1
|
Zelentsova MV, Sandulenko IV, Ambartsumyan AA, Danshina AA, Moiseev SK. C(21)-Di- and monofluorinated scaffold for thevinol/orvinol-based opioid receptor ligands. Org Biomol Chem 2023; 21:9091-9100. [PMID: 37947030 DOI: 10.1039/d3ob01577g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
Defluorination of the readily available 21,21,21-trifluorothevinone (7) with Mg + Me3SiCl allows the preparation of 21,21-difluorothevinone (10) and 21-fluorothevinone (11), which can be used as the starting compounds for syntheses of 21,21-difluoro- and 21-fluoro-substituted relatives of thevinols and orvinols. Taken together, thevinols and orvinols are well known to constitute a family of the highly potent 4,5α-epoxy-18,19-endo-(etheno/ethano)morphinan-type opioid receptor ligands. Alternatively, 10 and 18,19-dihydro-21,21-difluorothevinone (13) have been synthesized by the addition of Me3SiCHF2 to the carbonyl function of thevinal (12) and dihydrothevinal (18) followed by oxidation of the intermediate C(21)-difluorinated secondary alcohols. 21,21-Difluorothevinols were obtained both by the addition of RMgX or RLi to the 21,21-difluoroketones and by the addition of Me3SiCHF2 to the carbonyl function of the non-fluorinated 18,19-endo-(etheno/ethano)morphinan ketones. In general, these addition reactions have been shown to result in mixtures of the C(21)-epimeric alcohols. However, in some cases, the reactions proceeded with high stereoselectivity allowing the isolation of one of the epimeric alcohols by conventional crystallization. Preparations of the 21,21-difluorothevinols bearing an allyl, cyclopropylmethyl, or cyclobutylmethyl group at the N(17) nitrogen are also reported.
Collapse
Affiliation(s)
- Maria V Zelentsova
- A.N.Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova, 28, bld. 1, Moscow, 119334, Russia.
| | - Irina V Sandulenko
- A.N.Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova, 28, bld. 1, Moscow, 119334, Russia.
| | - Asmik A Ambartsumyan
- A.N.Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova, 28, bld. 1, Moscow, 119334, Russia.
| | - Anastasia A Danshina
- A.N.Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova, 28, bld. 1, Moscow, 119334, Russia.
- Moscow Institute of Physics and Technology (National Research University), Institutskiy per., 9, Dolgoprudny, Moscow Region, 141700, Russia
| | - Sergey K Moiseev
- A.N.Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova, 28, bld. 1, Moscow, 119334, Russia.
| |
Collapse
|
2
|
Sandulenko IV, Belozertseva IV, Zvartau EE, Zelentsova MV, Ambartsumyan AA, Smol'yakov AF, Moiseev SK. C(21)-fluorinated thevinol scaffold for opioid ligands. 21,21,21-Trifluoro-6-O-nororvinols: Design, synthesis and analgesic activity. Eur J Med Chem 2023; 252:115296. [PMID: 36966650 DOI: 10.1016/j.ejmech.2023.115296] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 03/10/2023] [Accepted: 03/16/2023] [Indexed: 04/03/2023]
Abstract
Thevinols and their 3-O-demethylated relatives, orvinols, are derivatives of the Diels-Alder adduct of natural alkaloid thebaine with methyl vinyl ketone. Taken together, thevinols and orvinols constitute an important family of opioid receptor (OR) ligands playing an important role in both the OR mediated antinociception and OR antagonism. Herein, we disclose for the first time the OR activity of orvinols fluorinated within the pharmocophore associated with C(20) and its surrounding along with a dependence of the activity profile on the substituent at N(17). Starting from thevinone and 18,19-dihydrothevinone, a family of C(21)-fluorinated orvinols bearing methyl, cyclopropylmethyl (CPM), and allyl substituent at N(17) was synthesized. The fluorinated compounds were evaluated for OR activity. The orvinols bearing three fluorine atoms at C(21) were found to retain the properties of OR ligands and their activity profile depends on the substituent at N(17). Pilot in vivo experiments in a model of acute pain (tail-flick test in mice) revealed that 6-O-desmethyl-21,21,21-trifluoro-20-methylorvinol at doses 1.0-10.0 mg/kg (s.c.) exhibits analgesic activity at the level of morphine for a duration of 30-180 min. Its N(17)-CPM counterpart demonstrated the partial opioid agonist properties. The N(17)-allyl substituted derivative showed no analgesic activity. In vivo evaluation of an analgesic activity indicates that 21,21,21-trifluoro-20-methylorvinols represent a novel family of OR ligands related to buprenorphine, diprenorphine, etc. These compounds are promising for the structure-activity relationship studies among the thevinol/orvinol series as well as for a search for new OR ligands with potentially valuable pharmacological profiles.
