Evaluation of structural effects on 5-HT2A receptor antagonism by aporphines: Identification of a new aporphine with 5-HT2A antagonist activity
摘要:
A set of aporphine analogs related to nantenine was evaluated for antagonist activity at 5-HT2A and alpha(1A) adrenergic receptors.With regards to 5-HT2A receptor antagonism, a C2 allyl group is detrimental to activity. The chiral center of nantenine is not important for 5-HT2A antagonist activity, however the N6 nitrogen atom is a critical feature for 5-HT2A antagonism.Compound 12b was the most potent 5-HT2A aporphine antagonist identified in this study and has similar potency to previously identified aporphine antagonists 2 and 3. The ring A and N6 modifications examined were detrimental to alpha(1A) antagonism. A slight eutomeric preference for the R enantiomer of nantenine was observed in relation to alpha(1A) antagonism. (C) 2014 Elsevier Ltd. All rights reserved.