Step 2: Chlorosulfonic
anhydride
reacts with acetanilide via and electrophilic aromatic
substitution to
generate p-acetamidobenzenesulfonylchloride.
Step 3:
p-Acetamidobenzenesulfonyl
chloride reacts with ammonia to generate
p-acetamidobenzenesulfonamide.
Step 4: The amide
group of
p-acetamidobenzenesulfonamide is hydrolyzed in aqueous
acid.