2-Hydroxybenzenesulfonamides were prepared in good yield from 2-acetoxyphenyl-sulfonylchlorides via N-acetyl-2-hydroxybenzenesulfonamides, followed by hydrolysis. The preparations of 2-alkyl, aryl, benzyl, or substituted amino-1, 4, 3-benzoxathiazine-4, 4-dioxides were described. Further 2-methyl-, or benzyl-2, 3-dihydro-1, 4, 3-benzoxathiazine-4, 4-dioxide was also prepared.
