catalytic rhodium carboxylate dimer and diallylsulfide (1.1 equiv), undergo sequential alkyne insertion/ylide formation/sigmatropic rearrangement to give γ-allylthio cyclic enones. This transformation was used to probe the influence of alkyne substituents on 5-exo vs. 6-endo cyclization selectivity in the alkyne insertion event.
乙炔α-重
氮酮1在用催化
羧酸铑二聚体和
二烯丙基硫醚(1.1当量)处理时,会依次进行
炔烃插入/内酯形成/σ重排,得到γ-烯丙基
硫代环烯酮。此转化用于探测
炔烃插入事件中
炔烃取代基对5-exo与6-endo环化选择性的影响。