ee). Moreover, we have also achieved the first syntheses of (+)-demecolcinone and metacolchicine, and determined their absolute configurations. The challenging tricyclic 6-7-7 core of colchicinoids was efficiently introduced using an intramolecular oxidopyrylium-mediated [5 + 2] cycloaddition reaction. Notably, the synthesized colchicinoid 23 exhibited potent inhibitory activity toward the cell growth
在这里,我们描述了(-)-
秋水仙碱的简明,对映选择性和可扩展合成(9.2%的总收率,> 99%ee)。此外,我们还实现了(+)-地美可
孕酮和间
秋水仙碱的首次合成,并确定了它们的绝对构型。使用分子内氧化
吡啶介导的[5 + 2]环加成反应有效地引入了具有挑战性的类
秋水仙碱三环6-7-7核心。值得注意的是,合成的类
秋水仙碱23对人类癌
细胞系的细胞生长具有强大的抑制作用(IC 50 =〜3.0 nM),并且比
秋水仙碱对微管组装的抑制作用更大,这使其成为寻找新型抗癌药物的有前途的线索。