Chemistry of (+)-aromadendrene. Part 6: Rearrangement reactions of ledene, isoledene and their epoxides
作者:F.Javier Moreno-Dorado、Yvonne M.A.W Lamers、Grigore Mironov、Joannes B.P.A Wijnberg、Aede de Groot
DOI:10.1016/s0040-4020(03)01231-6
日期:2003.9
(−)-isoledene, both easily available from (+)-aromadendrene has been investigated. Reactions at the double bond of ledene take place preferably from the β-side. Under acidic conditions its C7–C8 β-epoxide and β-diol preferably react via carbocations, which are initially formed at C8. Rearrangement takes place to compounds with cubebane and cadinane skeletons. The reaction pattern of isoledene and its α-epoxide
chiral precursor guaiol. The absolute configuration of oxyfungiformin was established by a combination of X-ray analysis and comparison of the values for specific optical rotation. Oxyfungiformin and a diastereoisomer showed cytotoxic activity in a panel of human cancer cell models.
以从手性前体愈创木酚开始的简明合成序列获得海洋倍半萜类氧化真菌菌素。通过 X 射线分析和比旋光度值的比较相结合,确定了 oxyfungiformin 的绝对构型。Oxyfungiformin 和一种非对映异构体在一组人类癌细胞模型中显示出细胞毒活性。