Application of Isothiazole-3-carboxylic acid

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A common heterocyclic compound, the benzoxazole compound, name is 2-Benzoxazolinone,cas is 59-49-4, mainly used in chemical industry, its synthesis route is as follows.,59-49-4

To a mixture of 3H-benzooxazol-2-one (20 g, 0.15 mol) in DCM (500 mL) was added bromine (8.34 mL, 0.16 mol). After stirring at room temperature for 19.5 h, the orange precipitate that had formed was filtered off and washed with DCM until the orange color was washed out. The filtrate was concentrated to approximately 33% of its original volume and filtered and washed as before. The combined solids weighed 28.36 g and contained ca. 8-9% starting material.

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Reference£º
Patent; AVENTIS PHARMACEUTICALS INC.; WO2006/86705; (2006); A1;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem