vortioxetine 2[(2,6-dimethyl phenyl)sufanyl ]aniline

Vortioxetine 2[(2,6-dimethylphenyl)sulfanyl]aniline is a sulfur-bridged aniline derivative featuring a 2,6-dimethylphenyl substituent linked via a sulfanyl group to the aniline core. This impurity arises from nucleophilic aromatic substitution during vortioxetine synthesis, retaining the parent drug's aniline scaffold but incorporating a sterically hindered, electron-rich aryl sulfide moiety. The 2,6-dimethyl substitution on the phenyl ring enhances lipophilicity and metabolic resistance compared to the parent compound. This impurity serves as a critical HPLC reference standard for quantifying process-related impurities in vortioxetine active pharmaceutical ingredient batches.