Abstract 1-Azidopropane-2, 3-diol (IIb) reacts with p-toluenesulfonyl chloride to give the tosyl derivative IIIa which, on acid catalyzed condensation with 2, 3-dihydropyran, afforded 1- azido-2-(tetrahydropyran-2-yloxy-3-(p-toluenesulfonyloxy) propane (IIIb). Treatment of adenine sodium salt with IIIb resulted in the intermediate IV which was transformed by acid hydrolysis to 9-(RS)-(3-azido-2-hydroxypropyl) adenine (V). Catalytic hydrogenation of V ...