A series of compounds structurally related to aripiprazole (1), an atypical antipsychotic and antidepressant used clinically for the treatment of schizophrenia, bipolar disorder, and depression, have been prepared and evaluated for affinity at D(₂-like) dopamine receptors. These compounds also share structural elements with the classical D(₂-like) dopamine receptor antagonists, haloperidol, N-methylspiperone, domperidone and benperidol. Two new compounds, 7-(4-(4-(2-methoxyphenyl)piperazin-1-yl)butoxy)-3,4-dihydroquinolin-2(1H)-one oxalate (6) and 7-(4-(4-(2-(2-fluoroethoxy)phenyl)piperazin-1-yl)butoxy)-3,4-dihydroquinolin-2(1H)-one oxalate (7) were found to (a) bind to the D₂ receptor subtype with high affinity (K(i) values < 0.3 nM), (b) exhibit >50-fold D₂ versus D₃ receptor binding selectivity and (c) be partial agonists at both the D₂ and D₃ receptor subtype.
A series of compounds structurally related to aripiprazole (1), an atypical antipsychotic and antidepressant used clinically for the treatment of n class="Disease">schizophrenia, bipolar disorder, and depression, have been prepared and evaluated for affinity at D(₂-like) dopamine receptors. These compounds also share structural elements with the classical D(₂-like) dopamine receptor antagonists, haloperidol, N-methylspiperone, domperidone and benperidol. Two new compounds, 7-(4-(4-(2-methoxyphenyl)piperazin-1-yl)butoxy)-3,4-dihydroquinolin-2(1H)-one oxalate (6) and 7-(4-(4-(2-(2-fluoroethoxy)phenyl)piperazin-1-yl)butoxy)-3,4-dihydroquinolin-2(1H)-one oxalate (7) were found to (a) bind to the D₂ receptor subtype with high affinity (K(i) values < 0.3 nM), (b) exhibit >50-fold D₂ versus D₃ receptor binding selectivity and (c) be partial agonists at both the D₂ and D₃ receptor subtype.
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