Reaction Steps
To (E)-N-(2-isopropylphenyl)-2-(4-(1-(4-(trifluoromethyl)phenyl)-1H-1,2,4-triazol-3-yl)benzylidene)hydrazinecarbothioamide (200 mg, 0.393 mmol) and potassium carbonate (217 mg, 1.57 mmol) in butanone (10 ml) in a 25 mL vial equipped with a stir bar and vigruex column was added 1-bromo-3-chloropropane (0.047 ml, 0.472 mmol). The reaction was heated to 60° C. overnight. The reaction was determined to be complete by LCMS. The reaction mixture was diluted with DCM and washed with water. The aqueous layer was extracted with DCM. The organic layers were poured through a phase separator and concentrated. Purification by flash column chromatography provided two compounds. The minor compound was dried overnight under house vacuum providing the title compound 87C (2Z,NE)-2-((2-isopropylphenyl)imino)-N-(4-(1-(4-(trifluoromethyl)phenyl)-1H-1,2,4-triazol-3-yl)benzylidene)-1,3-thiazinan-3-amine (28.5 mg, 13%) as a yellow solid: mp 187-189° C.; 1H NMR (400 MHz, CDCl3) δ 8.81 (s, 1H), 8.66 (s, 1H), 8.21 (d, J=8.3 Hz, 2H), 7.92 (d, J=8.4 Hz, 2H), 7.81 (t, J=10.2 Hz, 4H), 7.30-7.26 (m, 2H), 7.17-7.04 (m, 1H), 6.83 (d, J=6.4 Hz, 1H), 3.96 (t, J=6.1 Hz, 2H), 3.13 (heptet, J=6.9 Hz, 1H), 2.97-2.90 (m, 2H), 2.47-2.38 (m, 2H), 1.25 (d, J=7.5 Hz, 6H); ESIMS m/z 550 (M+H). The major compound was recrystallized with MeOH. The solid was filtered, washed with MeOH and dried at 50° C. under vacuum. The solid was then azeotroped with acetone (3×) and the resultant solid was dried at 50° C. under vacuum providing the title compound 179C (Z)-3-(2-isopropylphenyl)-2-((E)-(4-(1-(4-(trifluoromethyl)phenyl)-1H-1,2,4-triazol-3-yl)benzylidene)hydrazono)-1,3-thiazinane as a yellow solid (92.3 mg, 0.168 mmol, 43%): mp 212-213° C.; 1H NMR (400 MHz, CDCl3) δ 8.64 (s, 1H), 8.15 (d, J=8.4 Hz, 2H), 8.06 (s, 1H), 7.91 (d, J=8.5 Hz, 2H), 7.79 (d, J=8.6 Hz, 2H), 7.75 (d, J=8.4 Hz, 2H), 7.38 (dd, J=7.8, 1.6 Hz, 1H), 7.33 (td, J=7.5, 1.4 Hz, 1H), 7.29-7.23 (m, 1H), 7.18 (dd, J=7.8, 1.4 Hz, 1H), 3.78-3.72 (m, 1H), 3.59-3.48 (m, 1H), 3.18-3.04 (m, 3H), 2.40-2.30 (m, 2H), 1.26-1.20 (m, 6H); ESIMS m/z 550 (M+H).
