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Filatov AS, Khoroshilova OV, Larina AG, Boitsov VM, Stepakov AV. Synthesis of bis-spirocyclic derivatives of 3-azabicyclo[3.1.0]hexane via cyclopropene cycloadditions to the stable azomethine ylide derived from Ruhemann's purple. Beilstein J Org Chem 2022; 18:769-780. [PMID: 35859623 PMCID: PMC9263550 DOI: 10.3762/bjoc.18.77] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Accepted: 06/17/2022] [Indexed: 11/23/2022] Open
Abstract
A reliable method for the synthesis of bis-spirocyclic derivatives of 3-azabicyclo[3.1.0]hexanes through the 1,3-dipolar cycloaddition (1,3-DC) reactions of cyclopropenes to the stable azomethine ylide – protonated form of Ruhemann's purple (PRP) has been developed. Both 3-substituted and 3,3-disubstituted cyclopropenes reacted with PRP, affording the corresponding bis-spirocyclic 3-azabicyclo[3.1.0]hexane cycloadducts in moderate to good yields with high diastereofacial selectivity. Moreover, several unstable 1,2-disubstituted cyclopropenes were successfully trapped by the stable 1,3-dipole under mild conditions. The mechanism of the cycloaddition reactions of cyclopropenes with PRP has been thoroughly studied using density functional theory (DFT) methods at the M11/cc-pVDZ level of theory. The cycloaddition reactions have been found to be HOMOcyclopropene–LUMOylide controlled while the transition-state energies for the reaction of 3-methyl-3-phenylcyclopropene with PRP are fully consistent with the experimentally observed stereoselectivity.
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Affiliation(s)
- Alexander S Filatov
- Saint-Petersburg State University, Universitetskaya nab. 7/9, 199034, St. Petersburg, Russian Federation
| | - Olesya V Khoroshilova
- Saint-Petersburg State University, Universitetskaya nab. 7/9, 199034, St. Petersburg, Russian Federation
| | - Anna G Larina
- Saint-Petersburg State University, Universitetskaya nab. 7/9, 199034, St. Petersburg, Russian Federation
| | - Vitali M Boitsov
- Saint-Petersburg National Research Academic University of the Russian Academy of Sciences, ul. Khlopina 8/3, 194021, St. Petersburg, Russian Federation
| | - Alexander V Stepakov
- Saint-Petersburg State University, Universitetskaya nab. 7/9, 199034, St. Petersburg, Russian Federation
- Saint-Petersburg State Institute of Technology, Moskovskii pr. 26, 190013, St. Petersburg, Russian Federation
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Boitsov VM, Stepakov AV, Filatov AS, Selivanov SI, Shmakov SV, Larina AG. An Experimental and Theoretical Study of the 1,3-Dipolar Cycloaddition of Alloxan-Derived Azomethine Ylides to Cyclopropenes. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1700-3115] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
AbstractA diastereoselective synthesis of biologically interesting spirobarbiturates has been achieved via [3+2] cycloaddition of alloxan-derived azomethine ylides to 3-R-1,2-diphenylcyclopropenes. With this approach, a range of spirobarbiturate-3-azabicyclo[3.1.0]hexanes and spirobarbiturate-cyclopropa[a]pyrrolizines were obtained in moderate to good yields with excellent diastereoselectivities. DFT calculations (M11 density functional theory) were carried out to shed light on the molecular mechanism of 1,3-dipolar cycloaddition of alloxan-derived azomethine ylides to cyclopropenes. The cytotoxic activity of some obtained compounds against human erythroleukemia (K562) cell line was evaluated in vitro by MTS-assay.
