formed when the rotaxanes are constructed using an asymmetric axle and a three-dimensional non-symmetrical wheel. In this work, directional isomers of [2]rotaxanes were synthesised using lariat dibenzo-24-crown-8 ether as a non-symmetrical wheel component and a sec-ammonium salt axle. Control over the directional isomer ratio of [2]rotaxanes was achieved, as demonstrated by kinetic resolution via N-acetylation
摘要 轮烷可能具有拓扑异构体,因为它们具有机械互锁的轴和轮组件。当使用不对称轴和三维非对称轮构建轮烷时,会形成定向异构体。在这项工作中,使用套索二苯并-24-冠-8 醚作为非对称轮组件和仲
铵盐轴合成了 [2] 轮烷的定向异构体。实现了对 [2] 轮烷的定向异构体比例的控制,如通过[2] 轮烷的N-乙酰化的动力学拆分所证明的。