Phosphoramidate conjugates of 3′-azido-3′-deoxythymidine glycerolipid derivatives and amino acid esters: synthesis and anti-HIV activity

We report the synthesis of phosphoramidate conjugates of 3′-azido-3′-deoxythymidine (AZT) glycerolipid derivatives and amino acid esters. For the synthesized compounds, 50% inhibition of the HIV-1 MvP-899 strain in human T lymphoid MT-4 cells is achieved at concentrations of 0.014–0.356 µM. Significantly, compound 3c (which contained ethyl ester of α-alanine) was found to be the most active with EC 50 value 0.014 µM. We show that, among these glycerolipid derivatives of AZT, some compounds are less toxic than AZT, and also they possess a similar or higher selectivity index compared to AZT (SI = 11643).