Benzannulation of 2-Alkenylindoles using Aldehydes by Sequential Triple-Relay Catalysis: A Route to Carbazoles and Carbazole Alkaloids
作者:Ankush Banerjee、Samrat Sahu、Modhu Sudan Maji
DOI:10.1002/adsc.201700092
日期:2017.6.6
sequential triple‐relay‐catalysis, provides an easy access to several structurally unique carbazoles including 2‐ and 3‐alkenylcarbazoles. This protecting group‐free method enabled one‐pot synthesis of alkaloids such as hyellazole and 6‐chlorohyellazole, and the formal syntheses of seven other alkaloids. Construction of the core structure, present in murastifoline A, murrafoline E, and related alkaloids was
在单锅顺序三重继电器催化下,将2-烯基吲哚的苯并环与现成的醛一起可轻松获得包括2-3和3-烯基咔唑在内的几种结构独特的咔唑。这种无保护基团的方法可以一锅法合成生物碱,例如hyellazole和6-chlorohyellazole,以及其他七个生物碱的正式合成。还证实了存在于murastifoline A,murrafoline E和相关生物碱中的核心结构的构建。甚至共轭的3,3'-双咔唑也可以通过一锅,两次连续的三重催化合成。