Rhodium-Catalyzed C–H Activation of Indoles for the Construction of Spiroindole Scaffolds
作者:Biao Ma、Hui-Xiong Dai、Huiying Wang、Mengmeng Wang
DOI:10.1055/a-1791-7218
日期:2022.11
powerful synthetic approach to streamline the synthesis of substituted spiroindoles. To date, various 2- and 3-indolyl-tethered aza-spiro-centers have been successfully achieved via C–H activation. However, introduction of spiro-containing systems onto the benzenoid core of indole still remains challenging. Herein, a method of Rh(III)-catalyzed selective C7-H activation/cyclization of indole with maleimide
螺吲哚是大量天然产物、药物和农用化学品中的关键支架。选择性 C-H 活化已成为一种强大的合成方法,可简化取代螺吲哚的合成。迄今为止,已经通过 C-H 活化成功地实现了各种 2-和 3-吲哚基束缚氮杂螺中心。然而,将含螺系统引入吲哚的苯核核心仍然具有挑战性。本文报道了一种 Rh(III) 催化的选择性 C7-H 活化/吲哚与马来酰亚胺环化以提供新型螺吲哚衍生物的方法,该方法将琥珀酰亚胺和螺环结合到吲哚单元中。革兰氏规模合成展示了该协议的实用性,通过点击化学进一步修改提供了一种新的支架作为多功能螺旋接头。