Ring-strain effects on the efficiencies and deuterium effects on the efficiencies and regioselectivities of the di-π-methane rearrangement of bicyclic systems
作者:Helfried Hemetsberger、Frank Nispel
DOI:10.1016/s0040-4020(01)90518-6
日期:1990.1
synthesized and irradiated under sensitized conditions. The compounds 12 - 15 yielded di-π-methane rearrangement products. 16 was not reactive. The quantum yields for product formation were measured. They increase with ring strain of the bicyclic systems. A kinetic isotope effect on the regiospecifity of the rearrangement was observed in all cases. In addition, an isotope effect on the quantum yields of
的protio-和单vinyldeuterated benzobicyclo(n.2.2]烯烃(n = 1至4)12 - 13和15 - 16和1,2-二cyclopropabenzobarrelene 14被合成并致敏条件下照射的化合物。12 - 15产生二-π甲烷重排产物。16没有反应性的。测定产物形成的量子产率,它们增加了与双环体系的环应变。甲动力学同位素效应上在所有情况下观察到了重排的regiospecifity。此外,在13和15中观察到同位素对产物形成的量子产率的影响。