Abstract
This paper describes the synthesis of 8,2 -anhydro-8-mercapto-9-(β-D-arabinofuranosyl)purine (8,2′-S-cyclopurinenucleoside, 1) via the shorter route from 3′,5′-di-O-acectyl-8,2′-S-cycloadenosine (6) and by direct reductive deamination with n- pentyl nitrite in tetrahydrofuran (THF) and deacetylation. The preparation of 8,2′-S-cycloadenosine (2) was achieved in good yield by the cyclization of the protected 8-mercaptoadenosine with triphenylphosphine and diethyl azodicarboxylate (DEAD) in THF at room temperature, under Mitsunobu reaction conditions.
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