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Augustamine type alkaloids from Crinum kirkii
Alex K Machocho1, Jaume Bastida, Carlos Codina
1Department of Chemistry, Kenyatta University, PO Box 43844, 00100 GPO, Nairobi, Kenya.
Phytochemistry
|November 16, 2004
Summary
Researchers isolated novel Amaryllidaceae alkaloids from Crinum kirkii bulbs, with some showing activity against sleeping sickness parasites. These findings expand the known chemical diversity of these plant compounds.
Area of Science:
- Phytochemistry
- Medicinal Chemistry
- Parasitology
Background:
- The Amaryllidaceae family is a rich source of bioactive alkaloids.
- Crinum kirkii Baker is a plant species known to contain various alkaloids.
Purpose of the Study:
- To isolate and characterize novel alkaloids from Crinum kirkii bulbs.
- To evaluate the biological activity of isolated alkaloids against parasitic protozoa.
Main Methods:
- Isolation of alkaloids using chromatographic techniques.
- Structure elucidation employing physical and spectroscopic methods, including 2D NMR.
- Antiparasitic activity screening against Trypanosoma brucei rhodesiense and Trypanosoma cruzi.
Main Results:
- Sixteen Amaryllidaceae alkaloids were isolated, including two previously unknown compounds: noraugustamine and 4a,N-dedihydronoraugustamine.
- Complete structural characterization of known and new alkaloids was achieved.
- 1,2-Diacetyllycorine and 3-O-acetylsanguinine demonstrated activity against Trypanosoma brucei rhodesiense.
- 3-O-acetylsanguinine exhibited activity against Trypanosoma cruzi.
Conclusions:
- The study successfully identified new Amaryllidaceae alkaloids from Crinum kirkii.
- Certain isolated alkaloids possess potential therapeutic value against trypanosomal infections.
- Further research into these alkaloids could lead to new treatments for neglected tropical diseases.