core of the final products was obtained by a late-stage anodic treatment. (R)-Naphthotectone was obtained in six steps from leuconaphthazarin with an overall yield of 38 % and an enantiomeric excess of 86 %. This compound was found to have the same absolute configuration as the natural product at its C-3′ stereogenic center. (S)-Naphthotectone was obtained in five steps from leuconaphthazarin with an
萘醌的两种异构体,一种来自马鞭草科 Tectona grandis 的
异戊二烯醌,具有有趣的
生物活性,通过两种不同的合成路线对映选择性地获得,其中使用 Sonogashira 或 Heck 偶联反应引入
萘醌核心的碳侧链。在这两种情况下,最终产品的
萘醌核都是通过后期阳极处理获得的。(R)-Naphthotectone 是从 leuconaphthazarin 以 38% 的总收率和 86% 的对映体过量分六个步骤获得的。发现该化合物在其 C-3' 立体中心具有与
天然产物相同的绝对构型。(S)-Naphthotectone 是从 leuconaphthazarin 以 36% 的总产率和 80% 的对映体过量分五步获得的。