Dimethylformamide → HCID 13669280, compound

Participants

Reaction Steps

A 1 L four-neck flask equipped with a stirrer, a thermometer and a condenser tube was charged with 90.6 g (0.5 mol) of 6-methoxy-1,2-benzisothiazol-3-one, 109.6 g (1.5 mol) of N,N-dimethylformamide and 150.0 g of chlorobenzene. While stirring, 89.2 g (0.75 mol) of thionyl chloride was added dropwise thereto at 80° to 90° C. over 1 hour, and the mixture was reacted at the same temperature for 5 hours. After terminating the reaction, the liquid reaction mixture was concentrated, and a crude product obtained was recrystallized from cyclohexane to give 86.9 g (0.44 mol) of 3-chloro-6-methoxy-1,2-benzisothiazole. The yield based on 6-methoxy-1,2-benzisothiazol-3-one was 87%.

Provenance & Evidence