Synthesis of Antitumor Marine Alkaloid Discorhabdin A Oxa Analogues
作者:Yasufumi Wada、Kouji Otani、Noriko Endo、Yu Harayama、Daigo Kamimura、Masako Yoshida、Hiromichi Fujioka、Yasuyuki Kita
DOI:10.1021/ol901471r
日期:2009.9.17
Discorhabdin A (1) exhibits a strong cytotoxic activity in vitro, but it is difficult to synthesize and handle due to the instability of its highly strained N,S-acetal structure. We then designed the analogues of discorhabdin A which also have strong cytotoxic activity and stability. The synthesis and examination of the biological activity of various types of stable discorhabdin A oxa analogues (2)
Discorhabdin A(1)在体外表现出很强的细胞毒性活性,但由于其高度拉紧的N,S-缩醛结构的不稳定性,因此难以合成和处理。然后,我们设计了Discorhabdin A的类似物,它们也具有很强的细胞毒活性和稳定性。合成和检查了各种类型的稳定Discorhabdin A oxa类似物(2)的生物活性。
The First Total Synthesis of Discorhabdin A
作者:Hirofumi Tohma、Yu Harayama、Miki Hashizume、Minako Iwata、Yorito Kiyono、Masahiro Egi、Yasuyuki Kita
DOI:10.1021/ja0365330
日期:2003.9.1
The first stereoselective totalsynthesis of a potent antitumor alkaloid, discorhabdin A (1), which is a unique sulfur-containing pyrroloiminoquinone alkaloid, is described. The key step in the stereocontrolled totalsynthesis of 1 involves both a diastereoselective oxidative spirocyclization using a hypervalent iodine(III) reagent and an efficient construction of the labile and highly strained N,S-acetal
描述了强效抗肿瘤生物碱 discorhabdin A (1) 的第一个立体选择性全合成,它是一种独特的含硫吡咯亚氨基醌生物碱。1 的立体控制全合成的关键步骤包括使用高价碘 (III) 试剂的非对映选择性氧化螺环化和不稳定且高度紧张的 N,S-缩醛骨架的有效构建。这些方法为这些有前途的新型抗肿瘤药物、discorhabdins 及其类似物的全合成提供了突破,这些药物应作为结构活性研究的有价值的探针。