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1
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Coupar IM, Irving HR, Manallack DT, Tan YY, Ayad F, Iulio JD, Tochon-Danguy N, Iskander MN. Assessment of the pharmacological properties of 5-methoxyindole derivatives at 5-HT4 receptors. J Pharm Pharmacol 2012; 64:1099-106. [DOI: 10.1111/j.2042-7158.2012.01500.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Abstract
Objectives
The aim was to examine the biological activity of 5-methoxytryptamine derivatives at the 5-hydroxytryptamine (5-HT)4 receptor to explore the effect of substitution on the aliphatic amine of the 5-methoxyamine scaffold.
Methods
Three compounds were tested for affinity at the 5-HT4 receptor by radioligand binding and functional activity using guinea-pig ileum and human colon circular muscle preparations and also in the mouse whole gut transit test.
Key findings
The three compounds all had agonist properties at the 5-HT4 receptor but their efficacy differed in the different functional tests. Compound 3 had the highest affinity for the 5-HT4 receptor and was a full agonist at relaxing human colon circular muscle with efficacy closest to 5-HT. Compounds 1 and 2 were partial agonists in this assay with lower efficacies; compound 2 was a full agonist in the guinea-pig ileum assay whereas compound 3 was a partial agonist. Compounds 1 and 2 also showed activity in the mouse gut transit assay while compound 3 had no activity.
Conclusions
Of the compounds tested, compound 3 was the most promising 5-HT4 receptor agonist and the results highlight the value of using human tissue in functional tests when assessing compounds for potential activity.
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Affiliation(s)
- Ian M Coupar
- Medicinal Chemistry and Drug Action, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville Campus, Parkville, Vic., Australia
| | - Helen R Irving
- Medicinal Chemistry and Drug Action, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville Campus, Parkville, Vic., Australia
| | - David T Manallack
- Medicinal Chemistry and Drug Action, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville Campus, Parkville, Vic., Australia
| | - Yean Y Tan
- Medicinal Chemistry and Drug Action, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville Campus, Parkville, Vic., Australia
| | - Fadi Ayad
- Medicinal Chemistry and Drug Action, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville Campus, Parkville, Vic., Australia
| | - Juliana Di Iulio
- Medicinal Chemistry and Drug Action, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville Campus, Parkville, Vic., Australia
| | - Nathalie Tochon-Danguy
- Medicinal Chemistry and Drug Action, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville Campus, Parkville, Vic., Australia
| | - Magdy N Iskander
- Medicinal Chemistry and Drug Action, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville Campus, Parkville, Vic., Australia
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Shen Y, Sheng R, Zhang J, He Q, Yang B, Hu Y. 2-Phenoxy-indan-1-one derivatives as acetylcholinesterase inhibitors: A study on the importance of modifications at the side chain on the activity. Bioorg Med Chem 2008; 16:7646-53. [DOI: 10.1016/j.bmc.2008.07.014] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2008] [Revised: 07/03/2008] [Accepted: 07/04/2008] [Indexed: 10/21/2022]
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3
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Jiao J, Nguyen LX, Patterson DR, Flowers RA. An efficient and general approach to beta-functionalized ketones. Org Lett 2007; 9:1323-6. [PMID: 17335227 PMCID: PMC2593908 DOI: 10.1021/ol070159h] [Citation(s) in RCA: 117] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[structure: see text]. The oxidation of selected anions (N3-, SCN-, I-, and Br-) by ceric ammonium nitrate (CAN) in the presence of substituted cyclopropyl alcohols provides a novel approach to beta-functionalized ketones. The protocol has a number of advantages including short reaction times, ease of reagent handling, and mild, neutral reaction conditions. Overall, this method provides an alternative pathway to important starting materials and intermediates in organic synthesis.
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4
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Sonda S, Kawahara T, Katayama K, Sato N, Asano K. Synthesis and pharmacological evaluation of benzamide derivatives as selective 5-HT4 receptor agonists. Bioorg Med Chem 2005; 13:3295-308. [PMID: 15809165 DOI: 10.1016/j.bmc.2005.02.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2004] [Revised: 02/08/2005] [Accepted: 02/09/2005] [Indexed: 10/25/2022]
Abstract
It is thought that selective 5-HT(4) receptor agonists-such as 4-amino-5-chloro-2-methoxy-N-[1-(6-oxo-6-phenylhexyl)piperidin-4ylmethyl]benzamide (2)-have the ability to enhance both upper and lower gastrointestinal motility without any significant adverse effects. Modification of 2 was performed. Variation of the piperidin-4ylmethyl moiety of 2 led to a decrease in the binding affinity for the 5-HT(4) receptor. Following conversion of the carbonyl group on the benzoyl part to a hydroxyl or sulfoxide group, the binding affinity for the 5-HT(4) receptor was retained although the effect on defecation was reduced. Many of the 4-amino-5-chloro-2-methoxy-N-(piperidin-4ylmethyl)benzamides that had a ether or sulfide moiety in the side-chain part at the 1-position of the piperidine exhibited high affinity for the 5-HT(4) receptor. Among these, phenylthio 41c and benzylthio derivative 44 were selective 5-HT(4) receptor agonists, and had a similar effect on defecation to compound 2.
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Affiliation(s)
- Shuji Sonda
- Pharmaceutical Development Laboratories, Technology and Production Division, Mitsubishi Pharma Corporation, 14 Sunayama, Hasaki-machi, Kashima-gun, Ibaraki 314-0255, Japan.
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5
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Recent Advances in Selective Serotonergic Agents. ANNUAL REPORTS IN MEDICINAL CHEMISTRY 2005. [DOI: 10.1016/s0065-7743(05)40002-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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