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Functionalized Spirocyclic Heterocycle Synthesis and Cytotoxicity Assay
Published on: February 9, 2021
Novel polycyclic 'cage'-1,2-diamines as potential anti-tuberculosis agents
Oluseye K Onajole1, Yacoob Coovadia, Hendrik G Kruger
1School of Chemistry, University of KwaZulu-Natal, Durban, South Africa.
European Journal of Medicinal Chemistry
|June 5, 2012
Summary
New polycyclic cage compounds show potent anti-mycobacterial activity. The trishomocubanyl derivative (9) was most effective against tuberculosis strains, including multidrug-resistant and extensively drug-resistant types.
Area of Science:
- Medicinal Chemistry
- Organic Synthesis
- Microbiology
Background:
- Tuberculosis (TB) remains a significant global health threat.
- Emergence of multidrug-resistant (MDR) and extensively drug-resistant (XDR) TB necessitates novel therapeutic agents.
- SQ109 is a known anti-mycobacterial compound with a polycyclic adamantyl core.
Purpose of the Study:
- To synthesize and evaluate novel polycyclic 'cage' derivatives of N-geranyl-1,2 diamines.
- To investigate the impact of diverse polycyclic skeletons on anti-mycobacterial efficacy.
- To assess activity against virulent, MDR, and XDR strains of Mycobacterium tuberculosis.
Main Methods:
- Synthesis of a series of N-geranyl-1,2 diamine derivatives incorporating trishomocubanyl, oxa-pentacycloundecyl, pentacycloundecyl (PCU), and azapentacycloundecyl moieties.
- Screening of synthesized compounds for anti-mycobacterial activity using standard assays.
- Determination of Minimum Inhibitory Concentrations (MICs) against Mycobacterium tuberculosis H37Rv, MDR, and XDR strains.
Main Results:
- Compound 9, featuring a trishomocubanyl moiety, exhibited the highest potency with MICs ranging from 0.5-2 μg/mL against all tested TB strains.
- PCU hydroxyl derivatives (15, 23), oxa-pentacycloundecyl, and azapentacycloundecyl derivatives demonstrated anti-mycobacterial activity comparable to SQ109 (MICs: 0.5-4 μg/mL).
- All tested derivatives showed significant activity across virulent and resistant TB strains.
Conclusions:
- Novel polycyclic cage derivatives of N-geranyl-1,2 diamines possess promising anti-mycobacterial properties.
- The trishomocubanyl scaffold represents a particularly effective structural modification for enhancing anti-TB activity.
- These findings support further development of these compounds as potential new treatments for tuberculosis, including drug-resistant forms.
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