The Pronucleotide Approach. III. Synthesis, Anti-HBV Activity and Stability Studies of the Bis(S-pivaloyl-2-thioethyl) Phosphotriester Derivative of Acyclovir

Abstract
The nucleoside analog Acyclovir (ACV) is used in the treatment of herpes simplex (HSV) and varicella-zoster (VZV) diseases. The possibility to extend the application field of ACV by using the bis[SATE] pronucleotide approach in order to deliver ACVMP inside the cell was investigated. And actually, the title compound has potent anti-hepatitis B activity in cell culture experiments. Here, we also report its synthesis and stability in various media.