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Obydennik AY, Titov AA, Listratova AV, Borisova TN, Sokolova IL, Rybakov VB, Van der Eycken EV, Voskressensky LG, Varlamov AV. Divergent and Nucleophile-Assisted Rearrangement in the Construction of Pyrrolo[2,1-b][3]benzazepine and Pyrido[2,1-a]isoquinoline Scaffolds. Chemistry 2024; 30:e202302919. [PMID: 37864779 DOI: 10.1002/chem.202302919] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 10/12/2023] [Accepted: 10/20/2023] [Indexed: 10/23/2023]
Abstract
Under microwave (MW) irradiation at 150 °C in toluene and in the presence of nucleophiles (DMAP, triphenylphosphine and tetrahydrothiophene) 1-substituted 1-ethynyl-2-vinyldi- and tetrahydroisoquinolines undergo [3,3]-sigmatropic rearrangement providing pyrrolo[2,1-b][3]benzazepines in good yields. The replacement of toluene with acetonitrile directs the rearrangement towards the formation of 7,11b-dihydro-6H-pyrido[2,1-a]isoquinolines.
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Affiliation(s)
- Arina Y Obydennik
- Organic Chemistry Department, Science Faculty, Рeoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St, Moscow, 117198, Russian Federation
| | - Alexander A Titov
- Organic Chemistry Department, Science Faculty, Рeoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St, Moscow, 117198, Russian Federation
| | - Anna V Listratova
- Organic Chemistry Department, Science Faculty, Рeoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St, Moscow, 117198, Russian Federation
| | - Tatiana N Borisova
- Organic Chemistry Department, Science Faculty, Рeoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St, Moscow, 117198, Russian Federation
| | - Irina L Sokolova
- Organic Chemistry Department, Science Faculty, Рeoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St, Moscow, 117198, Russian Federation
| | - Victor B Rybakov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1-3, Moscow, 119991, Russian Federation
| | - Erik V Van der Eycken
- Organic Chemistry Department, Science Faculty, Рeoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St, Moscow, 117198, Russian Federation
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, Leuven, 3001, Belgium
| | - Leonid G Voskressensky
- Organic Chemistry Department, Science Faculty, Рeoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St, Moscow, 117198, Russian Federation
| | - Alexey V Varlamov
- Organic Chemistry Department, Science Faculty, Рeoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St, Moscow, 117198, Russian Federation
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Wang YJ, Zhao LM. Synthesis of 10-Membered Azecines through Pd-Catalyzed Formal [6+4] Cycloaddition and Their Transannular Reaction to Polycyclic Compounds. Chemistry 2023; 29:e202302111. [PMID: 37776147 DOI: 10.1002/chem.202302111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 09/17/2023] [Accepted: 09/25/2023] [Indexed: 10/01/2023]
Abstract
Azecine fragments are frequently presented in natural products and bioactive compounds. However, minor efforts have been devoted to these 10-membered N-heterocycles, and their synthesis is still challenging. Reported herein is the first catalytic formal [6+4] cycloaddition for the synthesis of 10-membered azecines. Under palladium catalysis, the reaction of δ-vinylvalerolactones and benzofuran-derived azadienes proceeds smoothly to afford benzofuran-fused azecines with high diastereoselectivity in moderate to good yields. A unique transannular reaction of these 10-membered azecines for the construction of polycyclic compounds is also demonstrated.
