Medicinal chemistry optimization of antiplasmodial imidazopyridazine hits from high throughput screening of a softfocus kinase library: part 2.
J Med Chem
; 57(21): 8839-48, 2014 Nov 13.
Article
em En
| MEDLINE
| ID: mdl-25313449
ABSTRACT
On the basis of our recent results on a novel series of imidazopyridazine-based antimalarials, we focused on identifying compounds with improved aqueous solubility and hERG profile while maintaining metabolic stability and in vitro potency. Toward this objective, 41 compounds were synthesized and evaluated for antiplasmodial activity against NF54 (sensitive) and K1 (multidrug resistant) strains of the malaria parasite Plasmodium falciparum and evaluated for both aqueous solubility and metabolic stability. Selected compounds were tested for in vitro hERG activity and in vivo efficacy in the P. berghei mouse model. Several compounds were identified with significantly improved aqueous solubility, good metabolic stability, and a clean hERG profile relative to a previous frontrunner lead compound. A sulfoxide-based imidazopyridazine analog 45, arising from a prodrug-like strategy, was completely curative in the Plasmodium berghei mouse model at 4 × 50 mg/kg po.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Piridazinas
/
Sulfonas
/
Antimaláricos
Tipo de estudo:
Diagnostic_studies
/
Screening_studies
Limite:
Animals
/
Humans
/
Male
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article