Abstract: A pyrimidine derivative of formula (I) or (I′): wherein: Rx is a substituent as defined within; Q1 is optionally substituted phenyl, and Q1 bears a substituent of formula (Ia) wherein: X, Y1, Y2, Z, n, and m are as defined within; —NQ2 is an optionally substituted heterocyclic moiety containing one hydrogen heteroatom and optionally containing a further heteroatom; or a pharmaceutically acceptable salt in vivo hydrolysable ester thereof; are useful as anti-cancer agents. Processes for their manufacture and pharmaceutical compositions containing them are described.

Abstract: A pyrimidine derivative of formula (I) wherein V is O or S, Q1 and Q2 are independently selected from phenyl, naphthyl, a 5- or 6-membered monocyclic moiety and a 9- or 10-membered bicyclic heterocyclic moiety; and Q1 is substituted by one substituent of formula (Ia), and Q2 may optionally bear further substituents of formula (Ia) wherein X is CH2—, O—, NH—, NRy— or —S—[wherein Ry is as defined within]; Y1 is H, C1-4alkyl or as defined for Z; Y2 is H or C1-4alkyl; Z is RaO—, RbRcN—, RdS—, ReRfNNRg—, a nitrogen linked heteroaryl or a nitrogen linked heterocycle, wherein Ra, Rb, Rc, Rd, Re, Rf and Rg are as defined within; n is 1, 2 or 3; m is 1, 2 or 3; and Q1 and Q2 may optionally be further substituted; or a pharmaceutically acceptable salt or in vivo hydrolysable ester thereof; are useful as anti-cancer agents; and processes for their manufacture and pharmaceutical compositions containing them are described.

Abstract: A pyrimidine derivative of formula (I): wherein: R1 is an optional substituent as defined within; Rx is selected from halo, hydroxy, nitro, amino, cyano, mercapto, carboxy, sulphamoyl, formamido, ureido or carbamoyl or a group of formula (Ib): A—B—C— as defined within; Q1 and Q2 are independently selected from aryl, a 5- or 6-membered monocyclic moiety; and a 9- or 10-membered bicyclic heterocyclic moiety; and one or both of Q1 and Q2 bears on any available carbon atom one substituent of formula (Ia) as defined within; and Q1 and Q2 are optionally further substituted; or a pharmaceutically acceptable salt or in vivo hydrolysable ester thereof; are useful as anti-cancer agents; and processes for their manufacture and pharmaceutical compositions containing them are described.