Diastereomeric mixtures of 2-substituted 1-vinyclyclohexyl acetates (or benzoates) are rearranged stereoselectively to 2-substituted (E)-β-acetoxy(or benzoyloxy)ethylidenecyclohexanes by the catalysis of bis(acetonitrile)palladium(II) chloride. A mechanism related to the stereoselectivity and reactivity is discussed in terms of the conformational requirements in a transition state.
通过
氯化双(
乙腈)
钯(II)的催化作用,将2-取代的1-
乙烯基乙酸己基
乙酸酯(或
苯甲酸酯)的非对映异构体混合物立体选择性地重排为2-取代的(E)-β-乙酰氧基(或苯甲酰氧基)
亚乙基环己烷。根据过渡态的构象要求,讨论了与立体选择性和反应性有关的机制。