Design, synthesis and evaluation of N6-substituted 2-aminoadenosine-5'-N-methylcarboxamides as A3 adenosine receptor agonists

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A series of N6-substituted 2-aminoadenosine-5 -N- methylcarboxamides were synthesized from the versatile intermediate, O 6-(benzotriazol-1-yl)-2-amino-2 ,3 -O- isopropylideneinosine-5 -N-methylcarboxamide (1). These compounds were evaluated as A3 adenosine receptor agonists in terms of their potency and receptor sub-type selectivity in a cAMP accumulation assay and a number of potent and selective compounds were identified. One such compound, 2-amino-N6-(3-chlorobenzyl)adenosine-5 -N-methylcarboxamide (3i), was over 500-fold selective for the A3AR over the other three adenosine receptor subtypes. This represents a significantly greater selectivity profile compared with the prototypical IB-MECA.
Original languageEnglish
Pages (from-to)192 - 196
Number of pages5
Issue number2
Publication statusPublished - 2014

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