Xanthone derivatives: new insights in biological activities

MMM Pinto, ME Sousa… - Current medicinal …, 2005 - ingentaconnect.com
Xanthones or 9H-xanthen-9-ones (dibenzo-γ-pirone) comprise an important class of
oxygenated heterocycles whose role is well-known in Medicinal Chemistry. The biological …

From natural products to new synthetic small molecules: A journey through the world of xanthones

MMM Pinto, A Palmeira, C Fernandes, DISP Resende… - Molecules, 2021 - mdpi.com
This work reviews the contributions of the corresponding author (MMMP) and her research
group to Medicinal Chemistry concerning the isolation from plant and marine sources of …

Antimalarial drugs inhibiting hemozoin (β-hematin) formation: a mechanistic update

S Kumar, M Guha, V Choubey, P Maity… - Life sciences, 2007 - Elsevier
Digestion of hemoglobin in the food vacuole of the malaria parasite produces very high
quantities of redox active toxic free heme. Hemozoin (β-hematin) formation is a unique …

Insights into the mechanism of action of ferroquine. Relationship between physicochemical properties and antiplasmodial activity

C Biot, D Taramelli, I Forfar-Bares… - Molecular …, 2005 - ACS Publications
Ferroquine (FQ) is a 4-aminoquinoline antimalarial which contains a quinoline nucleus
similar to chloroquine, but a novel ferrocenic group in its side chain. Previous work has …

Speciation and structure of ferriprotoporphyrin IX in aqueous solution: spectroscopic and diffusion measurements demonstrate dimerization, but not μ-oxo dimer …

KA de Villiers, CH Kaschula, TJ Egan… - JBIC Journal of Biological …, 2007 - Springer
Abstract Changes in ε 393 (the Soret band) of aqueous ferriprotoporphyrin IX [Fe (III) PPIX]
with concentration indicate that it dimerizes, but does not form higher aggregates. Diffusion …

Antimalarial xanthones from Calophyllum caledonicum and Garcinia vieillardii

AE Hay, JJ Hélesbeux, O Duval, M Labaïed, P Grellier… - Life sciences, 2004 - Elsevier
The antimalarial activity of 22 xanthones against chloroquino-resistant strains of
Plasmodium falciparum was evaluated. Natural caloxanthone C (1) …

A method for the synthesis of substituted quinolines via electrophilic cyclization of 1-azido-2-(2-propynyl) benzene

Z Huo, ID Gridnev, Y Yamamoto - The Journal of Organic …, 2010 - ACS Publications
A new and efficient strategy for the synthesis of substituted quinolines via electrophilic
cyclization is developed. The intramolecular cyclization of 1-azido-2-(2-propynyl) benzene 1 …

Interactions of quinoline antimalarials with hematin in solution

TJ Egan - Journal of inorganic biochemistry, 2006 - Elsevier
Quinoline antimalarial drugs such as chloroquine and related compounds are believed to
act by targeting ferriprotoporphyrin IX (Fe (III) PPIX) in the form of hematin (H2O/HO–Fe (III) …

Xanthones as antimalarial agents: discovery, mode of action, and optimization

M Riscoe, JX Kelly, R Winter - Current medicinal chemistry, 2005 - ingentaconnect.com
It is believed that at no time in the history of the human race malaria has been absent. This
disease, which is caused by protozoa of the genus Plasmodium, in all likelihood has been …

Antiprotozoal Activities of Heterocyclic-Substituted Xanthones from the Marine-Derived Fungus Chaetomium sp.

A Pontius, A Krick, S Kehraus, R Brun… - Journal of natural …, 2008 - ACS Publications
Investigations of the marine-derived fungus Chaetomium sp. led to the isolation of the new
natural products chaetoxanthones A, B, and C (1− 3). Compounds 1 and 2 are substituted …