Process

A compound of Formula (IV):

• wherein:
• R2 represents hydrogen or C1-6alkyl;
• R3 represents hydrogen or C1-6alkyl;
• L represents a leaving group;
• R4 represents a group (W):
• wherein A represents an aryl, pyridine, thiophene or furan;
• R5 represents cyano, tetrazol-5-yl or —CO2R8;
• R6 and R7 independently represent hydrogen, C1-6alkyl, —CO2R8, cyano, tetrazol-5-yl, halogen, trifluoromethyl or C1-6 alkoxy, or when R6 and R7 are bonded to adjacent carbon atoms, R6 and R7 may, together with the carbon atoms to which they are bonded, form a fused 5- or 6-membered ring optionally containing one or two nitrogen, oxygen or sulfur atoms;
• each R12 independently represents substituents selected from:
• C1-6alkyl, halogen, trifluoromethyl and C1-6alkoxy, and n represents an integer from 0-4;
• R8 and R9 independently represent C1-6alkyl;
• and
• R11 represents C1-6alkyl or aryl optionally substituted by C1-6alkyl or halogen.