抄録
Treatment of 2'-O-tosyl-5'-O-trityluridine (I), 2'-O-tosyluridine (II), or 2', 3'-di-O-tosyluridine (XI) with various alkali chlorides or bromides afforded only 2'-halogenonucleosides, whereas in the reaction of alkali iodides with I or II were isolated 2, 2'-anhydronucleosides accompanied with 2'-deoxy-2'-iodouridine derivatives. And in the reaction of XI with sodium iodide in DMF only 2, 2'-anhydro-1-(3'-O-tosyl-β-D-arabinofuranosyl)-uracil (XIII) was obtained.
