作者:Barbara Raffaelli、Monika Pohjoispää、Tapio Hase、Christine J. Cardin、Yu Gan、Kristiina Wähälä
DOI:10.1039/b801593g
日期:——
Various conflicting data on the rearrangement and absolute stereochemistry of hydroxylignano-9,7'-lactones are resolved using 18O labeled compounds, also confirmed by an X-ray analysis of a pure lignano-9,7'-lactone enantiomer, obtained for the first time. Under NaH/DMF rearrangement conditions a silyl protected hydroxylignano-9,9'-lactone underwent an unexpected silyl migration.
使用18O标记的化合物可解决有关羟基木质素9,7'-内酯重排和绝对立体化学的各种相互矛盾的数据,这也通过对首次获得的纯木质素9,7'-内酯对映异构体进行X射线分析得到了证实。时间。在NaH / DMF重排条件下,甲硅烷基保护的羟基木香9,9'-内酯发生了意外的甲硅烷基迁移。