Abstract
The preparation of 4′-t-butylcarbamyl-2′,3′-dideoxy thymidine, uridine and 5-ethyl uridine nucleoside analogues and 4′-p-toluenesulphonamidyl-2′,3′-dideoxy thymidine and 5-ethyl uridine nucleoside analogues from L-pyroglutamic acid is reported.