3,5-Dichlorosalicylaldehyde → 3-Trifluoromethoxy-benzoic acid [1-(3,5-dichloro-2-hydroxy-phenyl)-methylidene]-hydrazide

Participants

Reaction Conditions

Reaction Steps

A suspension of 3,5-dichloro-2-hydroxy-benzaldehyde (0.200, 1.05 mmol) and 3-trifluoromethoxy-benzoic acid hydrazide (0.243 g, 1.05 mmol) in ethanol (3.3 mL) was heated to 60° C. for 18 hours. The reaction mixture was cooled to room temperature to precipitate the product. The solid was collected via suction filtration and rinsed with ethanol to furnish 3-trifluoromethoxy-benzoic acid [1-(3,5-dichloro-2-hydroxy-phenyl)-methylidene]-hydrazide as an off-white solid (0.412 g, 99%): mp 180-182° C.; 1H NMR (400 MHz, DMSO) δ 12.63 (s, 1H), 12.39 (s, 1H), 8.60 (s, 1H), 8.01 (d, J=7.6 Hz, 1H), 7.91 (s, 1H), 7.76-7.63 (m, 4H); ESIMS m/z 393 ([M+H]+), 391 ([M−H]−).

Provenance & Evidence