Synthesis of [1,2,4]triazolo[1,5-a]pyrazines as adenosine A2A receptor antagonists
作者:James E. Dowling、Jeffrey T. Vessels、Serajul Haque、He Xi Chang、Kurt van Vloten、Gnanasambandam Kumaravel、Thomas Engber、Xiaowei Jin、Deepali Phadke、Joy Wang、Eman Ayyub、Russell C. Petter
DOI:10.1016/j.bmcl.2005.07.052
日期:2005.11
Potent and selective antagonists of the adenosine A(2A) receptor often contain a nitrogen-rich fused-ring heterocyclic core. Replacement of the core with an isomeric ring system has previously been shown to improve target affinity, selectivity, and in vivo activity. This paper describes the preparation, by a novel route, of A(2A) receptor antagonists containing the [1,2,4]triazolo[1,5-a]pyrazine nucleus, which is isomeric with the [1,2,4]triazolo[1,5-c]pyrimidine core of a series of known A(2A) antagonists with in vivo activity in animal models of Parkinson's disease. (c) 2005 Elsevier Ltd. All rights reserved.