Photosubstitution of dicyanoarenes with hypervalent allylsilicon reagents in the presence of anthracene efficiently proceeded to afford the allyl-substituted product in moderate to good yields. The efficiency for the present photoreaction was much higher than that for the tetracoordinate allylsilanes, because hypervalent allylsilicon reagents possess lower oxidation potential than the tetracoordinate ones, which resulted in more efficient photoinduced electron-transfer process.
在
蒽的存在下,二
氰基烯烃与高价烯丙基
硅试剂的光取代反应可以有效地进行,从而得到烯丙基取代的产物,收率为中等到良好。与四配位烯丙基
硅烷相比,本光反应的效率要高得多,这是因为高价烯丙基
硅试剂的氧化电位比四配位烯丙基
硅试剂的氧化电位低,因此光诱导电子转移过程的效率更高。