Abstract: A method of synthesising a compound of formula (I): (I) from a compound of formula (II): (II) where R8 is either: (i) ProtO3; or (ii) a group of formula (A1) in formula (I) and (A2) in formula (II): (A1), (A2).

Abstract: A method of synthesising a compound of formula (I): (I) from a compound of formula (II): (II) where R8 is either: (i) ProtO3; or (ii) a group of formula (A1) in formula (I) and (A2) in formula (II): (A1), (A2).

Abstract: A compound of the formula (1) or a pharmaceutically-acceptable salt, or pro-drug thereof; wherein, for example, Z is CH or nitrogen, R4 and R5 together are either —S—C(R6)?C(R7)— or —C(R7)?C(R6)—S—; R6 and R7 are independently selected from hydrogen, halo, nitro, cyano, hydroxy, fluoromethyl, difluoromethyl, trifluoromethyl, trifluoromethoxy, carboxy and carbamoyl; A is phenylene or heteroarylene; n is 0, 1 or 2; r is 1 or 2; R1 is halo, cyano or carboxy; Y is selected from —C(O)R2, —C(O)OR2, —C(O)NR2R3, -(1-4C)alkyl [optionally substituted] -(2-4C)alkenyl, —SO2NR2R3, and —S(O)cR2 (wherein c is 0, 1 or 2); R2 and R3 are independently selected from hydrogen, —O(1-4C)alkyl, —S(1-4C)alkyl, —N(1-4C)alkyl, heterocyclyl, aryl, and (1-4C)alkyl [optionally substituted]; possess glycogen phosphorylase inhibitory activity and accordingly have value in the treatment of disease states associated with increased glycogen phosphorylase activity.