Optimization of arylindenopyrimidines as potent adenosine A2A/A1 antagonists

Two reactive metabolites were identified in vivo for the dual A(2A)/A(1) receptor antagonist 1. Two strategies were implemented to successfully mitigate the metabolic liabilities associated with 1. Optimization of the arylindenopyrimidines led to a number of amide, ether, and amino analogs having comparable in vitro and in vivo activity. (C) 2010 Elsevier Ltd. All rights reserved.