Atazanavir benzylidenehydrazine carbamate

Atazanavir benzylidenehydrazine carbamate is a structurally related impurity derived from the antiretroviral drug Atazanavir, featuring a benzylidenehydrazine moiety linked via a carbamate ester to the core naphthyridine-cyclohexene scaffold. The compound incorporates a hydrazine bridge connecting the benzaldehyde-derived benzylidene group to a carbamate-functionalized side chain, introducing steric and electronic deviations from the parent molecule. This impurity likely arises during synthetic steps involving hydrazine-mediated coupling or carbamate protection. It serves as a critical HPLC reference standard for quantifying process-derived impurities in Atazanavir drug substance characterization.