Highly selective coupling-cyclization of 3,4-allenols with aryl iodides via the oxidative addition-exo-mode oxypalladation-reductive elimination sequence afforded 2,3-dihydrofurans efficiently. The cyclization mode and the regioselectivity observed for 3,4-allenols are unique and different from what was reported previously.
3,4- 烯醇与芳基
碘化物通过氧化加成-外向模式
氧化钯化-还原消除序列进行高选择性耦合-环化反应,从而高效地得到了 2,3- 二氢
呋喃。观察到的 3,4-烯醇的环化模式和区域选择性是独特的,有别于之前的报道。