Flash vacuum thermolysis of dispiro[2.2.n.2]alkadienes
作者:P.A. Kraakman、E.T.J. Nibbering、W.H. De Wolf、F. Bickelhaupt
DOI:10.1016/s0040-4020(01)87687-0
日期:1987.1
The FlashVacuumThermolysis (FVT) of dispiro[2.2.6.2]-tetradeca-4,13-diene (7a), dispiro[2.2.5.2]trideca-4,12-diene (7b) and dispiro[2.2.2.2]deca-4,9-diene (7e) at 500 – 750 °C is reported. The complicated reaction mixture from 7a and 7b (Scheme 3) included at lower temperatures vinylspiroalkadienes 9, ethylidenespiroalkadiene 10b, β-ethylcycloalkabenzenes 11, while at higher temperatures, p-n-alkyl-