Synthesis and functional activity of (2-aryl-1-piperazinyl)N-(3-methylphenyl)acetamides:: selective dopamine D4 receptor agonists

Diaryl piperazine acetamides were identified as potent and selective dopamine D-4 receptor agonists. Our strategy is based on an amide bond reversal of an acid sensitive, dopamine D4 receptor partial agonist, PD 168077. This reversal provided compounds with excellent potency and improved stability. Systematic evaluation of the substitution on the aryl piperazine portion revealed a significant effect on functional activity. The synthesis and biological activity of these new dopamine D4 agonists is discussed. (C) 2004 Elsevier Ltd. All rights reserved.