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Affiliation(s)
- Vitali M. Boitsov
- Saint Petersburg National Research Academic University of the Russian Academy of Sciences
| | | | | | | | - Stanislav V. Shmakov
- Saint Petersburg National Research Academic University of the Russian Academy of Sciences
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Stepakov AV, Filatov AS, Boitsov VM, Lozovskiy SV. Diastereoselective cycloaddition of tosylpropadiene to azomethine ylides, derived from proline and carbonyl compounds: an experimental and DFT study. PHOSPHORUS SULFUR 2022. [DOI: 10.1080/10426507.2021.2017436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Alexander V. Stepakov
- Institute of Chemistry, Saint Petersburg State University, Petersburg, Russian Federation
- Saint Petersburg State Institute of Technology, Petersburg, Russian Federation
| | - Alexander S. Filatov
- Institute of Chemistry, Saint Petersburg State University, Petersburg, Russian Federation
| | - Vitali M. Boitsov
- Saint Petersburg National Research Academic University of the Russian Academy of Sciences, Petersburg, Russian Federation
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Stepakov AV, Filatov AS, Larina AG, Petrov ML, Boitsov VM. Synthesis of Quinolino[1,2-c]quinazolin-6-one Derivatives via Formal (4+2)-Cycloaddition of Alkenes to Quinazolinе-Derived N-Acyliminium Cations: An Experimental and Theoretical Study. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1755-2061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Abstract3-Aryl-4-hydroxy-1-methyl-3,4-dihydroquinazolin-2(1H)-ones were synthesized by reduction of 3-aryl-1-methylquinazoline-2,4(1H,3H)-diones with sodium triethylborohydride and studied as precursors of N-acyliminium cations that were expected to be trapped with various alkenes as (4+2)-cycloadducts. Unsubstituted 3-aryl-4-hydroxy-1-methyl-3,4-dihydroquinazolin-2(1H)-ones in the presence of BF3·Et2O failed to produce the desired cycloadducts probably due to a homooligomerization reaction involving N-acyliminium intermediates. To prevent this side reaction, we found it necessary to introduce substituents at both positions C6 and C8 of the quinazoline ring and C4′ of the 3-phenyl substituent. Utilizing bromine atoms as substituents at C6 and C8, N-acyliminium cations generated from 3-aryl-6,8-dibromo-4-hydroxy-1-methyl-3,4-dihydroquinazolin-2(1H)-ones in the presence of BF3·Et2O smoothly reacted with such alkenes as indene, acenaphthylene, styrene, α-methylstyrene to give new quinolino[1,2-c]quinazolin-6-one derivatives with high regio- and stereoselectivity. Density functional theory calculations were performed at the M06-2x/cc-pVDZ level to obtain an insight into the mechanism of the (4+2)-cycloaddition reaction of quinazoline-derived N-acyliminium cations to alkenes.
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Affiliation(s)
| | | | | | | | - Vitali M. Boitsov
- Saint Petersburg National Research Academic University of the Russian Academy of Sciences
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Latypova DK, Shmakov SV, Pechkovskaya SA, Filatov AS, Stepakov AV, Knyazev NA, Boitsov VM. Identification of Spiro-Fused Pyrrolo[3,4- a]pyrrolizines and Tryptanthrines as Potential Antitumor Agents: Synthesis and In Vitro Evaluation. Int J Mol Sci 2021; 22:ijms222111997. [PMID: 34769424 PMCID: PMC8584944 DOI: 10.3390/ijms222111997] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 10/31/2021] [Accepted: 11/02/2021] [Indexed: 01/01/2023] Open
Abstract
A series of heterocyclic compounds containing a spiro-fused pyrrolo[3,4-a]pyrrolizine and tryptanthrin framework have been synthesized and studied as potential antitumor agents. Cytotoxicity of products was screened against human erythroleukemia (K562) and human cervical carcinoma (HeLa) cell lines. Among the screened compounds. 4a, 4b and 5a were active against human erythroleukemia (K562) cell line, while 4a and 5a were active against cervical carcinoma (HeLa) cell line. In agreement with the DNA cytometry studies, the tested compounds have achieved significant cell-cycle perturbation with higher accumulation of cells in G2/M phase and induced apoptosis. Using confocal microscopy, we found that with 4a and 5a treatment of HeLa cells, actin filaments disappeared, and granular actin was distributed diffusely in the cytoplasm in 76–91% of cells. We discovered that HeLa cells after treatment with compounds 4a and 5a significantly reduced the number of cells with filopodium-like membrane protrusions (from 63 % in control cells to 29% after treatment) and a decrease in cell motility.