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Affiliation(s)
- Yu-Jiao Wang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116, Jiangsu, China
| | - Li-Ming Zhao
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116, Jiangsu, China
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Tito AA, Obydennik AY, Borisova TN, Sorokina EA, Voskressensky LG, Varlamov AV, Thi TAD, Le NTG, Le TA. Development of new approach for the synthesis of 6-perfluoroalkyl substituted allene benzazecines and study of the nature of properties due to the presence of perfluoroalkyl groups. J Fluor Chem 2023. [DOI: 10.1016/j.jfluchem.2023.110109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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Titov AA, Purgatorio R, Obydennik AY, Listratova AV, Borisova TN, de Candia M, Catto M, Altomare CD, Varlamov AV, Voskressensky LG. Synthesis of Isomeric 3-Benzazecines Decorated with Endocyclic Allene Moiety and Exocyclic Conjugated Double Bond and Evaluation of Their Anticholinesterase Activity. Molecules 2022; 27:molecules27196276. [PMID: 36234811 PMCID: PMC9571408 DOI: 10.3390/molecules27196276] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 09/17/2022] [Accepted: 09/19/2022] [Indexed: 11/29/2022] Open
Abstract
Transformations of 1-methoxymethylethynyl substituted isoquinolines triggered by terminal alkynes in alcohols were studied and new 3-benzazecine-containing compounds synthesized, such as 6-methoxymethyl-3-benzazecines incorporating an endocyclic C6–C8 allene fragment and the -ylidene derivatives 6-methoxymethylene-3-benzazecines. The reaction mechanisms were investigated and a preliminary in vitro screening of their potential inhibitory activities against human acetyl- and butyrylcholinesterases (AChE and BChE) and monoamine oxidases A and B (MAO-A and MAO-B) showed that the allene compounds were more potent than the corresponding -ylidene ones as selective AChE inhibitors. Among the allenes, 3e (R3 = CH2OMe) was found to be a competitive AChE inhibitor with a low micromolar inhibition constant value (Ki = 4.9 μM), equipotent with the corresponding 6-phenyl derivative 3n (R3 = Ph, Ki = 4.5 μM), but 90-fold more water-soluble.
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Affiliation(s)
- Alexander A. Titov
- Organic Chemistry Department, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St, Moscow 117198, Russia
| | - Rosa Purgatorio
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro, Via E. Orabona 4, 70125 Bari, Italy
| | - Arina Y. Obydennik
- Organic Chemistry Department, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St, Moscow 117198, Russia
| | - Anna V. Listratova
- Organic Chemistry Department, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St, Moscow 117198, Russia
| | - Tatiana N. Borisova
- Organic Chemistry Department, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St, Moscow 117198, Russia
| | - Modesto de Candia
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro, Via E. Orabona 4, 70125 Bari, Italy
| | - Marco Catto
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro, Via E. Orabona 4, 70125 Bari, Italy
| | - Cosimo D. Altomare
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro, Via E. Orabona 4, 70125 Bari, Italy
- Correspondence: ; Tel.: +39-080-5442781
| | - Alexey V. Varlamov
- Organic Chemistry Department, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St, Moscow 117198, Russia
| | - Leonid G. Voskressensky
- Organic Chemistry Department, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St, Moscow 117198, Russia
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Listratova AV, Titov AA, Obydennik AY, Varlamov AV. N-propargyl aza-Claisen rearrangement in the synthesis of heterocycles. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Kobzev MS, Titov AA, Alexandrova EV, Purgatorio R, Catto M, Sorokina EA, Borisova TN, Varlamov AV, Altomare CD, Voskressensky LG. Synthesis of 8-phenyl substituted 3-benzazecines with allene moiety, their thermal rearrangement and evaluation as acetylcholinesterase inhibitors. Mol Divers 2021; 26:1243-1247. [PMID: 33538985 DOI: 10.1007/s11030-021-10185-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Accepted: 01/16/2021] [Indexed: 11/30/2022]
Abstract
Various 4'-R-substituted phenyl azacyclic allenes were synthesized in good yields, and their thermal transformations were studied. For the first time, the obtained rearrangement products-new N-bridged cyclopenta[a]indenes, and the corresponding parent allenes were evaluated as potential inhibitors of acetyl- and butyrylcholinesterase. Among the tested compounds, the allene derivative 2g proved to competitively inhibit human AChE with inhibition constant value (Ki) in the low micromolar range.
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Affiliation(s)
- Maxim S Kobzev
- Organic Chemistry Department, Peoples' Friendship, University of Russia (RUDN University), 6, Miklukho-Maklaya St., Moscow, 117198, Russian Federation
| | - Alexander A Titov
- Organic Chemistry Department, Peoples' Friendship, University of Russia (RUDN University), 6, Miklukho-Maklaya St., Moscow, 117198, Russian Federation.
