A novel stereospecific radical cyclization of 2′,3′-O-isopropylideneuridine and -adenosine 5′-aldehyde to the corresponding 6,5′-cyclodihydrouridine and 8,5′-cycloadenosine derivatives
作者:Tomokazu Sugawara、Brian A. Otter、Tohru Ueda
DOI:10.1016/0040-4039(88)80020-0
日期:1988.1
Treatment of 2′,3′-O-isopropylideneuridine5′-aldehyde with tributyltin hydride in the presence of azobisisobutyronitrile affords (6S,5′S)-6,5′-cyclo-5,6-dihydro-2′,3′-O-isopropylideneuridine in a stereospecific manner. A similar reaction with N6-benzoyl-2′,3′-O-isopropylideneadenosine 5′-aldehyde leads to the corresponding8,5′-cycloadenosine.