81534-20-5Relevant articles and documents
PURE 1,2-BENZISOXAZOLE-3-METHANE-SULFONIC ACID SODIUM SALT AND PURIFICATION PROCESS
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Page/Page column 14, (2008/06/13)
The present invention provides chemically pure sodium salt of 1,2-benzisoxazofe-3-methane-sulfonic acid, the sodium salt of 1,2-benzisoxazole-3-methane-sulfonic acid of high assay, or chemically pure sodium salt of 1,2-benzisoxazole-3-methane-sulfonic acid of high assay, and processes for preparing the same via purification. The present invention also provides monohydrate form of the chemically pure sodium salt of 1,2-benzisoxazole-3-methane-sulfonic acid, the sodium salt of 1,2-benzisoxazole-3-methane-sulfonic acid of high assay, or chemically pure sodium salt of 1,2-benzisoxazole-3-methane-sulfonic acid of high assay. Furthermore, the present invention provides anhydrous form of the chemically pure sodium salt of 1,2-benzisoxazole-3-methane-sulfonic acid, the sodium salt of 1,2-benzisoxazole-3-methane-sulfonic acid of high assay, or chemically pure sodium salt of 1,2-benzisoxazole-3-methane-sulfonic acid of high assay. One of the embodiments of the present invention is directed to a process for preparing zonisamide using the chemically pure sodium salt of 1,2-benzisoxazole-3-methane-sulfonic acid, the sodium salt of 1,2-benzisoxazole-3- methane-sulfonic acid of high assay, or chemically pure sodium salt of 1,2-benzisoxazole-3-methane-sulfonic acid of high assay.