Cited by 58Oxidative Organic Chemistry ReactionsMetal-Catalyzed Oxygenation MechanismsSesquiterpenes and Asteraceae Studies

Catalysed oxygenation of allylic hydroperoxides derived from qinghao (artemisinic) acid. Conversion of qinghao acid into dehydroginghaosu (artemisitene) and qinghaosu (artemisinin)

Haynes, Richard K., Vonwiller, Simone C.·1990·Journal of the Chemical Society, Chemical Communications

Abstract

Photo-oxygenation of ginghao acid and its dihydro analogue provides allylic hydroperoxides which are converted either indirectly via the corresponding esters, or directly into dehydroginghaosu (artemisitene) and the antimalarial ginghaosu (artemisinin), by treatment with a catalytic amount of copper(II) trifluoromethanesulphonate with or without an iron(III) co-catalyst in dichloromethane-acetonitrile under oxygen.

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Registry

Crossref · 10.1039/c39900000451

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4 of 4 references verified0 citation errors · 0 not checkable

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  • Artemisitene can be obtained readily by chemical transformations of artemisinin, and a partial synthesis of artemisitene from artemisinic acid (473) has been reported.

    “although artemisitene can be obtained readily by chemical transformations of artemisinin [165,213,241,242]; and a partial synthesis of artemisitene from artemisinic acid (473) has also been reported [243].”
  • Photooxygenation of artemisinic acid (473) in vitro leads to arteannuin B (462) and 11,13-dehydro analogues of artemisinin.

    “There is indeed ample precedent for the formation of such hydroperoxides from 473 by photooxygenation reactions in vitro [243], which lead both to arteannuin B (462) [251] and 11,13-dehydro analogues of artemisinin [254,308].”
  • In vitro experiments have shown that 481 can undergo spontaneous conversion to a transient enol as proposed in step ii).

    “These in vitro experiments have shown that 481 can indeed undergo sponataneous conversion to a transient enol as proposed in step ii) of Scheme 11 [204,238,243,302,303]”

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Authors
Haynes, R. K., & Vonwiller, S. C.
Venue
Journal of the Chemical Society, Chemical Communications
Published
1990
Issue
6
Pages
451
ISSN
0022-4936 (ISSN-L)
OpenAlex
W1977969711
Cited by
58
References
4
Citations by year
2025: 1 · 2023: 1 · 2021: 1 · 2020: 2 · 2018: 1 · 2017: 1 · 2016: 1 · 2015: 1 · 2014: 3 · 2013: 2 · 2012: 2
FWCI
2.74
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of the Chemical Society Chemical Communications (publishedVersion)
  • Rare & Special e-Zone (The Hong Kong University of Science and Technology) (submittedVersion)
Topics
  • Physical Sciences › Chemistry › Organic Chemistry › Oxidative Organic Chemistry Reactions
  • Physical Sciences › Chemistry › Inorganic Chemistry › Metal-Catalyzed Oxygenation Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Sesquiterpenes and Asteraceae Studies
Keywords
artemisinin, artemisinic acid, allylic hydroperoxides, photooxygenation, catalytic oxidation, antimalarial compounds, sesquiterpenes

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