4-(3′-methylphenyl)amino-3-pyridinesulfonamide

It is a pyridinesulfonamide derivative used to form the core structure of the final drug. 4-(3′-methylphenyl)amino-3-pyridinesulfonamide, often referred to as Torsemide Impurity B or 4-m-tolylamino-3-pyridinesulfonamide, acts as a crucial intermediate in the industrial synthesis of Torasemide (or Torsemide), a potent loop diuretic.

API Name Torasemide
CAS No 72811-73-5
Molecular Formula C12H13N3O2S
Molecular Weight 263.32 g/mol
Synonyms 4-(3-methylanilino)pyridine-3-sulfonamide

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