A convenient synthesis of 9-(2-hydroxyethoxymethyl)guanine(acyclovir) and related compounds.

Abstract
A convenient and economical synthesis of 9-(2-hydroxyethoxymethyl)guanine (1, acyclovir, Zovirax, or acyclic guanosine: an antiherpetic agent) from guanine was developed via N2,O-diacetylacyclovir. Two closely related compounds, N2-acetylacyclovir (7) and O-acetylacyclovir (8), were also prepared by selective deacetylation.