variant is unknown. Reported herein is the first rhodium‐catalyzed asymmetric cycloisomerization of meso‐oxabicyclic alkenes tethered to bridgehead nucleophiles, thus providing access to tricyclic scaffolds through a myriad of enantioselective C−O, C−N, and C−C bond formations. Moreover, we also demonstrate a unique parallel kinetic resolution, whereby racemic oxabicycles bearing two different bridgehead
在过去的二十年中,虽然已报道了氧杂双环烯烃与各种亲核试剂的分子间不对称开环反应引起的脱对称,但尚无分子内变异的证明。本文报道的是第一个介导桥头亲核试剂的中氧杂双环烯烃的
铑催化的不对称环异构化反应,从而通过无数对映选择性的C-O,C-N和C-C键形成提供了进入
三环骨架的途径。此外,我们还证明了独特的平行动力学分辨率,其中带有两个不同桥头亲核试剂的外消旋氧杂环可以对映选择性拆分。