Synthesis 2024; 56(08): 1273-1284
DOI: 10.1055/a-2244-1600
feature
New Trends in Organic Synthesis from Chinese Chemists

Total Synthesis of Daphniphyllum Alkaloids: (+)-Daphlongamine E, (+)-Calyciphylline R, and (–)-10-Deoxydaphnipaxianine A

Yan Zhang
,
Yuye Chen
,
Jing Xu

Financial support from NSFC (No. 21971104 and 22271136), Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis (ZDSYS20190902093215877), Shenzhen Science, Technology and Innovation Commission (JCYJ20220814203252001), Guangdong Provincial Key Laboratory of Catalysis (No. 2020B121201002), Guangdong Innovative Program (No. 2019BT02Y335), Education Department of Guangdong Province, Key research projects in colleges and universities in Guangdong Province (2021ZDZX2035), Shenzhen Nobel Prize Scientists Laboratory Project (C17783101) and Innovative Team of Universities in Guangdong Province (2020KCXTD016) is greatly appreciated.


Abstract

Here, we wish to describe our detailed efforts in the total synthesis of three calyciphylline A-type alkaloids, namely (+)-daphlongamine E, (+)-calyciphylline R, and (–)-10-deoxydaphnipaxianine A. Important steps in our approach include a Pt-catalyzed nitrile hydration, a Babler–Dauben rearrangement, a novel selective amide reduction tactic, and an oxidative Nazarov cyclization via an unfunctionalized tertiary divinyl carbinol (TDC).

Supporting Information



Publikationsverlauf

Eingereicht: 12. Dezember 2023

Angenommen nach Revision: 12. Januar 2024

Accepted Manuscript online:
12. Januar 2024

Artikel online veröffentlicht:
13. Februar 2024

© 2024. Thieme. All rights reserved

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany