Abstract
Treatment of 2,5''-anhydro-3''-O-acetyl-2''-O-triflyluridine with a nucleophile such as NaOAc, NaN3, LiCl or LiBr, did not afford the 2''-substituted 2,5''-anhydro-arabinosyluracil, but gave 2,2''-anhydro-1-(5-substituted-.beta.-D-arabinofuranosyl)uracil instead.

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