摘要:
Novel D- and L-4'-thioadenosine derivatives lacking the 4'-hydroxymethyl moiety were synthesized, starting from D-mannose and D-gulonic gamma-lactone, respectively, as potent and selective species-independent A(3) adenosine receptor (AR) antagonists. Among the novel 4'-truncated 2-H nucleosides tested, a N-6-(3-chlorobenzyl) derivative 7c was the most potent at the human A(3) AR (K-i = 1.5 nM), but a N-6-(3-bromobenzyl) derivative 7d showed the optimal species-independent binding affinity.