Sulfonation method for zonisamide intermediate in zonisamide synthesis and their novel crystal forms

   
   

The present invention relates to a novel sulfonation of an intermediate of zonisamide. The sulfonation processes using chlorosulfonic acid as well as acetic anhydride and sulfuric acid in an organic solvent are disclosed. Crystalline forms of benzisoxazole methane sulfonic acid (BOS-H) and its salts (BOS-Na, BOS-Ca, and BOS-Ba) and their novel preparation processes are disclosed.

La présente invention concerne une sulfonation de roman d'une intermédiaire de zonisamide. La sulfonation traite en utilisant l'acide chlorosulfonique comme l'anhydride acétique et l'acide sulfurique dans un dissolvant organique sont révélés. Des formes cristallines d'acide sulfonique de méthane de benzisoxazole (SOTTISES) et ses sels (BOS-Na, BOS-CA, et BOS-Ba) et leurs procédés de préparation de roman sont révélées.

 
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