Edoxaban BOCpyridine amide impurity(RRS, diasteriomer)

Edoxaban BOCpyridine amide impurity (RRS, diastereomer) is a stereoisomeric byproduct arising from the chiral synthesis of edoxaban, featuring a tert-butyloxycarbonyl (BOC)-protected pyridine amide moiety with distinct stereochemistry at the RRS configuration. This diastereomer diverges from the parent compound through spatial arrangement of substituents on adjacent chiral centers, leading to altered H-bonding and steric interactions. It serves as a critical HPLC reference standard for quantifying diastereomeric impurities in edoxaban active pharmaceutical ingredient (API) batches.