Collapse
Affiliation(s)
- Irina V Sandulenko
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova 28, bld. 1, Moscow, 119334, Russia
| | - Irina V Belozertseva
- Pavlov First Saint Petersburg State Medical University, L'va Tolstogo str. 6-8, St. Petersburg, 197022, Russia
| | - Edwin E Zvartau
- Pavlov First Saint Petersburg State Medical University, L'va Tolstogo str. 6-8, St. Petersburg, 197022, Russia
| | - Maria V Zelentsova
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova 28, bld. 1, Moscow, 119334, Russia
| | - Asmik A Ambartsumyan
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova 28, bld. 1, Moscow, 119334, Russia
| | - Alexander F Smol'yakov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova 28, bld. 1, Moscow, 119334, Russia; Plekhanov Russian University of Economics, Stremyanny per. 36, Moscow, 117997, Russia
| | - Sergey K Moiseev
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova 28, bld. 1, Moscow, 119334, Russia.
| |
Collapse
|
3
|
Sandulenko IV, Kovaleva ES, Zelentsova MV, Ambartsumyan AA, Gorlov SN, Danshina AA, Aysin RR, Moiseev SK. Control of the diastereoselectivity at C(20) in the formation of C(21)-fluorinated thevinols. Org Biomol Chem 2023; 21:1440-1449. [PMID: 36651056 DOI: 10.1039/d2ob02144g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A method is reported to control the stereoselectivity at C(20) in the syntheses of 20-R-21,21,21-trifluorothevinols (12), the opioid ligands incorporating fluorine atoms within the pharmacophore associated with the surroundings of the C(20) carbon atom. The C(20)-alcohols 12 can be prepared either by reaction of 21,21,21-trifluorothevinone (9) with RM (R = alkyl; M = Li, MgX) or by reaction of thevinone (2) and related non-fluorinated ketones with CF3SiMe3. In general, alcohols 12 were formed as mixtures of the C(20)-epimers, with the major epimers of the alcohols obtained from the aforementioned reactions exploiting RLi vs. CF3SiMe3 with opposite absolute configurations at C(20). Some individual C(20)-epimers of the fluorinated alcohols 12 were isolated from the reaction mixtures in pure form by trivial crystallization. The reactions of the ketones with RMgX (R ≠ Me) and RLi (R = tertiary or secondary alkyl) resulted in the reduction of the carbonyl function to produce the secondary alcohols 11a,b rather than the tertiary alcohols 12. The additives of the salts were found to affect the composition of the products in the reactions of 9 with alkyl organomagnesium and organolithium reagents.
Collapse
Affiliation(s)
- Irina V Sandulenko
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, build. 1, ul. Vavilova 28, Moscow 119334, Russia.
| | - Ekaterina S Kovaleva
- D. I. Mendeleev University of Chemical Technology of Russia, Miusskaya Sq., 9, Moscow 125047, Russia
| | - Maria V Zelentsova
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, build. 1, ul. Vavilova 28, Moscow 119334, Russia.
| | - Asmik A Ambartsumyan
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, build. 1, ul. Vavilova 28, Moscow 119334, Russia.
| | - Sergey N Gorlov
- Faculty of the Fundamental Physical and Chemical Engineering, Lomonosov Moscow State University, Leninskiye Gory 1-51, Moscow 119991, Russia
| | - Anastasia A Danshina
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, build. 1, ul. Vavilova 28, Moscow 119334, Russia. .,Moscow Institute of Physics and Technology (National Research University), Institutskiy per., 9, Dolgoprudny, 3, Russia
| | - Rinat R Aysin
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, build. 1, ul. Vavilova 28, Moscow 119334, Russia. .,Moscow Institute of Physics and Technology (National Research University), Institutskiy per., 9, Dolgoprudny, 3, Russia
| | - Sergey K Moiseev
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, build. 1, ul. Vavilova 28, Moscow 119334, Russia.
| |
Collapse
|
4
|
Diels–Alder Adducts of Morphinan-6,8-Dienes and Their Transformations. Molecules 2022; 27:molecules27092863. [PMID: 35566212 PMCID: PMC9102320 DOI: 10.3390/molecules27092863] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 04/19/2022] [Accepted: 04/20/2022] [Indexed: 02/04/2023] Open
Abstract
6,14-ethenomorphinans are semisynthetic opiate derivatives containing an ethylene bridge between positions 6 and 14 in ring-C of the morphine skeleton that imparts a rigid molecular structure. These compounds represent an important family of opioid receptor ligands in which the 6,14-etheno bridged structural motif originates from a [4 + 2] cycloaddition of morphinan-6,8-dienes with dienophiles. Certain 6,14-ethenomorphinans having extremely high affinity for opioid receptors are often non-selective for opioid receptor subtypes, but this view is now undergoing some revision. The agonist 20R-etorphine and 20R-dihydroetorphine are several thousand times more potent analgesics than morphine, whereas diprenorphine is a high-affinity non-selective antagonist. The partial agonist buprenorphine is used as an analgesic in the management of post-operative pain or in substitution therapy for opiate addiction, sometimes in combination with the non-selective antagonist naloxone. In the context of the current opioid crisis, we communicated a summary of several decades of work toward generating opioid analgesics with lesser side effects or abuse potential. Our summary placed a focus on Diels–Alder reactions of morphinan-6,8-dienes and subsequent transformations of the cycloadducts. We also summarized the pharmacological aspects of radiolabeled 6,14-ethenomorphinans used in molecular imaging of opioid receptors.
Collapse
|