Synthesis and biological evaluation of 1,8-naphthyridin-4(1H)-on-3-carboxamide derivatives as new ligands of cannabinoid receptors
作者:Pier Luigi Ferrarini、Vincenzo Calderone、Tiziana Cavallini、Clementina Manera、Giuseppe Saccomanni、Luca Pani、Stefania Ruiu、Gian Luigi Gessa
DOI:10.1016/j.bmc.2004.01.035
日期:2004.4
affinity for the CB(2) receptor than for the CB(1) receptor. In particular, derivatives 6a and 7a possess an appreciable affinity for the CB(2) receptor, with K(i) values of 5.5 and 8.0 nM respectively; also compounds4a, 5a and 8a exhibit a good CB(2) affinity, with K(i) values in the range of 10-44 nM. Furthermore, compounds 3g-i and 18 revealed a good CB(2) selectivity, with a CB(1)/CB(2) ratio >20.
8-naphthyridine derivatives bearing various substituents in position3, 4, and 7 of the heterocyclicnucleus have been synthesized and evaluated for their affinity at the bovine and human adenosine receptors. The new compounds were found to lack the affinity toward A(1)AR, whereas many of them are able to acquire an interesting affinity and selectivity for the A(2A)AR.