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Eckl R, Fischer S, Sonnleitner CM, Schmidhuber D, Rehbein J, Reiser O. Stereoselective Synthesis of Biologically Relevant Tetrahydropyridines and Dihydro-2 H-pyrans via Ring-Expansion of Monocyclopropanated Heterocycles. ACS ORGANIC & INORGANIC AU 2021; 2:169-174. [PMID: 36855453 PMCID: PMC9954292 DOI: 10.1021/acsorginorgau.1c00042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A stereoselective, scalable, and metal-free ring-expansion of monocyclopropanated pyrroles and furans has been developed, leading to value-added highly functionalized tetrahydropyridine and dihydro-2H-pyran derivatives. Featuring a cyclopropylcarbinyl cation rearrangement as the key step, the selective cleavage of the unactivated endocyclic cyclopropane C-C bond is achieved. Targeted transformations of the thus obtained six-membered heterocycles give access to versatile building blocks with relevance for drug synthesis.
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Thaxton A, Izenwasser S, Wade D, Stevens ED, Mobley DL, Jaber V, Lomenzo SA, Trudell ML. 3-Aryl-3-arylmethoxyazetidines. A new class of high affinity ligands for monoamine transporters. Bioorg Med Chem Lett 2013; 23:4404-7. [PMID: 23806554 DOI: 10.1016/j.bmcl.2013.05.071] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Revised: 05/15/2013] [Accepted: 05/20/2013] [Indexed: 10/26/2022]
Abstract
A series of 3-aryl-3-arylmethoxy-azetidines were synthesized and evaluated for binding affinities at dopamine and serotonin transporters. The 3-aryl-3-arylmethoxyazetidines were generally SERT selective with the dichloro substituted congener 7c (Ki=1.0 nM) and the tetrachloro substituted derivative 7i (Ki=1.3 nM) possessing low nanomolar affinity for the SERT. The 3-(3,4-dichlorophenyl-3-phenylmethoxyazetidine (7g) exhibited moderate affinity at both DAT and SERT transporters and suggests that substitution of the aryl rings can be used to tune the mononamine transporter affinity.
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Affiliation(s)
- Amber Thaxton
- Department of Chemistry, University of New Orleans, New Orleans, LA 70148, USA
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Sun L, Bera H, Chui WK. Synthesis of pyrazolo[1,5-a][1,3,5]triazine derivatives as inhibitors of thymidine phosphorylase. Eur J Med Chem 2013; 65:1-11. [PMID: 23688695 DOI: 10.1016/j.ejmech.2013.03.063] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Revised: 03/21/2013] [Accepted: 03/28/2013] [Indexed: 10/27/2022]
Abstract
Thymidine phosphorylase (TP) is an enzyme that promotes tumor growth and metastasis and therefore is an attractive druggable target. Using a reported TP inhibitor, 7-deazaxanthine (7DX), as the lead compound; this study was set up to evaluate whether pyrazolo[1,5-a][1,3,5]triazin-2,4-diones and pyrazolo[1,5-a][1,3,5]triazin-2-thioxo-4-ones would exhibit TP inhibitory activity. The pyrazolo[1,5-a][1,3,5]triazine nucleus was constructed using a reaction that annulated the 1,3,5-triazine ring onto a pyrazole scaffold. Among the 52 compounds synthesized and tested, it was found that 1,3-dihydro-pyrazolo[1,5-a][1,3,5]triazin-2-thioxo-4-ones exhibited various extent of inhibitory activity against TP. The best compound 17p, which bears a para-substituted pentafluorosulfur group, showed an IC50 value of 0.04 μM, which was around 800 times more potent than the 7DX (IC50 = 32 μM) under the same bioassay conditions. The results of the study suggested that a substituent with +σ and +π properties inserted at position 4 of a phenyl ring that is attached to position 8 of the pyrazolo[1,5-a][1,3,5]triazin-2-thioxo-4-one scaffold would give excellent TP inhibitory action. In addition, 17p was found to be a non-competitive inhibitor thus suggested that it might interact with TP at a position different from the substrate binding site.
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Affiliation(s)
- Lingyi Sun
- Department of Pharmacy, Faculty of Science, National University of Singapore, 18 Science Drive 4, Singapore 117543, Singapore.
