A Solution-Phase Combinatorial Synthesis of Selective Dopamine D4 Ligands

Utilizing combinatorial synthesis and a preparative LC-MS automated chromatography system we have prepared and purified a library of 4-(2-(1,2,4-oxadiazolyl)piperidines that were designed to be novel and selective dopamine D4 ligands. In one round of synthesis we identified N-4-chlorobenzyl-4-(2-(3-(2-thienyl)-1,2,4-oxadiazolyl))piperidine with a Kd of 5 nM for the human D4 receptor