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Naltrindole derivatives with fluorinated ethyl substituents on the 17-nitrogen as δ opioid receptor inverse agonists. Bioorg Med Chem Lett 2015; 25:2927-30. [DOI: 10.1016/j.bmcl.2015.05.038] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2015] [Revised: 05/13/2015] [Accepted: 05/18/2015] [Indexed: 11/21/2022]
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The effect of 17-N substituents on the activity of the opioid κ receptor in nalfurafine derivatives. Bioorg Med Chem Lett 2012. [PMID: 23200250 DOI: 10.1016/j.bmcl.2012.10.100] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have previously reported the essential structure of the opioid κ receptor agonist nalfurafine hydrochloride (TRK-820) for binding to the κ receptor. In the course of this study, we focused on the effect of the substituent at 17-N in nalfurafine on the binding affinity for the κ receptor. The exchange of the 17-N substituent in nalfurafine from cyclopropylmethyl to fluoro-substituted alkyl groups, which are strong electron withdrawing substituents, almost completely diminished the binding affinities for the μ and δ opioid receptors, but the binding affinity for the κ receptor was still maintained. As a result, nalfurafine derivatives with 17-fluoro-substituted alkyl groups showed higher selectivities for the κ receptor than did nalfurafine itself. With regard to the κ agonistic activities, the conversion of the 17-N substituent in nalfurafine from cyclopropylmethyl to fluoro-substituted alkyl groups led to the gradual decrease of the agonistic activities in the order corresponding to their binding affinities for the κ receptor. In contrast, the derivative with the bulky 17-isobutyl group showed lower affinity and agonistic activity for the κ receptor than the derivatives with the smaller functional groups. This research suggested that both the electronic property and the steric characteristics of the 17-N substituent would have a great influence on the binding property for the κ receptor.
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Watanabe Y, Kitazawa S, Fujii H, Nemoto T, Hirayama S, Nagase H. Design and synthesis of novel opioid ligands with an azabicyclo[2.2.2]octane skeleton and their pharmacologies. Bioorg Med Chem Lett 2012; 22:2689-92. [DOI: 10.1016/j.bmcl.2012.03.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Revised: 03/01/2012] [Accepted: 03/02/2012] [Indexed: 11/30/2022]
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Ida Y, Nemoto T, Hirayama S, Fujii H, Osa Y, Imai M, Nakamura T, Kanemasa T, Kato A, Nagase H. Synthesis of quinolinomorphinan-4-ol derivatives as δ opioid receptor agonists. Bioorg Med Chem 2012; 20:949-61. [DOI: 10.1016/j.bmc.2011.11.047] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Revised: 11/22/2011] [Accepted: 11/22/2011] [Indexed: 11/29/2022]
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Nagase H, Koyano K, Wada N, Hirayama S, Watanabe A, Nemoto T, Nakajima M, Nakao K, Mochizuki H, Fujii H. Synthesis of novel triplet drugs with 1,3,5-trioxazatriquinane skeletons and their pharmacologies. Part 2: Synthesis of novel triplet drugs with the epoxymethano structure (capped homotriplet). Bioorg Med Chem Lett 2011; 21:6198-202. [DOI: 10.1016/j.bmcl.2011.07.065] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Revised: 07/16/2011] [Accepted: 07/16/2011] [Indexed: 01/19/2023]
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Tavakol H, Esfandyari M, Taheri S, Heydari A. Investigation of structure, vibrational and NMR spectra of oxycodone and naltrexone: a combined experimental and theoretical study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 79:574-582. [PMID: 21549636 DOI: 10.1016/j.saa.2011.03.038] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2009] [Accepted: 03/14/2011] [Indexed: 05/30/2023]
Abstract
In this work, two important opioid antagonists, naltrexone and oxycodone, were prepared from thebaine and were characterized by IR, (1)H NMR and (13)C NMR spectroscopy. Moreover, computational NMR and IR parameters were obtained using density functional theory (DFT) at B3LYP/6-311++G** level of theory. Complete NMR and vibrational assignment were carried out using the observed and calculated spectra. The IR frequencies and NMR chemical shifts, determined experimentally, were compared with those obtained theoretically from DFT calculations, showed good agreements. The RMS errors observed between experimental and calculated data for the IR absorptions are 85 and 105 cm(-1), for the (1)H NMR peaks are 0.87 and 0.17 ppm and for those of (13)C NMR are 5.6 and 5.3 ppm, respectively for naltrexone and oxycodone.
