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。
Synthetic Studies on the Sulfur-Cross-Linked Core of Antitumor Marine Alkaloid, Discorhabdins: Total Synthesis of Discorhabdin A This work was supported by a Grant-in-Aid for Scientific Research (S) (No. 13853010), for Scientific Research on Priority Area (A) (No. 13029062), and for the Encouragement of Young Scientists (No. 13771331) from the Ministry of Education, Science, Sports, and Culture, Japan. H.T. also thanks the Hoh-ansha Foundation for a research fellowship. We thank Professor Murray H. G. Munro (University of Canterbury) for providing a copy of spectroscopic data of natural discorhabdin A.
作者:Hirofumi Tohma、Yuu Harayama、Miki Hashizume、Minako Iwata、Masahiro Egi、Yasuyuki Kita