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Cararas SA, Izenwasser S, Wade D, Housman A, Verma A, Lomenzo SA, Trudell ML. Further structure-activity relationship studies on 8-substituted-3-[2-(diarylmethoxyethylidenyl)]-8-azabicyclo[3.2.1]octane derivatives at monoamine transporters. Bioorg Med Chem 2011; 19:7551-8. [PMID: 22055716 PMCID: PMC3230044 DOI: 10.1016/j.bmc.2011.10.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2011] [Revised: 10/05/2011] [Accepted: 10/10/2011] [Indexed: 11/23/2022]
Abstract
The synthesis and structure-activity relationships of 8-substituted-3-[2-(diarylmethoxyethylidenyl)]-8-azabicyclo[3.2.1]octane derivatives were investigated at the dopamine transporter (DAT), the serotonin transporter (SERT) and norepinephrine transporter (NET). The rigid ethylidenyl-8-azabicyclic[3.2.1]octane skeleton imparted modestly stereoselective binding and uptake inhibition at the DAT. Additional structure-activity studies provided a transporter affinity profile that was reminiscent of the structure-activity of GBR 12909. From these studies, the 8-cyclopropylmethyl group has been identified as a unique moiety that imparts high SERT/DAT selectivity. In this study the 8-cyclopropylmethyl derivative 22e (DAT K(i) of 4.0 nM) was among the most potent compounds of the series at the DAT and was the most DAT selective ligand of the series (SERT/DAT: 1060). Similarly, the 8-chlorobenzyl derivative 22g (DAT K(i) of 3.9 nM) was found to be highly selective for the DAT over the NET (NET/DAT: 1358).
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Affiliation(s)
- Shaine A. Cararas
- Department of Chemistry, University of New Orleans, New Orleans, LA 70148
| | - Sari Izenwasser
- Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL 33136
| | - Dean Wade
- Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL 33136
| | - Amy Housman
- Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL 33136
| | - Abha Verma
- Department of Chemistry, University of New Orleans, New Orleans, LA 70148
| | - Stacey A. Lomenzo
- Department of Chemistry, University of New Orleans, New Orleans, LA 70148
| | - Mark L. Trudell
- Department of Chemistry, University of New Orleans, New Orleans, LA 70148
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Liras S, McHardy SF, Allen MP, Segelstein BE, Heck SD, Bryce DK, Schmidt AW, O'Connor R, Vanase-Frawley M, Callegari E, McLean S. Discovery and pharmacological characterization of a selective delta opiate receptor antagonist (CP-646,777). MEDCHEMCOMM 2011. [DOI: 10.1039/c0md00249f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Gu X, Izenwasser S, Wade D, Housman A, Gulasey G, Rhoden JB, Savoie CD, Mobley DL, Lomenzo SA, Trudell ML. Synthesis and structure-activity studies of benzyl ester meperidine and normeperidine derivatives as selective serotonin transporter ligands. Bioorg Med Chem 2010; 18:8356-64. [PMID: 20980153 PMCID: PMC3713777 DOI: 10.1016/j.bmc.2010.09.060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2010] [Revised: 09/21/2010] [Accepted: 09/23/2010] [Indexed: 10/19/2022]
Abstract
A series of benzyl esters of meperidine and normeperidine were synthesized and evaluated for binding affinity at serotonin, dopamine and norepinephrine transporters. The 4-methoxybenzyl ester 8b and 4-nitrobenzyl ester 8c in the meperidine series and 4-methoxybenzyl ester 14a in the normeperidine series exhibited low nanomolar binding affinities at the SERT (K(i) values <2nM) and high SERT selectivity (DAT/SERT >1500 and NET/SERT >1500).
