[F:1][C:2]([F:10])([CH:7]([F:9])[F:8])[CH2:3][N:4]=[C:5]=S.C1(=O)[N:15]([CH2:16][CH2:17][CH2:18][S:19][C:20]2[N:25]=[C:24]([NH2:26])[CH:23]=[CH:22][N:21]=2)C(=O)C2=CC=CC=C12.C(#[N:35])C>CN(C)C=O.N>[F:1][C:2]([F:10])([CH:7]([F:9])[F:8])[CH2:3][N:4]=[C:5]([NH2:35])[NH:26][C:24]1[CH:23]=[CH:22][N:21]=[C:20]([S:19][CH2:18][CH2:17][CH2:16][NH2:15])[N:25]=12,2,3,3-Tetrafluoropropylisothiocyanate (0.9 g.) and 2-(3-phthalimidopropylthio)-4-aminopyrimidine (0.9 g.) were dissolved in acetonitrile (30 ml.) and heated under reflux for 64 hours. The resulting suspension was cooled, filtered and the collected solid washed with acetonitrile (10 ml.) to give a white solid (0.9 g.). This was dissolved in a mixture of dimethylformamide (10 ml.) and saturated ethanolic ammonia solution (5 ml.) and treated with yellow mercuric oxide (0.8 g.). The mixture was stirred at room temperature for 3 hours. The solvent was evaporated and the black residue was triturated with ethyl acetate and filtered. The solvent was evaporated and the residual gum was dissolved in ethanol (15 ml.) and added to a solution of hydrazine (5 ml.) in ethanol (10 ml.). The mixture was stirred at room temperature for 2 hours then the solvent was evaporated. The residue was triturated with 1N hydrochloric acid, filtered and the filtrate was basified with 10N sodium hydroxide solution. The product was extracted with ethyl acetate, dried (magnesium sulphate) and the solvent was evaporated to give 4-[2-(2,2,3,3-tetrafluoropropyl)guanidino]-2-[3-aminopropylthio]pyrimidine (0.5 g.) which was used without further purification.
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