Edoxaban dichloro pyridine impurity

Edoxaban dichloro pyridine impurity is a synthetic byproduct arising from the chlorination of the pyridine core during Edoxaban API synthesis. It features a 3,5-dichloro-substituted pyridine ring conjugated to an oxindole moiety and a sulfonamide group, retaining key pharmacophoric elements of the parent compound. The dichloro substitution introduces steric and electronic perturbations, altering its physicochemical properties relative to Edoxaban. This impurity serves as a critical HPLC reference standard for quantifying process-related impurities in Edoxaban formulations.