4.8 Article

Pleiokomenines A and B: Dimeric Aspidofractinine Alkaloids Tethered with a Methylene Group

Journal

ORGANIC LETTERS
Volume 19, Issue 22, Pages 6180-6183

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.7b03098

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Funding

  1. ANBG (Agence Nationale des Bourses du Gabon) [828988C]
  2. French ANR grant [ANR-15-CE29-0001]
  3. Agence Nationale de la Recherche (ANR) [ANR-15-CE29-0001] Funding Source: Agence Nationale de la Recherche (ANR)

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Pleiokomenines A and B (1 and 2), first examples of dimeric aspidofractinine alkaloids linked by a methylene bridge, were isolated from the stem bark of Pleiocarpa mutica. Their structures were elucidated by a combination of spectroscopic analyses and semisynthetic derivatization of pleiocarpinine (3) and a formaldehyde equivalent mediated by scandium trifluoromethanesulfonate. Pleiokomenines A (1) and B (2) showed moderate antiplasmodial activities in the micromolar range against the FcB1 strain

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