Stable and water soluble amino acid phosphomonoester amidates of AZT were s
ynthesized and shown to have potent anti-HIV-1 activity. Intracellular and
cell extract metabolism studies revealed that these compounds are likely to
be enzymatically converted to the corresponding monophosphates. In additio
n, we have shown that the half life and tissue distribution of a phosphoram
idate of AZT is 5 and 10-fold greater, respectively, than AZT.