First Total Synthesis of a Naturally Occurring Iodinated 5′-Deoxyxylofuranosyl Marine Nucleoside
作者:Jianyun Sun、Yanhui Dou、Haixin Ding、Ruchun Yang、Qi Sun、Qiang Xiao
DOI:10.3390/md10040881
日期:——
4-Amino-7-(5′-deoxy-β-d-xylofuranosyl)-5-iodo-pyrrolo[2,3-d]pyrimidine 1, an unusual naturally occurring marine nucleoside isolated from an ascidan, Diplosoma sp., was synthesized from d-xylose in seven steps with 28% overall yield on 10 g scale. The key step was Vorbrüggen glycosylation of 5-iodo-pyrrolo[2,3-d]pyrimidine with 5-deoxy-1, 2-O-diacetyl-3-O-benzoyl-d-xylofuranose. Its absolute configuration was confirmed.
研究人员从蛔虫(Diplosoma sp.)中分离出了一种不寻常的天然海洋核苷--4-氨基-7-(5′-脱氧-β-d-羟基呋喃糖基)-5-碘吡咯并[2,3-d]嘧啶1,该核苷由d-木糖经7个步骤合成,10克的总收率为28%。关键步骤是 5-碘-吡咯并[2,3-d]嘧啶与 5-脱氧-1,2-O-二乙酰基-3-O-苯甲酰基-d-氧基呋喃糖的沃布吕根糖基化。其绝对构型已得到确认。