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Arita H, Tanaka R, Kikukawa S, Tomizawa T, Sakata H, Funada M, Tomiyama K, Hashimoto M, Tasaka T, Tabata H, Nakamura K, Makino K, Oshitari T, Natsugari H, Takahashi H. Fentanyl-Type Antagonist of the μ-Opioid Receptor: Important Role of Axial Chirality in the Active Conformation. J Med Chem 2024; 67:10447-10463. [PMID: 38869493 PMCID: PMC11215721 DOI: 10.1021/acs.jmedchem.4c00935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Revised: 05/24/2024] [Accepted: 05/30/2024] [Indexed: 06/14/2024]
Abstract
In recent years, synthetic opioids have emerged as a predominant cause of drug-overdose-related fatalities, causing the "opioid crisis." To design safer therapeutic agents, we accidentally discovered μ-opioid receptor (MOR) antagonists based on fentanyl with a relatively uncomplicated chemical composition that potentiates structural modifications. Here, we showed the development of novel atropisomeric fentanyl analogues that exhibit more potent antagonistic activity against MOR than naloxone, a morphinan MOR antagonist. Derivatives displaying stable axial chirality were synthesized based on the amide structure of fentanyl. The aS- and aR-enantiomers exerted antagonistic and agonistic effects on the MOR, respectively, and each atropisomer interacted with the MOR by assuming a distinct binding mode through molecular docking. These findings suggest that introducing atropisomerism into fentanyl may serve as a key feature in the molecular design of future MOR antagonists to help mitigate the opioid crisis.
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Affiliation(s)
- Hironobu Arita
- Faculty
of Pharmaceutical Sciences, Tokyo University
of Science, Noda-shi, Chiba 278-8510, Japan
| | - Ryoko Tanaka
- Faculty
of Pharmaceutical Sciences, Tokyo University
of Science, Noda-shi, Chiba 278-8510, Japan
| | - Shuntaro Kikukawa
- Faculty
of Pharmaceutical Sciences, Tokyo University
of Science, Noda-shi, Chiba 278-8510, Japan
| | - Tsukasa Tomizawa
- Faculty
of Pharmaceutical Sciences, Tokyo University
of Science, Noda-shi, Chiba 278-8510, Japan
| | - Haruka Sakata
- Faculty
of Pharmaceutical Sciences, Tokyo University
of Science, Noda-shi, Chiba 278-8510, Japan
| | - Masahiko Funada
- Faculty
of Pharmaceutical Sciences, Shonan University
of Medical Sciences, Yokohama-shi, Kanagawa 224-0806, Japan
| | - Kenichi Tomiyama
- Section
of Addictive Drug Research, Department of Drug Dependence Research,
National Institute of Mental Health, National
Center of Neurology and Psychiatry, Kodaira-shi, Tokyo 187-8533, Japan
| | - Masaru Hashimoto
- Faculty
of Agriculture and Life Science, Hirosaki
University, Hirosaki-shi, Aomori 036-8561, Japan
| | - Tomohiko Tasaka
- Affinity
Science Corporation, Shinagawa-ku, Tokyo 141-0031, Japan
| | - Hidetsugu Tabata
- Faculty of
Pharma Sciences, Teikyo University, Itabashi-ku, Tokyo 173-8605, Japan
| | - Kayo Nakamura
- Faculty
of Pharmaceutical Sciences, Tokyo University
of Science, Noda-shi, Chiba 278-8510, Japan
| | - Kosho Makino
- Research
Institute of Pharmaceutical Sciences, Musashino
University, Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Tetsuta Oshitari
- Faculty of
Pharma Sciences, Teikyo University, Itabashi-ku, Tokyo 173-8605, Japan
| | - Hideaki Natsugari
- Graduate
School of Pharmaceutical Science, The University
of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Hideyo Takahashi
- Faculty
of Pharmaceutical Sciences, Tokyo University
of Science, Noda-shi, Chiba 278-8510, Japan
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Takayama J, Sakamoto T, Hayashi K, Xuan M, Suda M, Teramae H, Shimano Y. Oxidative Dearomatic Cyclization of N-Substituted Benzanilide Derivatives: Conformational Effect of Amide Groups on the Reaction. HETEROCYCLES 2016. [DOI: 10.3987/com-16-13515] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Characteristic conformation of Mosher's amide elucidated using the cambridge structural database. Molecules 2015; 20:12880-900. [PMID: 26193245 PMCID: PMC6332137 DOI: 10.3390/molecules200712880] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 07/09/2015] [Accepted: 07/10/2015] [Indexed: 11/16/2022] Open
Abstract
Conformations of the crystalline 3,3,3-trifluoro-2-methoxy-2-phenylpropanamide derivatives (MTPA amides) deposited in the Cambridge Structural Database (CSD) were examined statistically as Racid-enantiomers. The majority of dihedral angles (48/58, ca. 83%) of the amide carbonyl groups and the trifluoromethyl groups ranged from –30° to 0° with an average angle θ1 of −13°. The other conformational properties were also clarified: (1) one of the fluorine atoms was antiperiplanar (ap) to the amide carbonyl group, forming a staggered conformation; (2) the MTPA amides prepared from primary amines showed a Z form in amide moieties; (3) in the case of the MTPA amide prepared from a primary amine possessing secondary alkyl groups (i.e., Mosher-type MTPA amide), the dihedral angles between the methine groups and the carbonyl groups were syn and indicative of a moderate conformational flexibility; (4) the phenyl plane was inclined from the O–Cchiral bond of the methoxy moiety with an average dihedral angle θ2 of +21°; (5) the methyl group of the methoxy moiety was ap to the ipso-carbon atom of the phenyl group.
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Okamoto I, Nabeta M, Yamamoto M, Mikami M, Takeya T, Tamura O. Solvent-dependent conformational switching of the aromatic N-methyl amides depending upon the acceptor properties of solvents. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.08.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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