Sespendole is an indole sesquiterpene alkaloid bearing two isoprenyl groups, one of which is highly oxidized. Herein, we disclose an eight-step synthesis of the aromatic fragment of sespendole in an optically pure form, starting from 4-bromo-2-fluoronitrobenzene. The key steps were a Claisen rearrangement at room temperature for introduction of the prenyl group and a coupling between the dianion generated
七萜是带有两个
异戊二烯基的
吲哚倍半萜生物碱,其中一个被高度氧化。在此,我们公开了以4-
溴-2-
氟硝基苯为原料的光学纯净形式的七萜烯芳香片段的八步合成方法。关键步骤是在室温下进行克莱森重排以引入
异戊二烯基,以及由异戊基化
溴化N-甲
苯磺酰苯胺生成的二价阴离子与手性环氧醛之间的偶联。