A General Entry to Antifeedant Sesterterpenoids: Total Synthesis of (+)-Norleucosceptroid A, (−)-Norleucosceptroid B, and (−)-Leucosceptroid K
作者:Cedric L. Hugelshofer、Thomas Magauer
DOI:10.1002/anie.201407788
日期:2014.10.13
The first asymmetric total synthesis of the antifeedant terpenoids (+)‐norleucosceptroid A, (−)‐norleucosceptroid B, and (−)‐leucosceptroid K has been accomplished. This highly concise synthetic route was guided by our efforts to develop a platform for the collective synthesis of a whole family of antifeedant natural products. The synthesis features a Hauser–Kraus‐type annulation followed by an unprecedented
已经完成了拒食性萜类化合物(+)-降糖类固醇A,(-)-降糖类固醇B和(-)-亮糖类固醇K的第一个不对称全合成。这种高度简洁的合成路线是在我们努力开发平台的基础上进行的,该平台用于整个反饲料天然产物家族的集体合成。合成过程具有Hauser–Kraus型环化反应,随后进行了前所未有的,高效的分子内Dilactol aldol型缩合反应,生成了5,6,5骨架。已开发出的合成路线是从已知化合物中以16个步骤(最长的线性序列)进行的正甲类甾体A和B的合成。