Gold‐Catalyzed Sequential Cycloisomerization of 1,3,9‐Ene‐allene‐ynes to Fused Spirocarbocycles
作者:Xianxiao Chen、Xiangxiang Ling、Di An、Weidong Rao
DOI:10.1002/ejoc.202000851
日期:2020.8.31
An efficient Au(I)‐catalyzed intramolecular sequential cycloisomerization of linear 1,3,9‐ene‐allene‐ynes to prepare architecturally challenging spiro tetrahydro‐3H‐dicyclopenta[a,b]naphthalene derivatives is reported. The proposed mechanism involves an initial gold‐catalyzed 1,3‐ene‐allene cycloisomerization, followed by a formal [4+2] cycloaddition to give the fused spirocarbocyclic products containing
据报道,一种有效的Au(I)催化的线性1,3,9-烯-丙二烯-炔类分子内顺序环异构化反应可制备出结构上具有挑战性的螺四氢-3H-二环戊[ a,b ]萘衍生物。拟议中的机制涉及初始的金催化的1,3-烯-丙二烯环异构化,然后进行正式的[4 + 2]环加成反应,从而以优异的效率得到稠合的含季碳中心的螺碳环产物。