作者:Langchong He、Bin Cheng、Sanqi Zhang、Liyong Zhu、Jie Zhang、Qiang Li、Ailin Shan
DOI:10.1055/s-0029-1217393
日期:2009.8
commercially available isovanillin. Key steps in the synthesis are preparation of a symmetrical homodimer employing a classical Ullmann coupling reaction, and introduction of an allyl substituent by the Claisen rearrangement reaction. Significantly, the facile synthetic scheme proposed in this work has the characteristics of mild reaction conditions, inexpensive reagents, higher yield, and simple operation
从商业上可获得的异香草醛以10步高产率(总收率16.5%)轻松而高效地完成了他松的合成。合成中的关键步骤是采用经典的Ullmann偶联反应制备对称均二聚体,以及通过克莱森重排反应引入烯丙基取代基。值得注意的是,这项工作提出的简便的合成方案具有反应条件温和,试剂便宜,收率高和操作简单的特点。 他松-天然产物-全合成-乌尔曼偶联-克莱森重排