Discovery of a New Nucleoside Template for Human A<sub>3</sub> Adenosine Receptor Ligands: <scp>d</scp>-4‘-Thioadenosine Derivatives without 4‘-Hydroxymethyl Group as Highly Potent and Selective Antagonists
作者:Lak Shin Jeong、Seung Ah Choe、Prashantha Gunaga、Hea Ok Kim、Hyuk Woo Lee、Sang Kook Lee、Dilip K. Tosh、Amit Patel、Krishnan K. Palaniappan、Zhan-Guo Gao、Kenneth A. Jacobson、Hyung Ryong Moon
DOI:10.1021/jm070259t
日期:2007.7.1
Truncated D-4'-thioadenosine derivatives lacking the 4'-hydroxymethylene moiety were synthesized starting from D-mannose, using cyclization to the 4-thiosugar and one-step conversion of the diol to the acetate as key steps. At the human A(3) adenosine receptor (AR), N(6)-substituted purine analogues bound potently and selectively and acted as antagonists in a cyclic AMP functional assay. An N(6)-(3-chlorobenzyl)purine analogue 9b displayed a K(i) value of 1.66 nM at the human A(3) AR. Thus, truncated D-4'-thioadenosine is an excellent template for the design of novel A(3) AR antagonists to act at both human and murine species.