Water → 7-Chloro-3-(4-ethoxy-2-fluorophenyl)-6-methoxy-1,2-benzisoxazole

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Reaction Steps

A solution of 23.3 g of Z-2,3-dichloro-4'-ethoxy-2'-fluoro-4-methoxybenzophenone oxime in 175 ml dimethylformamide is added to 1.85 g of sodium hydride in 35 ml of dimethylformamide. After stirring 30 min at room temperature, the reaction is worked up with water and 1:1 diethyl ether/2-butanone. Concentration of the dried organic phase, trituration of the product with hexane and recrystallization from toluene/hexane gives 7-chloro-3-(4-ethoxy-2-fluorophenyl)-6-methoxy-1,2-benzisoxazole, mp 151°-152° C.

Provenance & Evidence