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Tkachenko IM, Mankova PA, Rybakov VB, Golovin EV, Klimochkin YN. Wagner-Meerwein type rearrangement in 5-oxohomoadamantane series. Org Biomol Chem 2020; 18:465-478. [PMID: 31845947 DOI: 10.1039/c9ob02060h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Efficient methods for introducing various substituents into the α-position of ethyl 5-oxohomoadamantyl-4-carboxylate are reported. An unexpected acid-catalysed 1,2-alkyl shift in the series of synthesized α,α-bis-substituted 5-oxohomoadamantanes, and also in the hydroxy derivatives of homoadamantane was found. Such a retropinacol-like rearrangement leads to tetra- or pentacyclic mono- or bis-lactones containing a homoadamantane moiety. This new transformation opens access to the synthesis of previously unknown 2,4-di and 2,3,4-trisubstituted derivatives of homoadamantane. The resulting caged γ-butyro- and δ-valerolactones could be considered as potential synthetic or metabolic precursors of conformationally restricted GABA and δ-aminovaleric acid analogues.
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Affiliation(s)
- Ilya M Tkachenko
- Samara State Technical University, 244, Molodogvardeyskaya st., Samara, 443100, Russian Federation.
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Shiryaev VA, Radchenko EV, Palyulin VA, Zefirov NS, Bormotov NI, Serova OA, Shishkina LN, Baimuratov MR, Bormasheva KM, Gruzd YA, Ivleva EA, Leonova MV, Lukashenko AV, Osipov DV, Osyanin VA, Reznikov AN, Shadrikova VA, Sibiryakova AE, Tkachenko IM, Klimochkin YN. Molecular design, synthesis and biological evaluation of cage compound-based inhibitors of hepatitis C virus p7 ion channels. Eur J Med Chem 2018; 158:214-235. [PMID: 30218908 DOI: 10.1016/j.ejmech.2018.08.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 06/04/2018] [Accepted: 08/03/2018] [Indexed: 12/14/2022]
Abstract
The hepatitis C caused by the hepatitis C virus (HCV) is an acute and/or chronic liver disease ranging in severity from a mild brief ailment to a serious lifelong illness that affects up to 3% of the world population and imposes significant and increasing social, economic, and humanistic burden. Over the past decade, its treatment was revolutionized by the development and introduction into clinical practice of the direct acting antiviral (DAA) agents targeting the non-structural viral proteins NS3/4A, NS5A, and NS5B. However, the current treatment options still have important limitations, thus, the development of new classes of DAAs acting on different viral targets and having better pharmacological profile is highly desirable. The hepatitis C virus p7 viroporin is a relatively small hydrophobic oligomeric viral ion channel that plays a critical role during virus assembly and maturation, making it an attractive and validated target for the development of the cage compound-based inhibitors. Using the homology modeling, molecular dynamics, and molecular docking techniques, we have built a representative set of models of the hepatitis C virus p7 ion channels (Gt1a, Gt1b, Gt1b_L20F, Gt2a, and Gt2b), analyzed the inhibitor binding sites, and identified a number of potential broad-spectrum inhibitor structures targeting them. For one promising compound, the binding to these targets was additionally confirmed and the binding modes and probable mechanisms of action were clarified by the molecular dynamics simulations. A number of compounds were synthesized, and the tests of their antiviral activity (using the BVDV model) and cytotoxicity demonstrate their potential therapeutic usefulness and encourage further more detailed studies. The proposed approach is also suitable for the design of broad-spectrum ligands interacting with other multiple labile targets including various viroporins.
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Affiliation(s)
- Vadim A Shiryaev
- Department of Organic Chemistry, Samara State Technical University, Molodogvardeyskaya 244, Samara, 443100, Russia.
| | - Eugene V Radchenko
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow, 119991, Russia
| | - Vladimir A Palyulin
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow, 119991, Russia
| | - Nikolay S Zefirov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow, 119991, Russia
| | - Nikolay I Bormotov
- State Research Center of Virology and Biotechnology 'Vector', Koltsovo, Novosibirsk Region, 630559, Russia
| | - Olga A Serova
- State Research Center of Virology and Biotechnology 'Vector', Koltsovo, Novosibirsk Region, 630559, Russia
| | - Larisa N Shishkina
- State Research Center of Virology and Biotechnology 'Vector', Koltsovo, Novosibirsk Region, 630559, Russia
| | - Marat R Baimuratov
- Department of Organic Chemistry, Samara State Technical University, Molodogvardeyskaya 244, Samara, 443100, Russia
| | - Kseniya M Bormasheva
- Department of Organic Chemistry, Samara State Technical University, Molodogvardeyskaya 244, Samara, 443100, Russia
| | - Yulia A Gruzd
- Department of Organic Chemistry, Samara State Technical University, Molodogvardeyskaya 244, Samara, 443100, Russia
| | - Elena A Ivleva
- Department of Organic Chemistry, Samara State Technical University, Molodogvardeyskaya 244, Samara, 443100, Russia
| | - Marina V Leonova
- Department of Organic Chemistry, Samara State Technical University, Molodogvardeyskaya 244, Samara, 443100, Russia
| | - Anton V Lukashenko
- Department of Organic Chemistry, Samara State Technical University, Molodogvardeyskaya 244, Samara, 443100, Russia
| | - Dmitry V Osipov
- Department of Organic Chemistry, Samara State Technical University, Molodogvardeyskaya 244, Samara, 443100, Russia
| | - Vitaliy A Osyanin
- Department of Organic Chemistry, Samara State Technical University, Molodogvardeyskaya 244, Samara, 443100, Russia
| | - Alexander N Reznikov
- Department of Organic Chemistry, Samara State Technical University, Molodogvardeyskaya 244, Samara, 443100, Russia
| | - Vera A Shadrikova
- Department of Organic Chemistry, Samara State Technical University, Molodogvardeyskaya 244, Samara, 443100, Russia
| | - Anastasia E Sibiryakova
- Department of Organic Chemistry, Samara State Technical University, Molodogvardeyskaya 244, Samara, 443100, Russia
| | - Ilya M Tkachenko
- Department of Organic Chemistry, Samara State Technical University, Molodogvardeyskaya 244, Samara, 443100, Russia
| | - Yuri N Klimochkin
- Department of Organic Chemistry, Samara State Technical University, Molodogvardeyskaya 244, Samara, 443100, Russia
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