1,2-Dibromopropane → (Z)-4-methyl-3-(2-propan-2-ylphenyl)-N-[(Z)-[4-[1-[4-(trifluoromethoxy)phenyl]-1,2,4-triazol-3-yl]phenyl]methylideneamino]-1,3-thiazolidin-2-imine

Participants

Reaction Conditions

Reaction Steps

To (E)-N-(2-isopropylphenyl)-2-(4-(1-(4-(trifluoromethoxy)phenyl)-1H-1,2,4-triazol-3-yl)benzylidene)hydrazinecarbothioamide (300 mg, 0.572 mmol) and potassium carbonate (316 mg, 2.29 mmol) in butanone (4 ml) was added 1,2-dibromopropane (0.072 ml, 0.686 mmol). The reaction was heated to 85° 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 a yellow solid. The solid was recrystallized from MeOH. The solid was filtered, washed with MeOH, and dried to provide the title compound as a yellow solid which was dissolved in acetone and concentrated (3×). The light yellow solid was collected and dried under to provide the title compound as a 1:1 mixture of rotational diastereoisomers (75.1 mg, 0.133 mmol, 23%): mp 201-204° C.; 1H NMR of mixture (400 MHz, CDCl3) δ 8.56 (s, 2H), 8.18 (dd, J=10.8, 7.4 Hz, 6H), 7.84-7.73 (m, 8H), 7.45-7.30 (m, 8H), 7.30-7.23 (m, 2H), 7.20 (d, J=6.7 Hz, 1H), 7.12 (dd, J=7.8, 1.2 Hz, 1H), 4.43-4.33 (m, 1H), 4.16 (dd, J=12.6, 6.3 Hz, 1H), 3.48 (dt, J=13.3, 6.7 Hz, 1H), 3.37 (dd, J=10.8, 6.2 Hz, 1H), 3.24 (dt, J=13.7, 6.9 Hz, 1H), 3.08-2.92 (m, 3H), 1.33-1.16 (m, 18H); ESIMS m/z 566 (M+H).

Provenance & Evidence