Electron-deficient cyclopropenium cations as Lewis acids in FLP chemistry
作者:Dipendu Mandal、Zheng-Wang Qu、Stefan Grimme、Douglas W. Stephan
DOI:10.1039/d3cc02684a
日期:——
substituents are Lewisacidic despite the presence of π-electrons. The chloride and electron affinities are examined computationally and experimentally, respectively. These cations form classic Lewis acid-base adducts with PPh3, while sterically demanding phosphines yield frustratedLewispairs (FLPs) which participate in FLP additions. Depending on the basicity of the phosphine used, addition to alkynes or alkyne