Abstract

SYNTHESIS AND CHARACTERIZATION OF IMPURITY F IN 4-AMINO-N-(5-METHYL ISOXAZOL-3-YL) BENZENE SULFONAMIDE DRUG SYNTHESIS

M. Mamatha*, Narendra Babu, K. Kiran and H. Mastan

ABSTRACT

4-amino-N-(5-methylisoxazol-3-yl) benzenesulfonamide (API) has a great therapeutical value and acts as a good active pharmaceutical ingredient. However 4-amino-N-(3-methylisoxazol-5-yl) benzenesulfonamide (impurity F) has been identified in its synthesis in very minute quantities. Here in this paper, we present synthesis and characterization of this impurity so that its identification in API synthesis is made easy.

Keywords: Cyanoacetic acid, Hydroxylammoniumsulphate, Impurity F, Coupling, Hydrolysis.