The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Revised Pharmacophore Model for 5-HT2A Receptor Antagonists Derived from the Atypical Antipsychotic Agent Risperidone》. Authors are Shah, Urjita H.; Gaitonde, Supriya A.; Moreno, Jose L.; Glennon, Richard A.; Dukat, Malgorzata; Gonzalez-Maeso, Javier.The article about the compound:Piperidine-3-carboxylic acidcas:498-95-3,SMILESS:O=C(C1CNCCC1)O).Name: Piperidine-3-carboxylic acid. Through the article, more information about this compound (cas:498-95-3) is conveyed.
Pharmacophore models for 5-HT2A receptor antagonists consist of two aromatic/hydrophobic regions at a given distance from a basic amine. We have previously shown that both aromatic/hydrophobic moieties are unnecessary for binding or antagonist action. Here, we deconstructed the 5-HT2A receptor antagonist/serotonin-dopamine antipsychotic agent risperidone into smaller structural segments that were tested for 5-HT2A receptor affinity and function. We show, again, that the entire risperidone structure is unnecessary for retention of affinity or antagonist action. Replacement of the 6-fluoro-3-(4-piperidinyl)-1,2-benz[d]isoxazole moiety by isosteric tryptamines resulted in retention of affinity and antagonist action. Addnl., 3-(4-piperidinyl)-1,2-benz[d]isoxazole (10), which represents less than half the structural features of risperidone, retains both affinity and antagonist actions. 5-HT2A receptor homol. modeling/docking studies suggest that 10 binds in a manner similar to risperidone and that there is a large cavity to accept various N4-substituted analogs of 10 such as risperidone and related agents. Alterations of this “”extended”” moiety improve receptor binding and functional potency. We propose a new risperidone-based pharmacophore for 5-HT2A receptor antagonist action.
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