to afford 1-propenylbenzenes. The reaction shows a unique substituent effect that is highly dependent on the distance of substituents from the allylic moiety. Thus, the reactivity of substrates bearing a methyl group is ordered in para > meta > ortho, whereas it is entirely reversed as ortho > meta > para for methoxy and chloro substituents.
Pd(OAc)2 -HFIP的新型催化剂体系可在温和条件下以低催化负载诱导烯丙基苯的双键迁移,从而生成
1-丙烯基苯。该反应显示出独特的取代基效应,该效应高度依赖于取代基与烯丙基部分的距离。因此,带有甲基的底物的反应性在对位 > 间位 > 邻位中是有序的,而对于甲氧基和
氯取代基,其完全被邻位 > 间位 > 对位相反。