2-Bromo-1-[2-(trifluoromethyl)phenyl]ethan-1-one → (2E)-3-(2-propan-2-ylphenyl)-2-[(Z)-[4-[1-[4-(trifluoromethoxy)phenyl]-1,2,4-triazol-3-yl]phenyl]methylidenehydrazinylidene]-4-[2-(trifluoromethyl)phenyl]-1,3-thiazolidin-4-ol

Participants

Reaction Steps

A solution of (E)-N-(2-isopropylphenyl)-2-(4-(1-(4-(trifluoromethoxy)phenyl)-1H-1,2,4-triazol-3-yl)benzylidene)hydrazinecarbothioamide (0.30 g, 0.57 mmol) and 2-(trifluoromethyl)phenacyl bromide (0.22 g, 0.85 mmol) in DCE (30 mL) was heated to reflux and stirred overnight. The reaction mixture was cooled to room temperature, diluted with ethyl acetate (100 mL), washed with water (2×50 mL), washed with brine solution (1×25 mL), and dried over anhydrous sodium sulfate. The solution was filtered, the filtrate concentrated, and the residue purified by flash chromatography (0-100% ethyl acetate/hexanes) to provide (Z)-3-(2-isopropylphenyl)-2-((E)-(4-(1-(4-(trifluoromethoxy)-phenyl)-1H-1,2,4-triazol-3-yl)benzylidene)hydrazono)-4-(2-(trifluoromethyl)-phenyl)thiazolidin-4-ol as a yellow solid (0.15 g, 38% yield): mp 115-117.5° C.; 1H NMR (400 MHz, CDCl3) δ 8.59 (s, 1H), 8.33 (s, 1H), 8.24 (d, J=8.4 Hz, 2H), 8.13 (s, 1H), 7.86-7.77 (m, 5H), 7.73 (d, J=7.2 Hz, 1H), 7.62 (dt, J=21.6, 7.2 Hz, 2H), 7.40 (d, J=8.2 Hz, 2H), 7.37-7.28 (m, 3H), 7.24-7.17 (m, 1H), 4.34 (s, 2H), 3.20 (dt, J=13.7, 6.8 Hz, 2H), 1.25 (d, J=6.9 Hz, 6H); 19F NMR (376 MHz, CDCl3) δ −57.99, −58.02; ESIMS m/z 711 ([M+H]+).

Provenance & Evidence