3- [2- [4-(4-Fluorobenzoyl)piperidin- 1-yl]ethyl] -5,6,7,8-tetrahydro-4(3H)-quinazolinones: serotonin 5-HT2A receptor antagonists endowed with potent central action
摘要:
A series of 5,6,7,8-tetrahydro-4(3H)-quinazolinones substituted at the 3-position with 4-benzoyl-1-ethylpiperidine, 4-(4-fluorobenzoyl)-1-ethylpiperidine, 4-[bis-(4-fluorophenyl)methylene]-1-ethylpiperidine, or 4-(4-fluorophenyl)-1-propylpiperazine have been prepared and evaluated in binding assays to determine their affinity at serotonin 5-HT2A receptors as well as in a functional test, ie, wet dog shakes (WDS) induced by L-5-hydroxytryptophan (L-5-HTP), a behavioural response which is mediated by stimulation of 5-HT receptors. Among the compounds prepared. 3-[2-[4-(4-fluorobenzoyl)piperidin-1-yl]ethyl]-5,6,7,8-tetrahydro-4(3H)-quinazolinone (10b) and 2-methyl-3-[2-[4-(4-fluorobenzoyl)piperidin-1-yl]ethyl]-5,6,7,8-tetrahydro-4(3H)-quinazolinone (10b) proved to be the most potent 5-HT,, receptor antagonists. In binding assays, the two compounds displayed similar affinity for 5-HT, receptors in the nanomolar range to ketanserin and ritanserin. In the WDS test, they were even more potent than ketanserin and ritanserin. Compound 10b, which was found to possess the highest potency and duration of action in the WDS test, was chosen for a preliminary evaluation of its ability to inhibit ethanol intake in rats, a response linked to blockade of the central 5-HT2A, receptors. This compound significantly reduced ethanol intake in rats from the first day of treatment. The results of the present study indicate that 10b is a potent centrally acting antagonist at 5-HT2A receptors.
3- [2- [4-(4-Fluorobenzoyl)piperidin- 1-yl]ethyl] -5,6,7,8-tetrahydro-4(3H)-quinazolinones: serotonin 5-HT2A receptor antagonists endowed with potent central action
摘要:
A series of 5,6,7,8-tetrahydro-4(3H)-quinazolinones substituted at the 3-position with 4-benzoyl-1-ethylpiperidine, 4-(4-fluorobenzoyl)-1-ethylpiperidine, 4-[bis-(4-fluorophenyl)methylene]-1-ethylpiperidine, or 4-(4-fluorophenyl)-1-propylpiperazine have been prepared and evaluated in binding assays to determine their affinity at serotonin 5-HT2A receptors as well as in a functional test, ie, wet dog shakes (WDS) induced by L-5-hydroxytryptophan (L-5-HTP), a behavioural response which is mediated by stimulation of 5-HT receptors. Among the compounds prepared. 3-[2-[4-(4-fluorobenzoyl)piperidin-1-yl]ethyl]-5,6,7,8-tetrahydro-4(3H)-quinazolinone (10b) and 2-methyl-3-[2-[4-(4-fluorobenzoyl)piperidin-1-yl]ethyl]-5,6,7,8-tetrahydro-4(3H)-quinazolinone (10b) proved to be the most potent 5-HT,, receptor antagonists. In binding assays, the two compounds displayed similar affinity for 5-HT, receptors in the nanomolar range to ketanserin and ritanserin. In the WDS test, they were even more potent than ketanserin and ritanserin. Compound 10b, which was found to possess the highest potency and duration of action in the WDS test, was chosen for a preliminary evaluation of its ability to inhibit ethanol intake in rats, a response linked to blockade of the central 5-HT2A, receptors. This compound significantly reduced ethanol intake in rats from the first day of treatment. The results of the present study indicate that 10b is a potent centrally acting antagonist at 5-HT2A receptors.
Heterocyclic compound having serotonine 2-receptor antagonistic activity
申请人:Daiichi Pharmaceutical Co., Ltd.
公开号:US05232924A1
公开(公告)日:1993-08-03
A heterocyclic compound represented by formula (I): ##STR1## wherein R.sup.1 represents a hydrogen atom, an alkyl group, an aryl group which may be substituted with one or more substituents selected from the group consisting of a halogen atom, an alkoxy group, an alkyl group and a trihalogenomethyl group; .lambda. represents 0 or 1; ring A represents a 6 membered heterocyclic ring containing the nitrogen atom shared with the triazine ring and which may contain one or more double bonds; Y represents a substituted or unsubstituted alkylene group having 1 to 15 carbon atoms; and Q represents a group represented by formula (II): ##STR2## wherein R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are represented by substituents disclosed herein; or salt thereof, and intermediates therefor are described. The compound of formula (I) or salt thereof exhibit selective serotonin 2-receptor antagonistic activity and are useful for the prevention or treatment of circulatory diseases, e.g., ischemic heart diseases, cerebral vessel disturbances, and peripheral circulation disturbances.
2,4-triazol-3(2H)-one and 1,3,5-triazine-2,4(3H)-dione derivatives with a 4-[bis(4-fluoro-phenyl)methylene]piperidine or 4-(4-fluorobenzoyl)piperidine group has been prepared and tested for 5-HT2 and alpha 1 receptor antagonist activity. Among the compounds prepared, 2-[2-[4-[bis(4-fluorophenyl)methylene]-piperidin-1-yl]ethyl]- 5,6,7,8-tetrahydro-1,2,4-triazolo[4,3-a]pyridin-3(2H)-one (7b) had the most
Simplified analogues of ritanserin and their affinity at 5-HT2A, 5-HT2B and 5-HT2C serotonin receptors
作者:Francesco Claudi、Loredana Scoccia、Gianfabio Giorgioni、Gabriella Marucci、Antonio Di Stefano、Stefania Gessi、Anna Siniscalchi、Pier Andrea Borea
DOI:10.1016/s0223-5234(98)80029-9
日期:1998.9
The 5-HT2 serotonin antagonist ritanserin (6-2-[4-[bis(4-fluorophenyl)methylene]-1-piperidinyl]ethyl}-7-methyl-5H-thiazole[3,2-a]pyrimidin-5-one, 2) binds with high affinity to 5-HT2A, 5-HT2B and 5-HT2C serotonin receptors. With the aim of exploring how simplification of the thiazolepyrimidinone nucleus of 2 affects the affinity and selectivity for 5-HT2A, 5-HT2B and 5-HT2C subtypes, some derivatives of 4-[bis(4-fluorophenyl)methylene]piperidine were synthesized, and their 5-HT2A and 5-HT2C receptor binding affinities and 5-HT2B antagonistic affinity evaluated. The new compounds bind the three 5-HT2 subtypes with lower affinity than did 2. Simplification of the thiazolepyrimidinone nucleus of ritanserin has only slight influence on the selectivity for 5-HT2 subtypes. The results suggest that the thiazolepyrimidinone moiety participates in key binding interactions and is determinant for high affinity at 5-HT2 receptor subtypes. Some derivatives showed antagonistic activity at 5-HT2A receptor. (C) Elsevier, Paris.
Heterocyclic triazin or triazolo compounds having serotonin 2-receptor antagonistic activity