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Affiliation(s)
- Xiaobo Gu
- Department of Chemistry, University of New Orleans, New Orleans, LA 70148, USA
| | - Sari Izenwasser
- Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami FL 33136, USA
| | - Dean Wade
- Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami FL 33136, USA
| | - Amy Housman
- Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami FL 33136, USA
| | - Gerard Gulasey
- Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami FL 33136, USA
| | - Jill B. Rhoden
- Department of Chemistry, University of New Orleans, New Orleans, LA 70148, USA
| | | | - David L. Mobley
- Department of Chemistry, University of New Orleans, New Orleans, LA 70148, USA
| | - Stacey A. Lomenzo
- Department of Chemistry, University of New Orleans, New Orleans, LA 70148, USA
| | - Mark L. Trudell
- Department of Chemistry, University of New Orleans, New Orleans, LA 70148, USA
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Kaur H, Izenwasser S, Verma A, Wade D, Housman A, Stevens ED, Mobley DL, Trudell ML. Synthesis and monoamine transporter affinity of 3alpha-arylmethoxy-3beta-arylnortropanes. Bioorg Med Chem Lett 2009; 19:6865-8. [PMID: 19896846 DOI: 10.1016/j.bmcl.2009.10.087] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2009] [Revised: 10/16/2009] [Accepted: 10/20/2009] [Indexed: 10/20/2022]
Abstract
A series of 3-arylnortrop-2-enes and 3alpha-arylmethoxy-3beta-arylnortropanes were synthesized and evaluated for binding affinity at monoamine transporters. The 3-(3,4-dichlorophenyl)nortrop-2-ene (6e) exhibited high affinity for the SERT (K(i)=0.3 nM). The 3alpha-arylmethoxy-3beta-arylnortropanes were generally SERT selective with the 3alpha-(3.4-dichlorophenylmethoxy)-3betaphenylnortrop-2-ene (7c) possessing subnanomolar potency (K(i)=0.061 nM). However, 3alpha-(3,4-dichlorophenylmethoxy)-3beta-phenylnortrop-2-ene (7b) exhibited high affinity at all three transporters [(DAT K(i)=22 nM), (SERT K(i)=6 nM) and (NET K(i)=101 nM)].
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Affiliation(s)
- Harneet Kaur
- Department of Chemistry, University of New Orleans, New Orleans, LA 70148, USA
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Dopamine transporter imaging with [123I]FP-CIT SPECT: potential effects of drugs. Eur J Nucl Med Mol Imaging 2007; 35:424-38. [DOI: 10.1007/s00259-007-0621-0] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2007] [Accepted: 09/26/2007] [Indexed: 01/29/2023]
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Abstract
This paper is the 28th consecutive installment of the annual review of research concerning the endogenous opioid system, now spanning over a quarter-century of research. It summarizes papers published during 2005 that studied the behavioral effects of molecular, pharmacological and genetic manipulation of opioid peptides, opioid receptors, opioid agonists and opioid antagonists. The particular topics that continue to be covered include the molecular-biochemical effects and neurochemical localization studies of endogenous opioids and their receptors related to behavior (Section 2), and the roles of these opioid peptides and receptors in pain and analgesia (Section 3); stress and social status (Section 4); tolerance and dependence (Section 5); learning and memory (Section 6); eating and drinking (Section 7); alcohol and drugs of abuse (Section 8); sexual activity and hormones, pregnancy, development and endocrinology (Section 9); mental illness and mood (Section 10); seizures and neurologic disorders (Section 11); electrical-related activity, neurophysiology and transmitter release (Section 12); general activity and locomotion (Section 13); gastrointestinal, renal and hepatic functions (Section 14); cardiovascular responses (Section 15); respiration and thermoregulation (Section 16); immunological responses (Section 17).
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Affiliation(s)
- Richard J Bodnar
- Department of Psychology and Neuropsychology Doctoral Sub-Program, Queens College, City University of New York, 65-30 Kissena Blvd., Flushing, NY 11367, USA.
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Rhoden JB, Bouvet M, Izenwasser S, Wade D, Lomenzo SA, Trudell ML. Structure-activity studies of 3'-4'-dichloro-meperidine analogues at dopamine and serotonin transporters. Bioorg Med Chem 2005; 13:5623-34. [PMID: 15993612 DOI: 10.1016/j.bmc.2005.05.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2005] [Revised: 05/18/2005] [Accepted: 05/18/2005] [Indexed: 11/16/2022]
Abstract
The structure-activity relationships of 3',4'-dichloro-meperidine were investigated at dopamine (DAT) and serotonin transporters (SERT). Large ester substituents and lipophilic groups at the 4-position favored molecular recognition at the SERT. The benzyl ester of 3',4'-dichloro-meperidine exhibited high potency and high selectivity for the SERT (DAT/SERT=760). Chemical modification of the ester group and N-substitution generally led to compounds with decreased DAT affinity. Only small esters and alkyl groups were tolerated at the 4-position of the meperidine ring system by the DAT. Overall, the meperidine analogues were generally more selective for the SERT than for the DAT.
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Affiliation(s)
- Jill B Rhoden
- Department of Chemistry, University of New Orleans, New Orleans, LA 70148, USA
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Walter MW. Monoamine reuptake inhibitors: highlights of recent research developments. Drug Dev Res 2005. [DOI: 10.1002/ddr.20013] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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