Reactions of AlCl3 and AlBr3 σ-complexes of cyclobutadienes
作者:P.B.J. Driessen、H. Hogeveen
DOI:10.1016/s0022-328x(00)84885-8
日期:1978.8
The useful reactivity of AlCl3 and AlBr3 σ-complexes of cyclobutadienes towards various reagents is demonstrated. In reactions with acetylenic derivatives (affording dewarbenzenes), nitriles (affording pyridines in the case of ethylcyanoformate) and sulfur dioxide, cycloadditions to liberated cyclobutadienes are possibly involved; in reactions with isocyanides a nucleophilic attack at the allylic moiety