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Affiliation(s)
- Hossein Tavakol
- Chemistry Department, Faculty of Science, University of Zabol, Mofatteh street, Zabol, Iran.
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Nagase H, Watanabe A, Nemoto T, Nakajima M, Hasebe K, Mochizuki H, Fujii H. Synthesis of novel triplet drugs with 1,3,5-trioxazatriquinane skeletons and their pharmacologies. 1: Synthesis of triplet drugs with morphinan skeletons. Bioorg Med Chem Lett 2011; 21:4023-6. [DOI: 10.1016/j.bmcl.2011.04.134] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 04/26/2011] [Accepted: 04/28/2011] [Indexed: 11/29/2022]
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Synthesis of 6,14-epoxymorphinan derivatives and their pharmacologies. Bioorg Med Chem 2011; 19:1205-21. [DOI: 10.1016/j.bmc.2010.12.035] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2010] [Revised: 12/09/2010] [Accepted: 12/14/2010] [Indexed: 11/23/2022]
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Nagase H, Nemoto T, Matsubara A, Saito M, Yamamoto N, Osa Y, Hirayama S, Nakajima M, Nakao K, Mochizuki H, Fujii H. Design and synthesis of KNT-127, a δ-opioid receptor agonist effective by systemic administration. Bioorg Med Chem Lett 2010; 20:6302-5. [PMID: 20850307 DOI: 10.1016/j.bmcl.2010.08.083] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Revised: 08/17/2010] [Accepted: 08/18/2010] [Indexed: 10/19/2022]
Abstract
We have reported previously the novel δ-opioid agonist, SN-28, which was more potent in in vitro assays than the prototype δ-agonists, TAN-67 and SNC-80. However, when administered by subcutaneous injection, this compound showed no analgesic effect at dosages greater than 30mg/kg in the acetic acid writhing test. We speculated that SN-28 was not effective in the test because the presence of the charged ammonium groups prevented its penetration through the blood-brain barrier. On the basis of our proposal, we designed the novel δ-agonist, KNT-127, which was effective with systemic administration.
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Affiliation(s)
- Hiroshi Nagase
- School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-ku, Tokyo 108-8641, Japan.
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Adsorption of tetralin and hydrogenated intermediates and products on the (100) surfaces of Ir, Pt and Pd: a DFT study. Theor Chem Acc 2010. [DOI: 10.1007/s00214-010-0728-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Nomura K, Matsubara S. A New Zincate-Mediated Rearrangement Reaction of 2-(1-Hydroxyalkyl)-1-alkylcyclopropanol. Chemistry 2010; 16:703-8. [DOI: 10.1002/chem.200901054] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Fujii H, Okada K, Ishihara M, Hanamura S, Osa Y, Nemoto T, Nagase H. Hydrogenolysis of the cyclopropyl group into an isopropyl group in the presence of a platinum catalyst and hydrobromic acid. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.10.064] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Abstract
This paper is the 31st consecutive installment of the annual review of research concerning the endogenous opioid system. It summarizes papers published during 2008 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 and neurophysiology (Section 12); general activity and locomotion (Section 13); gastrointestinal, renal and hepatic functions (Section 14); cardiovascular responses (Section 15); respiration and thermoregulation (Section 16); and 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, United States.
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Nagase H, Osa Y, Nemoto T, Fujii H, Imai M, Nakamura T, Kanemasa T, Kato A, Gouda H, Hirono S. Design and synthesis of novel delta opioid receptor agonists and their pharmacologies. Bioorg Med Chem Lett 2009; 19:2792-5. [DOI: 10.1016/j.bmcl.2009.03.099] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2009] [Revised: 03/14/2009] [Accepted: 03/23/2009] [Indexed: 10/21/2022]
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