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Affiliation(s)
- Diana K. Latypova
- Saint-Petersburg National Research Academic University of the Russian Academy of Sciences, 194021 Saint-Petersburg, Russia; (D.K.L.); (S.V.S.)
| | - Stanislav V. Shmakov
- Saint-Petersburg National Research Academic University of the Russian Academy of Sciences, 194021 Saint-Petersburg, Russia; (D.K.L.); (S.V.S.)
| | - Sofya A. Pechkovskaya
- Institute of Cytology, Russian Academy of Sciences, 194064 Saint-Petersburg, Russia;
| | - Alexander S. Filatov
- Department of Chemistry, Saint-Petersburg State University, 199034 Saint Petersburg, Russia; (A.S.F.); (A.V.S.)
| | - Alexander V. Stepakov
- Department of Chemistry, Saint-Petersburg State University, 199034 Saint Petersburg, Russia; (A.S.F.); (A.V.S.)
- Department of Organic Chemistry, Saint Petersburg State Institute of Technology, 190013 Saint-Petersburg, Russia
| | - Nickolay A. Knyazev
- Institute of Cytology, Russian Academy of Sciences, 194064 Saint-Petersburg, Russia;
- Saint-Petersburg Clinical Scientific and Practical Center for Specialized Types of Medical Care (Oncological), 197758 Saint-Petersburg, Russia
- Correspondence: (N.A.K.); (V.M.B.)
| | - Vitali M. Boitsov
- Saint-Petersburg National Research Academic University of the Russian Academy of Sciences, 194021 Saint-Petersburg, Russia; (D.K.L.); (S.V.S.)
- Correspondence: (N.A.K.); (V.M.B.)
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Knyazev NA, Shmakov SV, Pechkovskaya SA, Filatov AS, Stepakov AV, Boitsov VM, Filatova NA. Identification of Spiro-Fused [3-azabicyclo[3.1.0]hexane]oxindoles as Potential Antitumor Agents: Initial In Vitro Evaluation of Anti-Proliferative Effect and Actin Cytoskeleton Transformation in 3T3 and 3T3-SV40 Fibroblast. Int J Mol Sci 2021; 22:8264. [PMID: 34361029 PMCID: PMC8347490 DOI: 10.3390/ijms22158264] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Revised: 07/26/2021] [Accepted: 07/28/2021] [Indexed: 11/17/2022] Open
Abstract
Novel heterocyclic compounds containing 3-spiro[3-azabicyclo[3.1.0]hexane]oxindole framework (4a, 4b and 4c) have been studied as potential antitumor agents. The in silico ADMET (adsorption, distribution, metabolism, excretion and toxicity) analysis was performed on 4a-c compounds with promising antiproliferative activity, previously synthetized and screened against human erythroleukemic cell line K562 tumor cell line. Cytotoxicity of 4a-c against murine fibroblast 3T3 and SV-40 transformed murine fibroblast 3T3-SV40 cell lines were evaluated. The 4a and 4c compounds were cytotoxic against 3T3-SV40 cells in comparison with those of 3T3. In agreement with the DNA cytometry studies, the tested compounds have achieved significant cell-cycle perturbation with higher accumulation of cells in G0/G1 phase. Using confocal microscopy, we found that with 4a and 4c treatment of 3T3 cells, actin filaments disappeared, and granular actin was distributed diffusely in the cytoplasm in 82-97% of cells. The number of 3T3-SV40 cells with stress fibers increased to 7-30% against 2% in control. We discovered that transformed 3T3-SV40 cells after treatment with compounds 4a and 4c significantly reduced the number of cells with filopodium-like membrane protrusions (from 86 % in control cells to 6-18% after treatment), which indirectly suggests a decrease in cell motility. We can conclude that the studied compounds 4a and 4c have a cytostatic effect, which can lead to a decrease in the number of filopodium-like membrane protrusions.
