Patent ID: 8481535

Claim:
A process for preparing a compound of Formula (I): or a salt form thereof, wherein: R 1 is C 1 -C 8 alkyl, halo, C 1 -C 8 haloalkyl or C 1 -C 8 alkoxy; X is O, S, NR 2 or CHR 2 ; and R 2 is H, C 1 -C 8 alkyl, C 1 -C 8 acyl, C 1 -C 8 alkenyl, C 1 -C 8 alkynyl, C 3 -C 7 cycloalkyl, C 1 -C 8 haloalkyl, arylalkyl, aryl, heteroaryl or heteroarylalkyl each optionally substituted with C 1 -C 8 alkyl, halo, C 1 -C 8 haloalkyl or C 1 -C 8 alkoxy; comprising reacting a compound of Formula (II): with a compound of Formula (III): in the presence of a trisubstituted phosphine and a compound having the Formula (A): wherein: R a and R b are each, independently, C 1 -C 10 alkyl or C 1 -C 7 cycloalkyl; to form said compound of Formula (I).