Thionyl Chloride → 2-Chloro-6-(trifluoromethoxy)-1,3-benzothiazole

참여 물질

반응 조건

반응 단계

49.4 g of 2-hydrazino-6-trifluoromethoxybenzothiazole are added over one hour to 97.9 g of thionyl chloride heated to 50° C. The mixture is then heated for one hour at this same temperature and then cooled to 0° C. After addition of 200 g of an ice/water mixture (1/1 by weight), the precipitate is filtered off and washed with twice 50 cm3 of water. 54.5 g of 2-chloro-6-trifluoromethoxybenzothiazole are thus obtained, melting at 50° C.

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