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Affiliation(s)
- Nickolay A. Knyazev
- Saint-Petersburg Clinical Scientific and Practical Center for Specialized Types of Medical Care (Oncological), 197758 Saint Petersburg, Russia
- Institute of Cytology, Russian Academy of Sciences, 194064 Saint Petersburg, Russia; (S.A.P.); (N.A.F.)
| | - Stanislav V. Shmakov
- Saint Petersburg National Research Academic University of the Russian Academy of Sciences, 194021 Saint Petersburg, Russia;
| | - Sofya A. Pechkovskaya
- Institute of Cytology, Russian Academy of Sciences, 194064 Saint Petersburg, Russia; (S.A.P.); (N.A.F.)
| | - Alexander S. Filatov
- Department of Chemistry, Saint Petersburg State University, 199034 Saint Petersburg, Russia; (A.S.F.); (A.V.S.)
| | - Alexander V. Stepakov
- Department of Chemistry, Saint Petersburg State University, 199034 Saint Petersburg, Russia; (A.S.F.); (A.V.S.)
| | - Vitali M. Boitsov
- Saint Petersburg National Research Academic University of the Russian Academy of Sciences, 194021 Saint Petersburg, Russia;
- Scientific and Research Centre, Pavlov First Saint Petersburg State Medical University, 197022 Saint Petersburg, Russia
| | - Natalia A. Filatova
- Institute of Cytology, Russian Academy of Sciences, 194064 Saint Petersburg, Russia; (S.A.P.); (N.A.F.)
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Boitsov VM, Stepakov AV, Wang S, Filatov AS, Lozovskiy SV, Shmakov SV, Khoroshilova OV, Larina AG, Selivanov SI. Construction of Spiro[3-azabicyclo[3.1.0]hexanes] via 1,3-Dipolar Cycloaddition of 1,2-Diphenylcyclopropenes to Ninhydrin-Derived Azomethine Ylides. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1360-9716] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
AbstractThe multi-component 1,3-dipolar cycloaddition of ninhydrin, α-amino acids (or peptides), and cyclopropenes for the synthesis of spirocyclic heterocycles containing both 3-azabicyclo[3.1.0]hexane and 2H-indene-1,3-dione motifs has been developed. This method provides easy access to 3-azabicyclo[3.1.0]hexane-2,2′-indenes with complete stereoselectivity and a high degree of atom economy under mild reaction conditions. A broad range of cyclopropenes and α-amino acids have been found to be compatible with the present protocol, which offers an opportunity to create a new library of biologically significant scaffold (3-azabicyclo[3.1.0]hexane). In addition, the сomprehensive study of mechanism of azomethine ylide formation from ninhydrin and sarcosine was performed by means of M11 density functional theory (DFT) calculations. It has been revealed that experimentally observed 1-methylspiro[aziridine-2,2′-indene]-1′,3′-dione is a kinetically controlled product of this reaction and appears to act as a 1,3-dipole precursor. This theoretical study also shed light on the main transformations of the azomethine ylide derived from ninhydrin and sarcosine such as a 1,3-dipolar cycloaddition to cyclopropene dipolarophiles, a dimerization reaction and a (1+5) electrocyclization reaction. The antitumor activity of some synthesized compounds against cervical carcinoma (HeLa) cell line was evaluated in vitro by MTS-assay.
