Patent ID: 7094909

Claim:
A process for preparing a compound of formula (I-H), or a prodrug, or pharmaceutically active salt or solvate thereof, wherein: R 1 is a 5- or 6-membered mono-cyclic carbocyclic or heterocyclic group, wherein said carbocyclic or heterocyclic group is saturated, partially unsaturated or fully unsaturated and is optionally substituted by at least one substituent chosen from C 1-6 alkyl, hydroxyl, C 1-6 alkylcarbonyloxy, C 6-10 arylcarbonyloxy, and heteroarylcarbonyloxy; R 2 is C 1-6 alkyl substituted with at least one halogen; and R 4 , R 5 , R 6 and R 7 are independently chosen from H and C 1 –C 6 alkyl; comprising: reacting a compound of formula (II), wherein Y 1 is hydroxyl or a leaving group, with a compound of formula (III), or a salt or solvate thereof,