| | - Elena V Alexandrova
- Organic Chemistry Department, Peoples' Friendship, University of Russia (RUDN University), 6, Miklukho-Maklaya St., Moscow, 117198, Russian Federation
| | - Rosa Purgatorio
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro, Via E. Orabona 4, 70125, Bari, Italy
| | - Marco Catto
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro, Via E. Orabona 4, 70125, Bari, Italy
| | - Elena A Sorokina
- Organic Chemistry Department, Peoples' Friendship, University of Russia (RUDN University), 6, Miklukho-Maklaya St., Moscow, 117198, Russian Federation
| | - Tatiana N Borisova
- Organic Chemistry Department, Peoples' Friendship, University of Russia (RUDN University), 6, Miklukho-Maklaya St., Moscow, 117198, Russian Federation
| | - Alexey V Varlamov
- Organic Chemistry Department, Peoples' Friendship, University of Russia (RUDN University), 6, Miklukho-Maklaya St., Moscow, 117198, Russian Federation
| | - Cosimo D Altomare
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro, Via E. Orabona 4, 70125, Bari, Italy
| | - Leonid G Voskressensky
- Organic Chemistry Department, Peoples' Friendship, University of Russia (RUDN University), 6, Miklukho-Maklaya St., Moscow, 117198, Russian Federation
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Titov AA, Kobzev MS, Catto M, Candia MD, Gambacorta N, Denora N, Pisani L, Nicolotti O, Borisova TN, Varlamov AV, Voskressensky LG, Altomare CD. Away from Flatness: Unprecedented Nitrogen-Bridged Cyclopenta[ a]indene Derivatives as Novel Anti-Alzheimer Multitarget Agents. ACS Chem Neurosci 2021; 12:340-353. [PMID: 33395258 DOI: 10.1021/acschemneuro.0c00706] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Nature-inspired, bridged polycyclic molecules share low similarity with currently available drugs, containing preferentially planar and/or achiral moieties. This "Escape from Flatland" scenario, aimed at exploring pharmacological properties of atypical molecular scaffolds, finds interest in synthetic routes leading to tridimensional-shaped molecules. Herein we report on the synthesis of N-bridged cyclopenta[a]indene derivatives, achieved through microwave-assisted thermal rearrangement of allene 3-benzazecines with high diastereoselectivity. The biological evaluation disclosed selective inhibition of human acetylcholinesterase or butyrylcholinesterase, depending on the substitution around the molecular core, which was rationalized by means of docking simulations. The most potent BChE inhibitor 31 was effective in neuroprotection from glutamatergic excitotoxicity and displayed low intrinsic cytotoxicity and good brain penetration. Overall, compound 31 and its close congeners 34 and 35 acted as multitarget agents addressing different biological events involved in neurodegeneration, particularly in the progression of Alzheimer's disease.
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Affiliation(s)
- Alexander A. Titov
- Organic Chemistry Department, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St, Moscow 117198, Russian Federation
| | - Maxim S. Kobzev
- Organic Chemistry Department, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St, Moscow 117198, Russian Federation
| | - Marco Catto
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro, Via E. Orabona 4, 70125 Bari, Italy
| | - Modesto de Candia
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro, Via E. Orabona 4, 70125 Bari, Italy
| | - Nicola Gambacorta
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro, Via E. Orabona 4, 70125 Bari, Italy
| | - Nunzio Denora
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro, Via E. Orabona 4, 70125 Bari, Italy
| | - Leonardo Pisani
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro, Via E. Orabona 4, 70125 Bari, Italy
| | - Orazio Nicolotti
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro, Via E. Orabona 4, 70125 Bari, Italy
| | - Tatiana N. Borisova
- Organic Chemistry Department, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St, Moscow 117198, Russian Federation
| | - Alexey V. Varlamov
- Organic Chemistry Department, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St, Moscow 117198, Russian Federation
