Carbon Tetrachloride → 2-Acetylamino-5-[2,2-dichloro-1-(ethoxycarbonyl-hydrazono)-ethyl]-4-trifluoromethyl-benzoic acid methyl ester

Participants

Reaction Conditions

Reaction Steps

To a solution of 2-acetylamino-5-[1-(ethoxycarbonyl-hydrazono)-ethyl]-4-trifluoromethyl-benzoic acid methyl ester (1.1 g, 2.83 mmol) in CCl4 (18 mL) was added N-chlorosuccinimide (770 mg, 5.65 mmol). The reaction vessel was flushed with argon and the reaction mixture was heated to 110° C. for 38 h. After cooling to r.t., the mixture was filtered and the filtrate was concentrated in vacuo to provide the intermediate 2-acetylamino-5-[2,2-dichloro-1-(ethoxycarbonyl-hydrazono)-ethyl]-4-trifluoromethyl-benzoic acid methyl ester which was used directly in the next step. (API-ES: m/z 455.9 [M−H]−, rt 5.04 min).

Provenance & Evidence