A Convenient Enantiospecific Route towards Bioactive Merosesquiterpenes by Cationic-Resin-Promoted Friedel-Crafts Alkylation with α,β-Enones
作者:Enrique Alvarez-Manzaneda、Rachid Chahboun、Eduardo Cabrera、Esteban Alvarez、Ali Haidour、Jose Miguel Ramos、Ramón Alvarez-Manzaneda、Rubén Tapia、Hakima Es-Samti、Antonio Fernández、Inmaculada Barranco
DOI:10.1002/ejoc.200801174
日期:2009.3
An enantiospecific route towards bioactive merosesquiterpenes, based on the cationic-resin-promoted Friedel–Crafts alkylation of alkoxyarenes with an α,β-unsaturated ketone, is reported. Reaction of ketone 11 with 3,4-methylenedioxyphenol afforded the corresponding chromene. Treatment of 11 with protected phenol 20 gave aryl nordrimane ketone 21, a suitable intermediate in the synthesis of bioactive
据报道,基于阳离子树脂促进的 Friedel-Crafts 烷基化烷氧基芳烃与 α,β-不饱和酮的生物活性merosesquiterpenes 的对映特异性途径。酮 11 与 3,4-亚甲二氧基苯酚反应得到相应的色烯。用受保护的苯酚 20 处理 11 得到芳基去甲烷酮 21,这是合成生物活性merosesquiterpenes 及其 8-epi 衍生物的合适中间体。通过利用这种方法,描述了 (+)-puupehenone 和其他相关代谢物的正式合成,通过三氟甲磺酸酯 25。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)