compounds. The conformational ratio of these compounds in solution was correlated linearly with Hammett’s σp value of the substituent on the anilide ring, reflecting the repulsive interaction between the carbonyl group and the electron-rich aryl group. The addition of acid into the solution of 6, bearing pentafluorobenzoyl group, switched the stable amide conformation. In addition, the sizeable rotational
基于酰胺的分子开关在结构多样性上有其局限性。在这项工作中,我们设计并合成了一系列基于
五氟苯甲酰基的苯甲酰
苯胺化合物。这些化合物在溶液中的构象比与
苯胺环上取代基的Hammett σ p值线性相关,反映了羰基和富电子芳基之间的排斥相互作用。在带有
五氟苯甲酰基的6溶液中加入酸,改变了稳定的酰胺构象。此外,由
五氟苯甲酰基部分诱导的6的相当大的旋转屏障使我们能够通过1 H NMR 光谱监测构象转变。