A facile synthesis of tetrahydrobenzo[b]furans via gold(I)‐catalyzed cycloisomerization of 1‐aryl‐2‐propargylcyclohex‐2‐enols is described. The transformation is suggested to proceed through a gold(I)‐catalyzed tertiary allylic alcohol rearrangement to give a secondary allylic alcohol that underwent a 5‐exo‐dig addition of the hydroxyl group onto the gold(I)‐activated alkyne to give a vinylgold species
描述了一种通过
金(I)催化的1-芳基-2-炔丙基环己二-2-烯醇的环异构化反应轻松合成四氢苯并[ b ]
呋喃的方法。建议该转化过程通过
金(I)催化的叔
烯丙醇重排进行,得到仲烯丙基醇,该仲
烯丙醇经过羟基5-exo-dig加成到
金(I)活化的
炔烃上以生成
乙烯基金种类。所得到的
乙烯基金中间体的原型脱脂,然后进行芳构化,得到四氢苯并[ b ]
呋喃。