A Formal Asymmetric Synthesis of (+)-Anatoxin-a Using an Enantioselective Deprotonation Strategy on an Eight-Membered Ring
作者:Varinder K. Aggarwal、Paul S. Humphries、Ashley Fenwick
DOI:10.1002/(sici)1521-3773(19990712)38:13/14<1985::aid-anie1985>3.0.co;2-7
日期:1999.7.12
In only seven steps a formal synthesis of enantiomerically enriched (+)-anatoxin-a has been achieved. This was accomplished by utilizing a highly enantioselective desymmetrization of the eight-membered ring ketone 1 to form 2, and a novel cascade reaction to construct the 9-azabicyclo[4.2.1]nonane skeleton.
仅通过七个步骤,就实现了对映体富集的 (+)-anatoxin-a 的正式合成。这是通过利用八元环酮 1 的高度对映选择性去对称化形成 2,以及构建 9-氮杂双环 [4.2.1] 壬烷骨架的新型级联反应来实现的。