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Affiliation(s)
- Vitali M. Boitsov
- Saint Petersburg Academic University Nanotechnology Research and Education Centre RAS
- Pavlov First Saint Petersburg State Medical University
| | | | | | | | | | - Stanislav V. Shmakov
- Saint Petersburg Academic University Nanotechnology Research and Education Centre RAS
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Filatov AS, Wang S, Khoroshilova OV, Lozovskiy SV, Larina AG, Boitsov VM, Stepakov AV. Stereo- and Regioselective 1,3-Dipolar Cycloaddition of the Stable Ninhydrin-Derived Azomethine Ylide to Cyclopropenes: Trapping of Unstable Cyclopropene Dipolarophiles. J Org Chem 2019; 84:7017-7036. [PMID: 31066276 DOI: 10.1021/acs.joc.9b00753] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A stereo- and regioselective 1,3-dipolar cycloaddition of the stable ninhydrin-derived azomethine ylide [2-(3,4-dihydro-2 H-pyrrolium-1-yl)-1-oxo-1 H-inden-3-olate, DHPO] to differently substituted cyclopropenes has been established. As a result, an efficient synthetic protocol was developed for the preparation of biologically relevant spiro[cyclopropa[ a]pyrrolizine-2,2'-indene] derivatives. DHPO has proved to be an effective trap for such highly reactive and unstable substrates as parent cyclopropene, 1-methylcyclopropene, 1-phenylcyclopropene, and 1-halo-2-phenylcyclopropenes. It has also been found that 3-nitro-1,2-diphenylcyclopropene undergoes a nucleophilic substitution reaction in alcohols and thiols to afford 3-alkoxy- and 3-arylthio-substituted 1,2-diphenylcyclopropenes, which can be captured as corresponding 1,3-dipolar cycloadducts in the presence of DHPO. These new approaches provide a straightforward strategy for the synthesis of functionally substituted cyclopropa[ a]pyrrolizine derivatives. The factors governing regio- and stereoselectivity have been revealed by means of quantum mechanical calculations (M11 density functional theory), including previously unreported Nylide- Hcyclopropene second-orbital interactions. The outcome of this work contributes to the study of 1,3-dipolar cycloaddition, as well as enriches chemistry of cyclopropenes and methods for the construction of polycyclic compounds with cyclopropane fragments.
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Affiliation(s)
- Alexander S Filatov
- Institute of Chemistry , Saint Petersburg State University , Universitetsky pr. 26 , 198504 St. Petersburg , Russian Federation
| | - Siqi Wang
- Institute of Chemistry , Saint Petersburg State University , Universitetsky pr. 26 , 198504 St. Petersburg , Russian Federation
| | - Olesya V Khoroshilova
- Institute of Chemistry , Saint Petersburg State University , Universitetsky pr. 26 , 198504 St. Petersburg , Russian Federation
| | - Stanislav V Lozovskiy
- Institute of Chemistry , Saint Petersburg State University , Universitetsky pr. 26 , 198504 St. Petersburg , Russian Federation
| | - Anna G Larina
- Institute of Chemistry , Saint Petersburg State University , Universitetsky pr. 26 , 198504 St. Petersburg , Russian Federation
| | - Vitali M Boitsov
- Saint Petersburg Academic University , ul. Khlopina 8/3 , 194021 St. Petersburg , Russian Federation.,Pavlov First Saint Petersburg State Medical University , ul. L'va Tolstogo 6/8 , 197022 St. Petersburg , Russian Federation
| | - Alexander V Stepakov
- Institute of Chemistry , Saint Petersburg State University , Universitetsky pr. 26 , 198504 St. Petersburg , Russian Federation.,Saint Petersburg State Institute of Technology , Moskovskii pr. 26 , 190013 St. Petersburg , Russian Federation
