Patent ID: 6891065

Claim:
A process for making a compound of formula (I) wherein: n is an integer in the range of 0-10; R 1 represents a straight or branched C 1 -C 10 alkyl group or —CH 2 -phenyl wherein the phenyl optionally has up to two substituents independently selected from the group consisting of C 1 -C 4 alkyl, C 1 -C 4 alkoxy, halogen, and nitrile, each alkyl and alkoxy being optionally substituted by from one to the maximum number of halogen atoms; R 2 and R 3 are each independently selected from the group consisting of H, halogen, nitrile, C 1 -C 4 alkyl, and C 1 -C 4 alkoxy; and R 4 represents a straight or branched C 1 -C 10 alkyl group, wherein R 2a , and R 3a are each independently selected from the group consisting of H, halogen, nitrile, C 1 -C 4 alkyl, and C 1 -C 4 alkoxy, said process comprising: a) reacting the compound R 1 —SO 2 Cl with the compound HC═C—(CH 2 ) n —NH 2 or a salt form thereof, where n represents an integer from 0-10, under alkaline conditions to produce the intermediate compound of formula (II) and then; b) reacting the compound of formula (II) with the compound of formula