A series of alkyl-aryl, -phenoxy, and -thiophenoxy bicyclic furo pyrimidine
nucleosides have been successfully synthesised by Pd-coupling of 5-iodo-2'
-deoxyuridine (IDU) with terminal alkynes, followed by in situ copper-cycli
sation. Synthesised compounds (4a-i) showed an anti-VZV activity at low muM
concentration, comparable to that of current treatment acyclovir.