absolute configuration of the attached aglycones. The concise set of data thus obtained also makes clear that the proposed structure of the fattiviracins, a seemingly closely related family of glycoconjugates, is not matched by the published data. Finally, the biological activity of synthetic 1 and some of the keyintermediates obtained en route to this natural product was investigated, showing that
Total Synthesis of the Antiviral Glycolipid Cycloviracin B<sub>1</sub>
作者:Alois Fürstner、Jacek Mlynarski、Martin Albert
DOI:10.1021/ja027346p
日期:2002.9.1
The first total synthesis of the antiviral agent cycloviracin B1 (1) is described which provisionally establishes the hitherto unknown configuration of the chiral centers on the lateral fatty acid chains as (3R,19S,25R,3'R,17'S,23'R). Key steps en route to this glycolipid include a highly efficient template-directed macrodilactonization step for the formation of the lactide core followed by a two-directional