Novel Diamino Derivatives of [1,2,4]Triazolo[1,5-a][1,3,5]triazine as Potent and Selective Adenosine A<sub>2a</sub> Receptor Antagonists
作者:Chi B. Vu、Deborah Pan、Bo Peng、Gnanasambandam Kumaravel、Glenn Smits、Xiaowei Jin、Deepali Phadke、Thomas Engber、Carol Huang、Jennifer Reilly、Stacy Tam、Donna Grant、Gregg Hetu、Russell C. Petter
DOI:10.1021/jm0498396
日期:2005.3.1
Piperazine derivatives of 2-furanyl[1,2,4]triazolo[1,5-a][1,3,5]triazine have recently been demonstrated to be potent and selective adenosine A(2a) receptor antagonists with oral activity in rodent models of Parkinson's disease. We have replaced the piperazinyl group with a variety of linear, monocyclic, and bicyclic diamines. Of these diamines, (R)-2-(aminomethyl)pyrrolidine is a particularly potent and selective replacement for the piperazinyl group. With this diamine component, we have been able to prepare numerous analogues with low nanomolar affinity toward the A(2a) receptor and good selectivity with respect to the A(1) receptor (> 200-fold in some cases). Selected analogues from this series of [1,2,4]triazolo[1,5-a][1,3,5]triazine have now been shown to be orally active in the mouse catalepsy model.