Related Experiment Video
Updated: Jul 17, 2026
11:51
Facile Preparation of 4-Substituted Quinazoline Derivatives
Published on: February 15, 2016
[Benzo[c][2,7]naphthyridine-5-yl-amines and benzo[h][1,6]naphthyridine-5-yl-amines--potential antimalarials]
K Görlitzer1, M Bode, P G Jones
1Institut für Pharmazeutische Chemie, Beethovenstrasse 55, D-38106 Braunschweig, Germany. k.goerlitzer@tu-bs.de
Die Pharmazie
|February 14, 2007
Summary
New benzonaphthyridine derivatives were synthesized and tested for antimalarial activity. Amodiaquine analogue 20 showed potent activity against sensitive Plasmodium falciparum, while isoquinoline derivatives 15a and 16a were most effective against resistant strains.
Area of Science:
- Medicinal Chemistry
- Organic Synthesis
- Parasitology
Context:
- The development of novel antimalarial agents is crucial to combat drug-resistant Plasmodium falciparum.
- Benzonaphthyridine and isoquinoline scaffolds are recognized for their antimalarial potential.
Purpose:
- To synthesize novel benzonaphthyridine and isoquinoline derivatives.
- To evaluate the in vitro antimalarial activity of these compounds against chloroquine-sensitive and -resistant Plasmodium falciparum strains.
Summary:
- Various benzonaphthyridine derivatives were synthesized through reactions with different amines and aminomethylation. Amodiaquine analogues and isoquinoline Mannich bases were also prepared.
- The structures of several synthesized compounds were confirmed by X-ray crystallography.
- Antimalarial activity was assessed in vitro. Amodiaquine analogue 20 exhibited significant activity against the sensitive strain (IC50 = 160 nM), while a mixture of isoquinoline derivatives (15a and 16a) showed the best activity against the resistant strain (IC50 = 1100 nM).
Impact:
- Identifies promising lead compounds, amodiaquine analogue 20 and isoquinoline derivatives 15a/16a, for further antimalarial drug development.
- Provides valuable structure-activity relationship data for benzonaphthyridine and isoquinoline-based antimalarials.
- Contributes to the ongoing search for effective treatments against malaria, particularly drug-resistant malaria.
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