Abstract: Compounds of formula (I) or a pharmaceutically acceptable salt thereof, wherein: W is O, N—H, N—(C1-C10 alkyl) or S; each X is independently CH or N; R1 is a 5 to 7-membered saturated or unsaturated, optionally substituted heterocycle containing at least 1 heteroatom selected from N or O; R2 is (LQ)mY; and each R3 is independently H, C1-C10alkyl, aryl or heteroaryl, are surprisingly found to be inhibitors of PI3K-p110?, and therefore have utility in therapy.

Abstract: Compounds of formula (I) or a pharmaceutically acceptable salt thereof, wherein: W is O, N—H, N—(C1-C10 alkyl) or S; each X is independently CH or N; R1 is a 5 to 7-membered saturated or unsaturated, optionally substituted heterocycle containing at least 1 heteroatom selected from N or O; R2 is (LQ)mY; and each R3 is independently H, C1-C10alkyl, aryl or heteroaryl, are surprisingly found to be inhibitors of PI3K-p110?, and therefore have utility in therapy.

Abstract: Compounds of formula (I) or a pharmaceutically acceptable salt thereof, wherein: W is O, N—H, N-(C1-C10 alkyl) or S; each X is independently CH or N; R1 is a 5 to 7-membered saturated or unsaturated, optionally substituted heterocycle containing at least 1 heteroatom selected from N or O; R2 is (LQ)mY; and each R3 is independently H, C1-C10 alkyl, aryl or heteroaryl, are surprisingly found to be inhibitors of PI3K-p110?, and therefore have utility in therapy.

Abstract: Compounds of formula (I): wherein: W is O, N—H, N-alkyl, N-alkenyl, N-alkynyl, N-aryl, N-heteroaryl or S; each X is independently CH or N; R1 is formula (b) or R3 is H, alkyl, NH2, OH, =0 or halogen; each A and B are independently CH or N; D is NHR4; R4 is H, alkyl, —C(O)-alkyl.

Abstract: The subject application pertains to a compound of structure IX or X: or a pharmaceutically acceptable salt thereof, wherein: X is —C(?O)N(R10)— or —CH(OPr3) —; R7, R9 and R10 are the same or different and represent hydrogen or an amino acid side chain moiety from either a natural or an unnatural amino acid; Pr1 and Pr2 are the same or different and represent hydrogen or a thiol protecting group; Pr3 is hydrogen or an alcohol protecting group; R1, R2, R5 and R6 are the same or different and represent hydrogen or an amino acid side chain moiety from either a natural or an unnatural amino acid, or R1 and R2 and/or R5 and R6, taken together with the carbon atom to which they are attached, form a spirocyclic moiety, with the proviso that: each of R1 and R2 is not hydrogen, or each of R5 and R6 is not hydrogen.

Abstract: Compounds of formula (I) or a pharmaceutically acceptable salt thereof, wherein: W is O, N—H, N-(C1-C10 alkyl) or S; each X is independently CH or N; R1 is a 5 to 7-membered saturated or unsaturated, optionally substituted heterocycle containing at least 1 heteroatom selected from N or O; R2 is (LQ)mY; and each R3 is independently H, C1-C10 alkyl, aryl or heteroaryl, are surprisingly found to be inhibitors of PI3K-p110?, and therefore have utility in therapy.

Abstract: Compounds of formula (I): wherein: W is O, N—H, N-alkyl, N-alkenyl, N-alkynyl, N-aryl, N-heteroaryl or S; each X is independently CH or N; R1 is formula (b) or R3 is H, alkyl, NH2, OH, =0 or halogen; each A and B are independently CH or N; D is NHR4; R4 is H, alkyl, —C(O)— alkyl.

Abstract: A Compound of structure (IX) or (X) or a pharmaceutically acceptable salt thereof, wherein: X is —C(?O)N(R10)— or —CH(OPr3)—; R7, R9 and R10 are the same or different and represent hydrogen or an amino acid side chain moiety from either a natural or an unnatural amino acid; Pr1 and Pr2 are the same or different and represent hydrogen or a thiol protecting group; Pr3 is hydrogen or an alcohol protecting group; R1, R2, R5 and R6 are the same or different and represent hydrogen or an amino acid side chain moiety from either a natural or an unnatural amino acid, or R1 and R2 and/or R5 and R6, taken together with the carbon atom to which they are attached, form a spirocyclic moiety, with the proviso that: each of R1 and R2 is not hydrogen, or each of R5 and R6 is not hydrogen.