Design,synthesis and binding affinity of 3'-fluoro analogues of Cl-IB-MECA as adenosine A3 receptor ligands |
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Authors: | Lim Moo Hong Kim Hea Ok Moon Hyung Ryong Lee Seung Jin Chun Moon Woo Gao Zhan-Guo Melman Neli Jacobson Kenneth A Kim Joong Hyup Jeong Lak Shin |
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Affiliation: | College of Pharmacy, Seoul National University, Seoul 151-742, South Korea. |
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Abstract: | Several 3'-fluoro analogues, 1a, 1b, and 1c of selective and potent adenosine A(3) receptor agonist, Cl-IB-MECA were synthesized from D-xylose via highly regioselective opening of lyxo-epoxides, 8a and 8b with fluoride anion. Compared to the high binding affinity of Cl-IB-MECA to the A(3) adenosine receptor, the corresponding 3'-fluoro derivative showed remarkably decreased binding affinity, indicating that 3'-hydroxyl group acts as hydrogen bonding acceptor, not hydrogen bonding donor like fluorine atom in binding to the A(3) adenosine receptor. |
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