Intermolecular radical addition of a xanthyl phosphonoacetate
to a γ,δ-enone gives rise to an adduct suitable for a base
induced Horner–Emmons ring closure to a cyclohexene derivative,
optionally after the reductive removal of the xanthate group.
将
膦酰基乙酸黄原酯与 γ、δ-烯酮进行分子间自由基加成,可产生一种加合物,该加合物适用于碱诱导的 Horner-Emmons 环闭合反应,生成
环己烯衍
生物,也可选择在还原去除黄原酯基团后进行。