| abstract |
Process for preparing 4-chloro-3-methyl-5- (2- (2- (6-methylbenzo [d] [1,3] dioxol-5-yl) acetyl) -3-thienylsulfonamido) isoxazole sodium salt (sodium sulfonamide) ) which comprises the following steps: (a) dissolving 4-chloro-3-methyl-5- (2- (2- (6-methylbenzo [d] [1,3] dioxol-5-yl) acetyl) -3- thienylsulfonamido) -isoxazole (free sulfonamide) in an organic solvent; (b) washing the dissolved free sulfonamide with a saturated sodium salt solution; and isolating said sulfonamide sodium salt or purifying after isolation. |