作者:Michael C. McLeod、Zoe E. Wilson、Margaret A. Brimble
DOI:10.1021/jo201988m
日期:2012.1.6
The full details of our enantioselective formal synthesis of the biologically active natural product berkelic acid are described. The insertion of the C-18 methyl group proved challenging, with three different approaches investigated to install the correct stereochemistry. Our initial Horner–Wadsworth–Emmons/oxa-Michael approach to the berkelic acid core proved unsuccessful upon translation to the
描述了我们的对映选择性形式合成的生物活性天然产物伯酸的完整细节。C-18甲基的插入被证明具有挑战性,已研究了三种不同的方法来安装正确的立体化学。我们最初对Berkelic酸核心的Horner–Wadsworth–Emmons / oxa-Michael方法在转化为天然产物本身后被证明是不成功的。然而,将甲硅烷基烯醇醚添加至氧鎓离子,然后进行一锅脱苄基化/螺酮基化/热力学平衡程序,得到了作为单一非对映异构体的伯克利酸核心的四环结构。