thiols has been explored. The reaction proceeds through a new hydroxysulfenylation-initiated lactonization pathway with carboxyl as electrophilic group, which provides an efficient access to assembly highly valuable thio-substituted lactone derivatives with good yields under mild conditions. Several control experiments, as well as an isotope labelling experiment disclose that oxygen acts as both oxidant
已经研究了
乙酸铜(II)催化的C = C双键的需
氧硫醇化,
氧合以及不饱和
羧酸与
硫醇的分子内环化反应。该反应通过以羧基为亲电基团的新的羟基磺酰化引发的内
酯化途径进行,这提供了在温和条件下以良好收率高效组装高价
硫取代的内
酯衍
生物的途径。几个对照实验以及同位素标记实验表明,
氧气既是
氧化剂,又是反应物,被转移到最终产物中。机理研究支持通过基于不饱和
羧酸的
烯烃的双官能化来构建新取代内
酯的新策略的发现。