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    C3 amino-substituted chalcone derivative with selective adenosine rA1 receptor affinity in the micromolar range

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    Date
    2020
    Author
    Janse van Rensburg, Helena D.
    Legoabe, Lesetja J.
    Terre'Blanche, Gisella
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    Abstract
    To identify novel adenosine receptor (AR) ligands based on the chalcone scaffold, herein the synthesis, characterization and in vitro and in silico evaluation of 33 chalcones (15–36 and 37–41) and structurally related compounds (42–47) are reported. These compounds were characterized by radioligand binding and GTP shift assays to determine the degree and type of binding affinity, respectively, against rat (r) A1 and A2A ARs. The chalcone derivatives 24, 29, 37 and 38 possessed selective A1 affinity below 10 µM, and thus, are the most active compounds of the present series; compound 38 was the most potent selective A1 AR antagonist (Ki (r) = 1.6 µM). The structure–affinity relationships (SAR) revealed that the NH2-group at position C3 of ring A of the chalcone scaffold played a key role in affinity, and also, the Br-atom at position C3′ on benzylidene ring B. Upon in vitro and in silico evaluation, the novel C3 amino-substituted chalcone derivative 38—that contains an α,ß-unsaturated carbonyl system and easily allows structural modification—may possibly be a synthon in future drug discovery
    URI
    http://hdl.handle.net/10394/36458
    https://link.springer.com/article/10.1007/s11696-020-01414-9
    https://doi.org/10.1007/s11696-020-01414-9
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