Stereoselective Synthesis of Tropanes via a 6π‐Electrocyclic Ring‐Opening/ Huisgen [3+2]‐Cycloaddition Cascade of Monocyclopropanated Heterocycles
作者:Carina M. Sonnleitner、Saerom Park、Robert Eckl、Thomas Ertl、Oliver Reiser
DOI:10.1002/anie.202006030
日期:2020.10.5
synthesis of pharmaceutically relevant targets, especially for new cocaine analogues bearing various substituents at the C‐6/C‐7 positions of the tropane ring system. Moreover, the 2‐azabicyclo[2.2.2]octane core (isoquinuclidines), being prominently represented in many natural and pharmaceutical products, is accessible via this approach.
证明了通过微波辅助、立体选择性 6π-电环开环/Huisgen [3+2]-环丙烷化吡咯和呋喃衍生物与缺电子亲偶极子的环加成级联合成托烷。从呋喃或吡咯开始,8-氮杂-和8-氧杂双环[3.2.1]辛烷可以通过两个步骤以双选择性和对映选择性纯形式获得,是合成药物相关靶标的通用构建模块,尤其是新的可卡因类似物在托烷环系统的C-6/C-7位置带有各种取代基。此外,在许多天然和药物产品中突出存在的2-氮杂双环[2.2.2]辛烷核心(异奎宁环)可以通过这种方法获得。