B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub> promoted cyclisation of internal propargyl esters: structural characterisation of 1,3-dioxolium compounds
作者:Max M. Hansmann、Rebecca L. Melen、Frank Rominger、A. Stephen K. Hashmi、Douglas W. Stephan
DOI:10.1039/c4cc01370k
日期:——
The reactions of internal propargyl esters with B(C6F5)3 provide access to stable zwitterionic 1,3-dioxolium compounds which are characterised by X-ray diffraction. These 6pi-electron systems show no significant aromatic stabilisation.
内部炔丙基酯与B(C6F5)3的反应提供了通过X射线衍射表征的稳定两性离子1,3-二氧杂鎓化合物的途径。这些6π电子系统没有显示出明显的芳族稳定作用。