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Khudina OG, Burgart YV, Malkova NA, Shchegolkov EV, Krasnykh OP, Triandafilova GA, Malysheva KO, Solodnikov SY, Dubodel ES, Korolkova YV, Kozlov SA, Borisevich SS, Mozhaitsev ES, Saloutin VI. 5-Alkoxy-1-aryl-3-polyfluoroalkylpyrazoles with Antinociceptive Activity: Partial Agonists of TRPV1 Ion Channels. ChemMedChem 2023; 18:e202300063. [PMID: 37006199 DOI: 10.1002/cmdc.202300063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 03/30/2023] [Accepted: 03/31/2023] [Indexed: 04/04/2023]
Abstract
Chemoselective O-alkylation of 1-aryl-3-polyfluoroalkylpyrazol-5-oles under basic conditions resulted in a series of 5-alkoxypyrazoles (26 derivatives). They showed an acceptable ADME profile (in silico) and can be considered as drug-like. In experiments in vivo (CD-1 mice), it was found that the obtained compounds do not have toxic properties at a dose of more than 150 mg/kg (for most compounds at a dose of >300 mg/kg, and for lead compounds - >600 mg/kg). 22 Compounds from this series demonstrated from moderate to high analgesic effects (28-104 % at 1 h and 37-109 % at 2 h after administration) in vivo in the hot plate test (SD rats, 15 mg/kg, intraperitoneal (ip)). The lead compound was 4-([1-phenyl-3-(trifluoromethyl)pyrazol-5-yl]oxy)butan-1-ol, which not only increased the latent period in the hot plate test by 103 % at both measurement points but also showed a pronounced analgesic effect under conditions of capsaicin-induced nociception (CD-1 mice, 15 mg/kg, ip). According to molecular modeling, all synthesized compounds can interact with the TRPV1 ion channel. This biological target was confirmed in in vitro experiments on Chinese hamster ovary cells expressing rTRPV1. 5-Alkoxypyrazoles were partial agonists of the TRPV1 ion channel in various degree, and the most active was the same pyrazole as in in vivo tests.
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Affiliation(s)
- Olga G Khudina
- Ural Branch of the Russian Academy of Sciences, Postovsky Institute of Organic Synthesis, S. Kovalevskoi St., 22, Ekaterinburg, 620108, Russia
| | - Yanina V Burgart
- Ural Branch of the Russian Academy of Sciences, Postovsky Institute of Organic Synthesis, S. Kovalevskoi St., 22, Ekaterinburg, 620108, Russia
| | - Natalia A Malkova
- Ural Branch of the Russian Academy of Sciences, Postovsky Institute of Organic Synthesis, S. Kovalevskoi St., 22, Ekaterinburg, 620108, Russia
| | - Evgeny V Shchegolkov
- Ural Branch of the Russian Academy of Sciences, Postovsky Institute of Organic Synthesis, S. Kovalevskoi St., 22, Ekaterinburg, 620108, Russia
| | - Olga P Krasnykh
- Scientific and Educational Center for Applied Chemical-Biological Research, Perm National Research Polytechnic University, Komsomolsky Av., 29, Perm, 614990, Russia
| | - Galina A Triandafilova
- Scientific and Educational Center for Applied Chemical-Biological Research, Perm National Research Polytechnic University, Komsomolsky Av., 29, Perm, 614990, Russia
| | - Ksenia O Malysheva
- Scientific and Educational Center for Applied Chemical-Biological Research, Perm National Research Polytechnic University, Komsomolsky Av., 29, Perm, 614990, Russia
| | - Sergey Yu Solodnikov
- Scientific and Educational Center for Applied Chemical-Biological Research, Perm National Research Polytechnic University, Komsomolsky Av., 29, Perm, 614990, Russia
| | - Elisaveta S Dubodel
- The Russian Academy of Sciences, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya St., 16/10, Moscow, 117997, Russia
| | - Yuliya V Korolkova
- The Russian Academy of Sciences, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya St., 16/10, Moscow, 117997, Russia