| | - Leonid G. Voskressensky
- Organic Chemistry Department, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St, Moscow 117198, Russian Federation
| | - Cosimo D. Altomare
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari Aldo Moro, Via E. Orabona 4, 70125 Bari, Italy
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Titov AA, Kobzev MS, Borisova TN, Listratova AV, Evenko TV, Varlamov AV, Voskressensky LG. Facile Methods for the Synthesis of 8-Ylidene-1,2,3,8-tetrahydrobenzazecines. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000203] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Alexander A. Titov
- Organic Chemistry Department; Peoples' Friendship University of Russia (RUDN University); 6 Miklukho-Maklaya St Moscow 117198 Russian Federation
| | - Maxim S. Kobzev
- Organic Chemistry Department; Peoples' Friendship University of Russia (RUDN University); 6 Miklukho-Maklaya St Moscow 117198 Russian Federation
| | - Tatiana N. Borisova
- Organic Chemistry Department; Peoples' Friendship University of Russia (RUDN University); 6 Miklukho-Maklaya St Moscow 117198 Russian Federation
| | - Anna V. Listratova
- Organic Chemistry Department; Peoples' Friendship University of Russia (RUDN University); 6 Miklukho-Maklaya St Moscow 117198 Russian Federation
| | - Tatiana V. Evenko
- Organic Chemistry Department; Peoples' Friendship University of Russia (RUDN University); 6 Miklukho-Maklaya St Moscow 117198 Russian Federation
| | - Alexey V. Varlamov
- Organic Chemistry Department; Peoples' Friendship University of Russia (RUDN University); 6 Miklukho-Maklaya St Moscow 117198 Russian Federation
| | - Leonid G. Voskressensky
- Organic Chemistry Department; Peoples' Friendship University of Russia (RUDN University); 6 Miklukho-Maklaya St Moscow 117198 Russian Federation
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3-benzazecine-based cyclic allene derivatives as highly potent P-glycoprotein inhibitors overcoming doxorubicin multidrug resistance. Future Med Chem 2019; 11:2095-2106. [DOI: 10.4155/fmc-2019-0037] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Aim: Enamino 3-benzazecine compounds, incorporating the C6-C8 allene system, were synthesized and evaluated in vitro as inhibitors of P-glycoprotein (P-gp) and/or multidrug resistance-associated protein 1 (MRP1), two efflux pumps mainly connected with multidrug resistance (MDR) in cancer cells. Results & methodology: Most of the synthesized compounds were selective P-gp inhibitors in Calcein-AM uptake assay. Structure–activity relationships (SARs) pointed out that CO2Me derivatives are more potent than acetyl derivatives, and 10,11-dimethoxy compounds are five to tenfold more potent inhibitors than the respective unsubstituted compounds, and that the P-gp inhibition potency is mainly related to volume parameters. Conclusion: Nanomolar P-gp inhibitors, such as 23 (IC50 = 4.2 nM), restored the antiproliferative activity of doxorubicin in multidrug-resistant cells. The observed activities showed that 3-benzazecine-based compounds may be promising MDR reversers.
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Transformation of 2-methyl-1-phenylethynyl-1,2,3,4-tetrahydroisoquinoline by the action of activated alkynes. Chem Heterocycl Compd (N Y) 2018. [DOI: 10.1007/s10593-018-2306-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Konovalov AI, Antipin IS, Burilov VA, Madzhidov TI, Kurbangalieva AR, Nemtarev AV, Solovieva SE, Stoikov II, Mamedov VA, Zakharova LY, Gavrilova EL, Sinyashin OG, Balova IA, Vasilyev AV, Zenkevich IG, Krasavin MY, Kuznetsov MA, Molchanov AP, Novikov MS, Nikolaev VA, Rodina LL, Khlebnikov AF, Beletskaya IP, Vatsadze SZ, Gromov SP, Zyk NV, Lebedev AT, Lemenovskii DA, Petrosyan VS, Nenaidenko VG, Negrebetskii VV, Baukov YI, Shmigol’ TA, Korlyukov AA, Tikhomirov AS, Shchekotikhin AE, Traven’ VF, Voskresenskii LG, Zubkov FI, Golubchikov OA, Semeikin AS, Berezin DB, Stuzhin PA, Filimonov VD, Krasnokutskaya EA, Fedorov AY, Nyuchev AV, Orlov VY, Begunov RS, Rusakov AI, Kolobov AV, Kofanov ER, Fedotova OV, Egorova AY, Charushin VN, Chupakhin ON, Klimochkin YN, Osyanin VA, Reznikov AN, Fisyuk AS, Sagitullina GP, Aksenov AV, Aksenov NA, Grachev MK, Maslennikova VI, Koroteev MP, Brel’ AK, Lisina SV, Medvedeva SM, Shikhaliev KS, Suboch GA, Tovbis MS, Mironovich LM, Ivanov SM, Kurbatov SV, Kletskii ME, Burov ON, Kobrakov KI, Kuznetsov DN. Modern Trends of Organic Chemistry in Russian Universities. