Dihydro-5-azathymidine [l-(2-deoxy-~-~-ribofuranosyl)-5, 6-dihydro-5-methyl-s-triazine-2, 4 (1~, 3~)~ dione], isolated from Streptomyces platensis, exhibits interesting antibacterial and antiviral properties. As a means of preparing several analogues of this new nucleoside, a synthetic route to the 2, 2'-anhydronucleoside analogue was accomplishlzd. The aminooxazoline of arabinose was exploited in a preparation of both possible isomeric ...