The reaction of cyclopropabenzene with 1,3-diphenylisobenzofuran: formal [4π + 2π] and [4π + 2σ] cycloadditions
作者:Udo H. Brinker、Hartmut Wüster
DOI:10.1016/s0040-4039(00)74835-0
日期:1991.1
Cyclopropabenzene reacts with diphenylisobenzofuran (DPIBF) to afford the formal endo and exo [4-pi+2-pi] adducts 2 and 4. In addition, the unsymmetrical formal [4-pi+2-sigma] adduct 3 is found. The reaction shows a temperature dependency. A mechanism for the formation of 2, 3, and 4 involving highly stabilized diradicals is offered.