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Larina AG, Filatov AS, Suslonov VV, Molchanov AP, Stepakov AV. The reactions of 1,1-diarylallenes with N-acyliminium cations generated from hydroxylactams. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.05.071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Efremova MM, Kostikov RR, Stepakov AV, Panikorovsky TL, Shcherbakova VS, Ivanov AV, Molchanov AP. Unusual Lewis-acid catalyzed formal (3+3)-cycloaddition of azomethine imines and nitrones to N-vinylpyrroles. Tetrahedron 2017. [DOI: 10.1016/j.tet.2016.12.034] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Filatov AS, Knyazev NA, Molchanov AP, Panikorovsky TL, Kostikov RR, Larina AG, Boitsov VM, Stepakov AV. Synthesis of Functionalized 3-Spiro[cyclopropa[a]pyrrolizine]- and 3-Spiro[3-azabicyclo[3.1.0]hexane]oxindoles from Cyclopropenes and Azomethine Ylides via [3 + 2]-Cycloaddition. J Org Chem 2017; 82:959-975. [PMID: 28004934 DOI: 10.1021/acs.joc.6b02505] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
3-Spiro[cyclopropa[a]pyrrolizine]- and 3-spiro[3-azabicyclo[3.1.0]hexane]oxindoles were prepared in moderate to high yields via one-pot three-component reactions using substituted isatins, α-amino acids, and cyclopropenes. The key step is an intramolecular [3 + 2]-cycloaddition reaction of an in situ generated azomethine ylide onto a cyclopropene. Both N-substituted and N-unsubstituted α-amino acids, dipeptide Gly-Gly, and also benzylamine were used as the amine component for the azomethine ylide generation. The anticancer activity of some of the obtained compounds against human leukemia K562 cell line was evaluated by flow cytometry in vitro.
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Affiliation(s)
- Alexander S Filatov
- Saint-Petersburg State University , 7/9 Universitetskaya nab., St. Petersburg, 199034, Russian Federation
| | - Nickolay A Knyazev
- Saint-Petersburg Academic University - Nanotechnology Research and Education Centre RAS , ul. Khlopina 8/3, St. Petersburg, 194021, Russian Federation.,Institute of Cytology of the Russian Academy of Science , Tikhoretsky pr. 4, St. Petersburg 194064, Russian Federation
| | - Alexander P Molchanov
- Saint-Petersburg State University , 7/9 Universitetskaya nab., St. Petersburg, 199034, Russian Federation
| | - Taras L Panikorovsky
- Saint-Petersburg State University , 7/9 Universitetskaya nab., St. Petersburg, 199034, Russian Federation
| | - Rafael R Kostikov
- Saint-Petersburg State University , 7/9 Universitetskaya nab., St. Petersburg, 199034, Russian Federation
| | - Anna G Larina
- Saint-Petersburg State University , 7/9 Universitetskaya nab., St. Petersburg, 199034, Russian Federation
| | - Vitali M Boitsov
- Saint-Petersburg Academic University - Nanotechnology Research and Education Centre RAS , ul. Khlopina 8/3, St. Petersburg, 194021, Russian Federation.,Pavlov First Saint Petersburg State Medical University , ul. L'va Tolstogo 6/8, St. Petersburg 197022, Russian Federation
| | - Alexander V Stepakov
- Saint-Petersburg State University , 7/9 Universitetskaya nab., St. Petersburg, 199034, Russian Federation.,Voeikov Main Geophysical Observatory , ul. Karbysheva 7, St. Petersburg 194021, Russian Federation
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Larina AG, Nosova VE, Filatov AS, Molchanov AP, Starova GL, Zolotarev AA, Boitsov VM, Stepakov AV. The first example of the reactions of cyclopropenes with N-acyliminium cations generated from hydroxylactams. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.06.052] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Efremova MM, Molchanov AP, Larina AG, Starova GL, Kostikov RR, Stepakov AV. Acid-Induced Rearrangement of Cycloadducts from Cyclopropenecarboxylates and 1,3-Diarylisobenzofurans. Helv Chim Acta 2016. [DOI: 10.1002/hlca.201500114] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Mariia M. Efremova
- Chemistry Department; Saint-Petersburg State University; Universitetsky prosp. 26 RU-St-Petersburg 198504
| | - Alexander P. Molchanov
- Chemistry Department; Saint-Petersburg State University; Universitetsky prosp. 26 RU-St-Petersburg 198504
| | - Anna G. Larina
- Chemistry Department; Saint-Petersburg State University; Universitetsky prosp. 26 RU-St-Petersburg 198504
| | - Galina L. Starova
- Chemistry Department; Saint-Petersburg State University; Universitetsky prosp. 26 RU-St-Petersburg 198504
| | - Rafael R. Kostikov
- Chemistry Department; Saint-Petersburg State University; Universitetsky prosp. 26 RU-St-Petersburg 198504
| | - Alexander V. Stepakov
