反应详情

From the monochlorobenzene layer obtained by the same procedures as in Example 1, 2-(methylthio)benzaldehyde oxime was isolated in the same manner as in Example 2. 39.7 g of the oxime isolated was dissolved in 150 g of monochlorobenzene. Then, the oxime was cyclized in the same manner as in Example 1 except that chlorine was changed to 35.3 g (0.26 mol) of sulfuryl chloride. As a result, 32.7 g of 1,2-benzisothiazol-3-one was obtained. The yield against 2-(methylthio)benzaldehyde oxime was 91%.