Total Synthesis of Luotonin A and Rutaecarpine from an Aldimine via the Designed Cyclization

Se Hyun Kwon, Hong Ahn Seo, Cheol Hong Cheon

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65 Citations (Scopus)


The total synthesis of rutaecarpine (1) and luotonin A (2) is described through controlled cyclization of a common aldimine intermediate 5 derived from ethyl-2-aminocinnamate and quinazolinone-2-carbaldehyde. The cyanide-mediated imino-Stetter reaction of aldimine 5 provided the corresponding indole derivative 3, from which the total synthesis of rutaecarpine (1) was completed via the formation of a 6-membered C-ring. On the other hand, microwave-assisted thermal 6π-electrocyclization of the common intermediate 5, followed by the formation of a 5-membered C′-ring, allowed the completion of the total synthesis of luotonin A (2).

Original languageEnglish
Pages (from-to)5280-5283
Number of pages4
JournalOrganic Letters
Issue number20
Publication statusPublished - 2016 Oct 21

Bibliographical note

Funding Information:
This work was supported by National Research Foundation of Korea (NRF) grants funded by the Korean Government (NRF- 2015R1D1A1A01057200 and NRF-20100020209). C.-H.C. is also thankful for financial support from an NRF grant funded by the Korean Government (NRF-2014-011165; Center for New Directions in Organic Synthesis).

Publisher Copyright:
© 2016 American Chemical Society.

Copyright 2016 Elsevier B.V., All rights reserved.

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry


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