4.7 Article

5-substituted 2-aminothiophenes as A1 adenosine receptor allosteric enhancers

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BIOORGANIC & MEDICINAL CHEMISTRY
卷 16, 期 3, 页码 1319-1327

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PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bmc.2007.10.065

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  1. NHLBI NIH HHS [R01HL56111] Funding Source: Medline

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Two series of 5-substituted 2-amino-4-(3-trifluoromethylphenyl)thiophenes were prepared and evaluated as allosteric enhancers at the A(1) adenosine receptor (A(1)AR). In the 3-benzoyl series, a 5-phenyl group was found to confer the greatest potency (9a: ED50 = 2.1 mu M, AE score = 18%). However, the analogue with no 5-substituent (6b: ED50 = 15.8 mu M, AE score = 77%) proved to be the most efficacious. In the 3-ethoxycarbonyl series, the 5-(4-chlorophenyl) analogue was clearly the most potent and efficacious (91: ED50 = 6.6 mu M, AE score = 57%). The antagonist activity of all compounds was measured using a [H-3]CPX competitive binding assay. (c) 2007 Elsevier Ltd. All rights reserved.

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