An efficient, concise and tactically new synthesis of aristolactams is described. The key step is the aryne-mediated cyclization of an amino carbanion derived from a phosphorylated halobenzamide derivative. Horner reaction, radical cyclization and ultimate deprotection complete the synthesis of the phenanthrene lactam alkaloids. The viability of the strategy is further illustrated by the synthesis of cepharanone A and B.
描述了一种高效、简洁且战术新颖的阿里斯托拉克塔姆合成方法。关键步骤是利用芳烯介导的环化反应,将来自
磷酸化卤代苯酰胺衍
生物的
氨基羰基阴离子进行环化。霍纳反应、自由基环化和最终去保护完成了苯并
蒽内酯
生物碱的合成。该策略的可行性通过合成
头孢霉素A和B进一步得到了验证。