Patent ID: 7973165

Claim:
A process for preparing a compound of formula IA which process comprises reacting a compound of formula IX with dimethyl (1-diazo-2-oxopropyl)phosphonate to form a compound of formula IV; and reacting a compound of formula IV, with a compound of formula V, wherein, R 1 is halogen or cyano; R 2 is lower alkyl; R 3 is selected from the group consisting of: aryl, pyridinyl, pyrimidinyl, and pyrazinyl each of which is optionally substituted by one, two or three halogen, R is selected from the group consisting of: hydrogen, lower alkyl, cycloalkyl, and —CH 2 -cycloalkyl; and R′ and R″ are each independently selected from the group consisting of: hydrogen, lower alkyl, cycloalkyl, —CH 2 -cycloalkyl, and —(CH 2 ) n OR, wherein n is 1 or 2.