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-isopropylideneuridine 5′-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 corresponding 8,5′-cycloadenosine.
在偶氮二异丁腈存在下,用氢化三丁基锡处理2',3'-O-异丙基亚氨基尿嘧啶5'-醛,得到(6S,5'S)-6,5'-cyclo-5,6-dihydro-2',3' -O-异亚丙基亚尿苷以立体有择的方式。与N 6-苯甲酰基-2',3'-O-异丙基亚氨腺苷5'-醛的类似反应产生相应的8,5'-环腺苷。