Total Syntheses of Naucleamides A–C and E, Geissoschizine, Geissoschizol, (<i>E</i>)-Isositsirikine, and 16-<i>epi</i>-(<i>E</i>)-Isositsirikine
作者:Lei Li、Paruke Aibibula、Qianlan Jia、Yanxing Jia
DOI:10.1021/acs.orglett.7b00983
日期:2017.5.19
A divergent approach for the enantioselectivetotalsynthesis of eight monoterpenoid indole alkaloids was developed. The approach allows the first total syntheses of naucleamides A–C and E in only 6–8 steps and also enables the efficient synthesis of geissoschizine, geissoschizol, (E)-isositsirikine, and 16-epi-(E)-isositsirikine in 10–11 steps from commercially available crotonic aldehyde. The synthesis
leaves of Rhazyastricta have resulted in the isolation of the new indolealkaloids, 16 R -19,20- E -isositsirikine acetate, leepacine and dihydroeburnamenine, along with six known alkaloids. Among these, (−)-16 R ,21 R - O -methyleburnamine, 2-ethyl-3[2-(3-ethylpiperidino)ethyl]-indole, (20 S )-19,20-dihydrocondylocarpine and N -acetylaspidospermidine have been isolated for the first time from R. stricta
摘要 对 Rhazya stricta 根和叶的化学研究已经分离出新的吲哚生物碱、16 R -19,20-E -isositsirikine 醋酸盐、leepacine 和 dihydroeburnamenine,以及六种已知的生物碱。其中,(-)-16 R ,21 R - O -甲基乙胺、2-乙基-3[2-(3-乙基哌啶基)乙基]-吲哚、(20 S)-19,20-二氢髁蒎碱和N-乙酰螺蒡首次从 R. stricta 中分离出来。(+)-21 S-eburnamenine 和配糖生物碱strictosamide 的光谱研究也已进行。
A three enzyme system to generate the Strychnos alkaloid scaffold from a central biosynthetic intermediate
作者:Evangelos C. Tatsis、Inês Carqueijeiro、Thomas Dugé de Bernonville、Jakob Franke、Thu-Thuy T. Dang、Audrey Oudin、Arnaud Lanoue、Florent Lafontaine、Anna K. Stavrinides、Marc Clastre、Vincent Courdavault、Sarah E. O’Connor
DOI:10.1038/s41467-017-00154-x
日期:——
Monoterpene indole alkaloids comprise a diverse family of over 2000 plant-produced natural products. This pathway provides an outstanding example of how nature creates chemical diversity from a single precursor, in this case from the intermediate strictosidine. The enzymes that elicit these seemingly disparate products from strictosidine have hitherto been elusive. Here we show that the concerted action
Compositions and methods for making terpenoid indole alkaloids
申请人:Willow BioSciences Inc.
公开号:US11072613B2
公开(公告)日:2021-07-27
Methods that may be used for the manufacture of a class of chemical compounds known as terpenoid indole alkaloids, including tabersonine and catharanthine are provided. Compositions useful for the synthesis of terpenoid indole alkaloids, including tabersonine and catharanthine are also provided. The provided compounds are useful in the manufacture of chemotherapeutic agents.