Rapid assembly of fluorene-based spirocycles represents a highly significant but challenging task in organic synthesis. Reported herein is a novel Pd(0)-catalyzed [4+1] spiroannulation of simple o-iodobiaryls with bromonaphthols for the one-step construction of [4,5]-spirofluorenes in high yields with excellent functional group tolerance. Noteworthily, these valuable fluorene-based coumarin skeletons
芴基螺环的快速组装代表了有机合成中非常重要但具有挑战性的任务。本文报道的是一种新颖的Pd(0)催化的简单邻
碘二芳基与
溴酚合成的Pd(0)螺环化,用于一步合成高纯度[4,5]-螺
芴并具有出色的官能团耐受性。值得注意的是,这些有价值的
芴基
香豆素骨架可以丰富C-
香豆素的数据库,并具有出色的光谱性能。