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
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。