Discovery and biological profile of 4-(1-aryltriazol-4-yl)-tetrahydropyridines as an orally active new class of metabotropic glutamate receptor 1 antagonist

We describe here the discovery and the structure-activity relationship (SAR) of a series of 4-(1-Aryl-triazol-4- yl)-tetrahydropyridines as novel mGluR1 antagonists. Our extensive chemical modi. cation of lead compound 2 successfully led to fluoropyridine analogs 7j and 1 with improved in vivo antagonistic activities. Among the evaluated compounds, chemically stable urea analog 1 showed oral antagonistic activity at dose ranges of 10-30 mg/kg in an animal model. (C) 2008 Elsevier Ltd. All rights reserved.