Edoxaban BOC amino amide impurity(RRS, diasteriomer)

Edoxaban BOC amino amide impurity (RRS, diastereomer) is a stereoisomeric byproduct arising from the stereoselective synthesis of Edoxaban, featuring a tert-butyloxycarbonyl (BOC)-protected amino group and an amide linkage at the pyridine-3-yl position. The compound exhibits distinct stereochemistry at the chiral center relative to the parent drug, resulting in altered conformational flexibility and hydrogen bonding capacity. This diastereomer is generated during amidation steps due to partial racemization or asymmetric catalyst inefficiency. It serves as a critical HPLC reference standard for quantifying stereoisomeric impurities in Edoxaban active pharmaceutical ingredient (API) batches.