims.

Abstract: The invention relates to novel heterocyclic triazines which are useful as hypoxic selective cytotoxic agents that mediate and/or inhibit cell proliferation, for example, through the activity of protein kinases. The invention is further related to pharmaceutical compositions containing such compounds and compositions, and to methods of treating cancer as well as other disease states associated with unwanted angiogenesis and/or cellular proliferation by administering effective amounts of such compounds.