作者:Timothy J. Donohoe、Allan J. Orr、Katherine Gosby、Matilda Bingham
DOI:10.1002/ejoc.200500113
日期:2005.5
The ring closing metathesis (RCM) reaction can be used to prepare substituted furans and pyrroles. By utilising a Pd-catalysed coupling reaction with methoxyallene, allylic alcohols and sulfonamides can be converted into substrates that are ideal precursors to ring closing metathesis. After the RCM reaction is complete, the addition of acid promotes an elimination of methanol to form the fully aromatised
闭环复分解(RCM)反应可用于制备取代的呋喃和吡咯。通过利用 Pd 催化的与甲氧基丙二烯的偶联反应,烯丙醇和磺酰胺可以转化为底物,这些底物是闭环复分解的理想前体。RCM 反应完成后,酸的加入促进甲醇的消除,形成完全芳构化的体系。一系列不同的取代模式和官能团与该序列兼容。双丙二烯偶联、RCM 和消除反应也是可能的,并允许形成联芳系统。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)