| | - Sergey A Kozlov
- The Russian Academy of Sciences, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya St., 16/10, Moscow, 117997, Russia
| | - Sophia S Borisevich
- The Russian Academy of Sciences, Ufa Institute of Chemistry, Octyabrya Av., 71, Ufa, 450078, Russia
| | - Evgenii S Mozhaitsev
- Siberian Branch of the Russian Academy of Sciences, N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Lavrentiev Av., 9, Novosibirsk, 630090, Russia
| | - Victor I Saloutin
- Ural Branch of the Russian Academy of Sciences, Postovsky Institute of Organic Synthesis, S. Kovalevskoi St., 22, Ekaterinburg, 620108, Russia
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Lapshin LS, Shchegolkov EV, Burgart YV, Triandafilova GA, Krasnykh OP, Malysheva KO, Saloutin VI. Synthesis of new analgesics based on 4-isopropyl-1-phenyl-3-(trifluoromethyl)pyrazol-5-one. MENDELEEV COMMUNICATIONS 2023. [DOI: 10.1016/j.mencom.2023.02.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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Synthesis of 4-Aminopyrazol-5-ols as Edaravone Analogs and Their Antioxidant Activity. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27227722. [PMID: 36431823 PMCID: PMC9699072 DOI: 10.3390/molecules27227722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/02/2022] [Accepted: 11/04/2022] [Indexed: 11/12/2022]
Abstract
One of the powerful antioxidants used clinically is Edaravone (EDA). We synthesized a series of new EDA analogs, 4-aminopyrazol-5-ol hydrochlorides, including polyfluoroalkyl derivatives, via the reduction of 4-hydroxyiminopyrazol-5-ones. The primary antioxidant activity of the compounds in comparison with EDA was investigated in vitro using ABTS, FRAP, and ORAC tests. In all tests, 4-Amino-3-pyrazol-5-ols were effective. The lead compound, 4-amino-3-methyl-1-phenylpyrazol-5-ol hydrochloride (APH), showed the following activities: ABTS, 0.93 TEAC; FRAP, 0.98 TE; and ORAC, 4.39 TE. APH and its NH-analog were not cytotoxic against cultured normal human fibroblasts even at 100 μM, in contrast to EDA. According to QM calculations, 4-aminopyrazolols were characterized by lower gaps, IP, and η compared to 4-hydroxyiminopyrazol-5-ones, consistent with their higher antioxidant activities in ABTS and FRAP tests, realized by the SET mechanism. The radical-scavenging action evaluated in the ORAC test occurred by the HAT mechanism through OH bond breaking in all compounds, directly dependent on the dissociation energy of the OH bond. All the studied compounds demonstrated the absence of anticholinesterase activity and moderate inhibition of CES by some 4-aminopyrazolols. Thus, the lead compound APH was found to be a good antioxidant with the potential to be developed as a novel therapeutic drug candidate in the treatment of diseases associated with oxidative stress.
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Elkina NA, Burgart YV, Shchegolkov EV, Krasnykh OP, Maslova VV, Triandafilova GA, Solodnikov SS, Muryleva AA, Misiurina MA, Slita AV, Zarubaev VV, Saloutin VI. Competitive routes to cyclizations of polyfluoroalkyl-containing 2-tolylhydrazinylidene-1,3-diketones with 3-aminopyrazoles into bioactive pyrazoloazines. J Fluor Chem 2020. [DOI: 10.1016/j.jfluchem.2020.109648] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Khudina OG, Burgart YV, Saloutin VI. Functionalization of 1,2-diphenylpyrazolidine-3,5-dione with polyfluoroalkyl-containing 2- and 3-oxo esters. MENDELEEV COMMUNICATIONS 2020. [DOI: 10.1016/j.mencom.2020.09.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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