Fluorosulfonyl-Substituted Xanthines as Selective Irreversible Antagonists for the A<sub>1</sub>-Adenosine Receptor
作者:Anthony R. Beauglehole、Stephen P. Baker、Peter J. Scammells
DOI:10.1021/jm000181f
日期:2000.12.1
FSCPX (1) has been reported to be a potent, selective, and irreversible antagonist for the A(1)-adenosine receptor (AR). To obtain an irreversible A(1)AR antagonist with potentially better stability and to further elucidate the effects of linker structure on the pharmacological characteristics, several new analogues were targeted in which the labile ester linkage of 1 was replaced by more stable functionalities. In particular, alkyl and:amide linkers between the xanthine pharmacophore and the reactive 4-fluorosulfonylphenyl group were explored. The data showed that the chemical composition of the linker affects the affinity and apparent irreversible binding to the A(1)AR. Overall, compound 23b appeared to have the most advantageous characteristics as a potential irreversible ligand for the A(1)AR. These include relatively high affinity for the A(1)AR. as compared to the A(2A)AR, concentration-dependent and selective apparent irreversible binding to the A(1)AR, and ease;of removal of unbound ligand from biological membranes. These :properties indicate that 23b has the potential to be a useful tool for further study of the structure and function of the A(1)AR.
New irreversible adenosine A1 antagonists based on FSCPX
作者:Anthony R Beauglehole、Stephen P Baker、Peter J Scammells
DOI:10.1016/s0960-894x(02)00639-x
日期:2002.11
FSCPX (1) and its amide analogue (2) have been reported to exhibit potent and selective irreversible antagonism of the A(1) adenosine receptor (A(1)AR) when used in in vitro biologicalpreparations. In order to obtain an irreversible A(1)AR antagonist with improved stability, analogues of FSCPX incorporating the chemoreactive 4-(fluorosulfonyl)phenyl moiety separated from the xanthine pharmacophore