Synthesis of 6-Substituted Purine 2′-Azido- and 3′-Azido-Deoxypentopyranoses

Abstract
Various 6-substituted purine 3′-(2′-) azido-3′, 4′-(2′, 4′-) dideoxy-β-DL-erythro-pentopyranoses (1) (2) have been prepared and compared in terms of a substituent electronegativity parameter. The nucleoside 1a (R=NH2) is a good competitive inhibitor of adenosine deaminase.