- Chemistry Department; Saint-Petersburg State University; Universitetsky prosp. 26 RU-St-Petersburg 198504
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Ledovskaya MS, Stepakov AV, Molchanov AP, Kostikov RR. An efficient synthesis of substituted spiro[isoxazolopyrroloisoquinolines] via diastereoselective N-acyliminium ion cyclization. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.08.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Ledovskaya MS, Molchanov AP, Boitsov VM, Kostikov RR, Stepakov AV. An efficient synthesis of substituted isoxazolopyrroloisoquinolines via diastereoselective N-acyliminium ion cyclization. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.02.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Efremova MM, Molchanov AP, Stepakov AV, Kostikov RR, Shcherbakova VS, Ivanov AV. A highly efficient [3+2] cycloaddition of nitrile oxides and azomethine imines to N-vinylpyrroles. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.02.058] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Stepakov AV, Boitsov VM, Larina AG, Molchanov AP. Acid-induced rearrangement of cycloadducts from N-aryl itaconimides and 1,3-diphenylisobenzofuran. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.06.107] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Malinina J, Tran TQ, Stepakov AV, Gurzhiy VV, Starova GL, Kostikov RR, Molchanov AP. [3+2] Cycloaddition reactions of arylallenes with C-(N-arylcarbamoyl)- and C,C-bis(methoxycarbonyl)nitrones and subsequent rearrangements. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.04.107] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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19
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Stepakov AV, Ledovskaya MS, Boitsov VM, Molchanov AP, Kostikov RR, Gurzhiy VV, Starova GL. Synthesis of isoxazolopyrroloisoquinolines by intramolecular cyclizations of 5-(2-arylethyl)-6-hydroxytetrahydro-4H-pyrrolo[3,4-d]isoxazol-4-ones. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.07.114] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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20
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Larina AG, Stepakov AV, Boitsov VM, Molchanov AP, Gurzhiy VV, Starova GL, Lykholay AN. The first example of 1,3-dipolar cycloaddition reactions of nitrones to vinylidenecyclopropanes. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.08.116] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Stepakov AV, Kinzhalov MA, Boitsov VM, Stepakova LV, Starova GL, Vyazmin SY, Grinenko EV. A new approach to the synthesis of 4-(N-aryl)carbamoylmethyl-4,5-dihydropyridazin-3(2H)-ones. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.04.038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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22
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Stepakov AV, Popova EA, Stepakova LV, Boitsov VM, Starova GL, Grinenko EV. (4+2) Dimerization of imides of arylmaleic acids in the presence of the 3,5-dimethyl-1H-pyrazole and 2,6-lutidine. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.04.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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23
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Baird MS, Boitsov VM, Stepakov AV, Molchanov AP, Kopf J, Rajaratnam M, Kostikov RR. Preparation and reactions of some 2,2-difunctional 1,1-dibromocyclopropanes. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.04.104] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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24
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Stepakov AV, Molchanov AP, Magull J, Vidović D, Starova GL, Kopf J, Kostikov RR. The methoxycarbonylcarbene insertion into 1,3-dithiolane and 1,3-oxathiolane rings. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.01.100] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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25
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