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2018. [DOI: 10.1134/s107042801802001x] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Anh LT, Titov AA, Kobzev MS, Voskressensky LG, Varlamov AV, Dorovatovskii PV, Khrustalev VN. Unusual thermolysis of aza-cyclic allene under microwave conditions: crystal structure of (3 RS,3a SR,8 RS,8a RS)-methyl 5,6-dimeth-oxy-3a,10-dimethyl-1-phenyl-3,3a,8,8a-tetra-hydro-3,8-(epimino-methano)-cyclo-penta-[ a]indene-2-carboxyl-ate from synchrotron X-ray diffraction. Acta Crystallogr E Crystallogr Commun 2017; 73:1770-1773. [PMID: 29152370 PMCID: PMC5683510 DOI: 10.1107/s2056989017014864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Accepted: 10/13/2017] [Indexed: 11/16/2022]
Abstract
The title compound, C25H27NO4 (I), the product of the unusual thermolysis of aza-cyclic allene methyl 10,11-dimeth-oxy-3,8-dimethyl-6-phenyl-3-aza-benzo[d]cyclo-deca-4,6,7-triene-5-carboxyl-ate, represents a bicyclic heterosystem and crystallizes in the monoclinic space group P21/c with three crystallographically independent mol-ecules in the unit cell. These independent mol-ecules adopt very similar geometries and differ only in the conformations of the two meth-oxy substituents on the benzene ring. In two of the three independent mol-ecules, both meth-oxy groups are almost coplanar with the benzene ring [the C-C-O-Me torsion angles are 10.8 (2), 12.3 (2), 9.1 (2) and 13.6 (3)°], whereas in the third mol-ecule, one of the meth-oxy groups is practically coplanar to and the other meth-oxy group is roughly perpendicular to the benzene ring, the C-C-O-Me torsion angles being 14.1 (2) and 76.5 (2)°. The mol-ecule of (I) comprises a fused tetra-cyclic system containing two five-membered rings (cyclo-pentenes) and two six-membered rings (piperidine and benzene). The five-membered rings have the usual envelope conformation, with the methyl-subsituted C atom as the flap in each molecule, and the six-membered piperidine ring has a chair conformation. The methyl substituent at the N atom occupies the sterically favourable equatorial position. The carboxyl-ate group lies almost within the basal plane of the parent cyclo-pentene ring [making dihedral angle of 11.68 (8), 18.94 (9) and 15.16 (9)° in the three independent mol-ecules], while the phenyl substituent is twisted by 48.26 (6), 42.04 (6) and 41.28 (6)° (for the three independent mol-ecules) relative to this plane. In the crystal, mol-ecules of (I) form stacks along the b-axis direction. The mol-ecules are arranged at van der Waals distances.
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Affiliation(s)
- Le Tuan Anh
- Department of Pharmaceutical Chemistry, Faculty of Chemistry, VNU University of Science, 19 Le Thanh Tong, Hoan Kiem, Hanoi 100000, Vietnam
| | - Alexander A. Titov
- Organic Chemistry Department, Peoples’ Friendship University of Russia, (RUDN University), Miklukho-Maklay St., 6, Moscow 117198, Russian Federation
| | - Maxim S. Kobzev
- Organic Chemistry Department, Peoples’ Friendship University of Russia, (RUDN University), Miklukho-Maklay St., 6, Moscow 117198, Russian Federation
| | - Leonid G. Voskressensky
- Organic Chemistry Department, Peoples’ Friendship University of Russia, (RUDN University), Miklukho-Maklay St., 6, Moscow 117198, Russian Federation
| | - Alexey V. Varlamov
- Organic Chemistry Department, Peoples’ Friendship University of Russia, (RUDN University), Miklukho-Maklay St., 6, Moscow 117198, Russian Federation
| | - Pavel V. Dorovatovskii
- National Research Centre "Kurchatov Institute", 1 Acad. Kurchatov Sq., Moscow 123182, Russian Federation
| | - Victor N. Khrustalev
- Inorganic Chemistry Department, Peoples’ Friendship University of Russia, (RUDN University), Miklukho-Maklay St., 6, Moscow 117198, Russian Federation
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