AbstractThe total synthesis of the natural phytoalexin 2,6-dimethoxy-9-phenyl-1H-phenalen-1-one (3)isolated fromEichhornia crassipeswas accomplished in seven steps. The synthetic strategy included a Friedel–Crafts acylation and a Jacobsen–Katsuki epoxidation as the key reactions to obtain the target compound. Based on a comparison of the NMR data and a crystal structure of3, the previously proposed structure of 2,5-dimethoxy-4-phenyl-benzoindenone (2)isolated from the same plant has been revised.
摘要:从巴西水蕨中分离出的天然植物抗菌素2,6-二甲氧基-9-苯基-1H-菲啰啉-1-酮(3)的全合成经过七个步骤完成。合成策略包括弗里德尔-克拉夫茨酰化和雅各布森-卡茨基环氧化作为获得目标化合物的关键反应。通过比较核磁共振数据和3的晶体结构,已经修订了之前从同一植物中分离出的2,5-二甲氧基-4-苯基苯并二酮(2)的结构。