Synthesis of 3′-azido-4′-ethynyl-3′,5′-dideoxy-5′-norarabinouridine: a new anti-HIV nucleoside analogue
摘要:
3'-Azido-4'-ethynyl-3',5'dideoxy-5'-norarabinouridine 10 was synthesized from commercial uridine 1 in which the key step is the opening of protected 2',3'-epoxyuridine derivative 7 by sodium azide and the hydroxymethyl at 4-position of the ribose ring are replaced by ethynyl group. (C) 2010 Elsevier Ltd. All rights reserved.
An improved procedure is reported for the asymmetric synthesis of uracil polyoxinC (UPOC) from 2′,3′-O-isopropylideneuridine-5′-aldehyde. The methodology described here is based on the highly diastereocontrolled formation of 1-(β-D-allofuranosyl)uracil and its facile conversion into the corresponding 2,5′-O-cyclouridine derivative, a key step for the sterocontrolled formation of the terminal α-amino