[1,2,4]TRIAZOLO[1,5-c]PYRIMIDINE DERIVATIVES

摘要

Ä1,2,4ÜTriazoloÄ1,5-cÜpyrimidine derivatives represented by formula (I) or pharmaceutically acceptable salts thereof are provided, which have adenosine A2A receptor antagonism and are useful for the treatment or prevention of various diseases induced by hyperactivity of adenosine A2A receptors (for example, Parkinson's disease or senile dementia): <CHEM> wherein R<1> represents substituted or unsubstituted aryl, or the like; R<2> represents hydrogen, halogen, lower alkyl, substituted or unsubstituted aryl, or the like; R<3> represents hydrogen, halogen, XR<10> (wherein X represents O or S; and R<10> represents substituted or unsubstituted aryl, a substituted or unsubstituted aromatic heterocyclic ring, substituted or unsubstituted aralkyl, lower alkyl, or hydroxy lower alkyl), or the like; and Q represents hydrogen or 3,4-dimethoxybenzyl.