FC(F)(F)C(O)=O.[CH3:8][CH:9]1[CH:22]=[C:21]([CH:23]=[CH:24][C:25]#[N:26])[CH:20]=[C:19]([CH3:27])[C:10]1(C(O)=O)CNC1C=CC=CC=1.[NH3:31]>O>[CH3:8][C:9]1[CH:22]=[C:21]([CH:23]=[CH:24][C:25]#[N:26])[CH:20]=[C:19]([CH3:27])[C:10]=1[NH2:31]Trifluoroacetic acid (600 ml) was slowly added to the residue of 2,6-dimethyl-4-(2-cyanoethenyl)-1-carboxybenzyl phenylamine obtained from example 2 (161 gms) at 25 to 30° C. and the reaction mass was stirred at 45-60° C. till completion of reaction as monitored by TLC. After completion of the reaction, water (1800 ml) was added to the reaction mass, neutralized with aqueous ammonia and extracted with toluene. The organic layer was separated and concentrated to give 2,6-dimethyl-4-(2-cyanoethenyl)phenylamine. The residue was admixed with 1:1 mixture of isopropanol and diisopropyl ether (1000 ml) and treated with HCl dissolved in isopropanol to yield 2,6-dimethyl-4-(2-cyanoethenyl)phenylamine hydrochloride salt (II) which was cooled to 25-30° C., filtered and dried.
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