Methyldithiocarbazate → methyl N-[(E)-[4-[1-[4-(trifluoromethoxy)phenyl]-1,2,4-triazol-3-yl]phenyl]methylideneamino]carbamodithioate

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To a 250 mL round-bottom flask containing hydrazinecarbodithioic acid methyl ester (2.38 g, 1.95 mmol) in EtOH (100 mL) was added 4-[1-(4-trifluoromethoxyphenyl)-1H-[1,2,4]triazol-3-yl]-benzaldehyde (5.00 g, 1.50 mmol). The vessel was heated at 80° C. for 3 h before being diluted with H2O (300 mL) and cooled to 0° C. The precipitated product was collected by vacuum filtration as an off-white solid (6.13 g, 93%) mp 204-206° C.; 1H NMR (400 MHz, DMSO-d6) δ 13.39 (s, 1H), 9.43 (s, 1H), 8.38 (s, 1H), 8.21 (d, J=8.3 Hz, 2H), 8.09 (d, J=8.4 Hz, 2H), 7.88 (d, J=8.4 Hz, 2H), 7.62 (d, J=8.3 Hz, 2H), 2.57 (s, 3H); ESIMS m/z 438 (M+H).

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