PHARMACEUTICAL COMPOUNDS

摘要

The invention provides a compound of the formula (1): or a salt, N-oxide or tautomer thereof; wherein R1 is cyano or C1-4 alkyl; R2 is hydrogen or C1-4 alkyl; R3 is hydrogen or C1-4 alkyl; R4 and R5 are the same or different and each is selected from hydrogen, saturated C1-4 hydrocarbyl and saturated C1-4 hydrocarbyloxy; R6 and R7 are the same or different and each is selected from hydrogen, halogen, CN, C1-4 alkyl and C1-4 alkoxy wherein the C1-4 alkyl and C1-4 alkoxy are each optionally substituted with hydroxy, C1-2 alkoxy or by one or more flourine atoms; R8 is hydrogen or C1-4 alkyl; Q is an alkylene chain of 1 to 4 carbon atoms in length between the moiety Ar and the nitrogen atom N, wherein one or more of the 1 to 4 carbon atoms of the alkylene chain may optionally be substituted with one or two C1-4 alkyl groups, or wherein one carbon atom of the 1 to 4 carbon atoms of the alkylene chain may optionally be substituted with a group -CH2CH2- which together with the said one carbon atom forms a cyclopropyl group; m is 1, 2, 3 or 4; n is 0 or 1; and Ar is a monocyclic or bicyclic aryl or heteroaryl group of 5 to 10 ring members containing 0, 1, 2, 3 or 4 heteroatom ring members selected from O, N and S, the aryl or heteroaryl group being optionally substituted with one to four substituents R13 as defined in the claims. The compounds are inhibitors of Chk-1 kinase and are active against cancers.