作者:Sandro Cacchi、Giancarlo Fabrizi、Antonella Goggiamani、Antonia Iazzetti、Rosanna Verdiglione
DOI:10.1016/j.tet.2015.10.002
日期:2015.12
A facile and general approach to the synthesis of 2,5,7-trisubstituted indoles from readily available 2-bromo-6-iodo-4-substituted and 2-bromo-4-chloro-6-iodoanilines is reported. The assembly of the indole rings is accomplished via a one-pot Sonogashira cross-coupling with terminal alkynes followed by a palladium-catalyzed cyclization step. The functionalization at C7 and at C5 (with indoles bearing
据报道,从容易获得的2-溴-6-碘-4-取代的和2-溴-4-氯-6-碘苯胺合成2,5,7-三取代的吲哚的简便而通用的方法。组件中的吲哚环的通过一锅与末端炔烃,接着钯催化环化步骤的Sonogashira交叉偶联来完成。在C7和C5官能(与吲哚轴承在C5一个氯取代基)通过alkynylations,Suzuki-Miyaura交叉偶联进行,布赫瓦尔德 - 哈特维希C-N成键反应。用于合成一锅协议2,5,7-三取代的吲哚,从2-芳基 - 7-溴-5- chloroindoles以及由2-溴-4-氯-6-碘苯胺也有所说明。