Synthesis and Biological Evaluation of Metabolites of 2-n-Butyl-9-methyl-8-[1,2,3]triazol-2-yl-9H-purin-6-ylamine (ST1535), A Potent Antagonist of the A2A Adenosine Receptor for the Treatment of Parkinson’s Disease
摘要:
The synthesis and preliminary in vitro evaluation of five metabolites of the A(2A) antagonist ST1535 (1) are reported. The metabolites, originating in vivo from enzymatic oxidation of 2-butyl group of parent compound, were synthesized from 6-chloro-2-iodo-9-methyl-9H-purine (2) by selective C-C bond formation via halogen/magnesium exchange and/or palladium-catalyzed reactions. The metabolites behaved in vitro as antagonist, ligands of cloned human A(2A), receptor with affinities (K-i 7.5-53 nM) comparable to that of compound 1 (K-i 10.7 nM), thus showing that the long duration of action of 1 could be in part due to its metabolites. General behavior after oral administration in mice was also analyzed.
Synthesis and Biological Evaluation of Metabolites of 2-n-Butyl-9-methyl-8-[1,2,3]triazol-2-yl-9H-purin-6-ylamine (ST1535), A Potent Antagonist of the A2A Adenosine Receptor for the Treatment of Parkinson’s Disease
摘要:
The synthesis and preliminary in vitro evaluation of five metabolites of the A(2A) antagonist ST1535 (1) are reported. The metabolites, originating in vivo from enzymatic oxidation of 2-butyl group of parent compound, were synthesized from 6-chloro-2-iodo-9-methyl-9H-purine (2) by selective C-C bond formation via halogen/magnesium exchange and/or palladium-catalyzed reactions. The metabolites behaved in vitro as antagonist, ligands of cloned human A(2A), receptor with affinities (K-i 7.5-53 nM) comparable to that of compound 1 (K-i 10.7 nM), thus showing that the long duration of action of 1 could be in part due to its metabolites. General behavior after oral administration in mice was also analyzed.