Dynamics and a Unified Understanding of Competitive [2,3]- and [1,2]-Sigmatropic Rearrangements Based on a Study of Ammonium Ylides
作者:Bibaswan Biswas、Sean C. Collins、Daniel A. Singleton
DOI:10.1021/ja4128289
日期:2014.3.12
The [2,3]- and [1,2]-sigmatropic rearrangements of ammonium ylides are studied by a combination of experimental, standard computational, and dynamic trajectory methods. The mixture of concerted [2,3] rearrangement and bond cleavage observed experimentally is accounted for by the outcome of trajectories passing through the formal [2,3] rearrangement transition state. In this way the bond cleavage is
通过实验、标准计算和动态轨迹方法的组合研究了 [2,3]-和 [1,2]-sigmatropic 重排铵叶立德。实验中观察到的协同 [2,3] 重排和键裂解的混合是由通过正式 [2,3] 重排过渡态的轨迹的结果来解释的。通过这种方式,[2,3] 过渡态的周环稳定性促进了键的断裂。有人提出,这种动态效应是导致两种重排普遍同时发生的原因。