Flavones were directly alkylated at the C-3 position in moderate yields using a xanthate-based oxidative radical addition procedure. This methodology is a suitable synthetic tool for the direct substitution of the vinylic and unactivated C–H bond of the C ring of the flavone by an alkyl functionality under neutral conditions.
黄酮在C-3位点通过基于黄
硫酸盐的氧化自由基加成方法进行直接烷基化,获得了适中的产率。这一方法是一种适合在中性条件下直接替换
黄酮C环中烯基和未活化C–H键为烷基官能团的合成工具。