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Moshkina TN, Kopotilova AE, Ivan’kina MA, Starnovskaya ES, Gazizov DA, Nosova EV, Kopchuk DS, El’tsov OS, Slepukhin PA, Charushin VN. Design, Synthesis, and Photophysical Properties of 5-Aminobiphenyl Substituted [1,2,4]Triazolo[4,3- c]- and [1,2,4]Triazolo[1,5- c]quinazolines. Molecules 2024; 29:2497. [PMID: 38893371 PMCID: PMC11173969 DOI: 10.3390/molecules29112497] [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: 04/18/2024] [Revised: 05/22/2024] [Accepted: 05/23/2024] [Indexed: 06/21/2024] Open
Abstract
Two series of novel [1,2,4]triazolo[4,3-c]- and [1,2,4]triazolo[1,5-c]quinazoline fluorophores with 4'-amino[1,1']-biphenyl residue at position 5 have been prepared via Pd-catalyzed cross-coupling Suzuki-Miyaura reactions. The treatment of 2-(4-bromophenyl)-4-hydrazinoquinazoline with orthoesters in solvent-free conditions or in absolute ethanol leads to the formation of [4,3-c]-annulated triazoloquinazolines, whereas [1,5-c] isomers are formed in acidic media as a result of Dimroth rearrangement. A 1D-NMR and 2D-NMR spectroscopy, as well as a single-crystal X-ray diffraction analysis, unambiguously confirmed the annelation type and determined the molecular structure of p-bromophenyl intermediates and target products. Photophysical properties of the target compounds were investigated in two solvents and in the solid state and compared with those of related 3-aryl-substituted [1,2,4]triazolo[4,3-c]quinazolines. The exclusion of the aryl fragment from the triazole ring has been revealed to improve fluorescence quantum yield in solution. Most of the synthesized structures show moderate to high quantum yields in solution. Additionally, the effect of solvent polarity on the absorption and emission spectra of fluorophores has been studied, and considerable fluorosolvatochromism has been stated. Moreover, electrochemical investigation and DFT calculations have been performed; their results are consistent with the experimental observation.
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Affiliation(s)
- Tatyana N. Moshkina
- Organic and Biomolecular Chemistry Department, Chemical Technology Institute, Ural Federal University, Mira St. 19, 620002 Ekaterinburg, Russia; (T.N.M.); (A.E.K.); (E.S.S.); (D.S.K.); (O.S.E.); (P.A.S.); (V.N.C.)
| | - Alexandra E. Kopotilova
- Organic and Biomolecular Chemistry Department, Chemical Technology Institute, Ural Federal University, Mira St. 19, 620002 Ekaterinburg, Russia; (T.N.M.); (A.E.K.); (E.S.S.); (D.S.K.); (O.S.E.); (P.A.S.); (V.N.C.)
| | - Marya A. Ivan’kina
- Organic and Biomolecular Chemistry Department, Chemical Technology Institute, Ural Federal University, Mira St. 19, 620002 Ekaterinburg, Russia; (T.N.M.); (A.E.K.); (E.S.S.); (D.S.K.); (O.S.E.); (P.A.S.); (V.N.C.)
| | - Ekaterina S. Starnovskaya
- Organic and Biomolecular Chemistry Department, Chemical Technology Institute, Ural Federal University, Mira St. 19, 620002 Ekaterinburg, Russia; (T.N.M.); (A.E.K.); (E.S.S.); (D.S.K.); (O.S.E.); (P.A.S.); (V.N.C.)
| | - Denis A. Gazizov
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, S. Kovalevskaya Str., 22, 620108 Ekaterinburg, Russia;
| | - Emiliya V. Nosova
- Organic and Biomolecular Chemistry Department, Chemical Technology Institute, Ural Federal University, Mira St. 19, 620002 Ekaterinburg, Russia; (T.N.M.); (A.E.K.); (E.S.S.); (D.S.K.); (O.S.E.); (P.A.S.); (V.N.C.)
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, S. Kovalevskaya Str., 22, 620108 Ekaterinburg, Russia;
| | - Dmitry S. Kopchuk
- Organic and Biomolecular Chemistry Department, Chemical Technology Institute, Ural Federal University, Mira St. 19, 620002 Ekaterinburg, Russia; (T.N.M.); (A.E.K.); (E.S.S.); (D.S.K.); (O.S.E.); (P.A.S.); (V.N.C.)
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, S. Kovalevskaya Str., 22, 620108 Ekaterinburg, Russia;
| | - Oleg S. El’tsov
- Organic and Biomolecular Chemistry Department, Chemical Technology Institute, Ural Federal University, Mira St. 19, 620002 Ekaterinburg, Russia; (T.N.M.); (A.E.K.); (E.S.S.); (D.S.K.); (O.S.E.); (P.A.S.); (V.N.C.)
| | - Pavel A. Slepukhin
- Organic and Biomolecular Chemistry Department, Chemical Technology Institute, Ural Federal University, Mira St. 19, 620002 Ekaterinburg, Russia; (T.N.M.); (A.E.K.); (E.S.S.); (D.S.K.); (O.S.E.); (P.A.S.); (V.N.C.)
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, S. Kovalevskaya Str., 22, 620108 Ekaterinburg, Russia;
| | - Valery N. Charushin
- Organic and Biomolecular Chemistry Department, Chemical Technology Institute, Ural Federal University, Mira St. 19, 620002 Ekaterinburg, Russia; (T.N.M.); (A.E.K.); (E.S.S.); (D.S.K.); (O.S.E.); (P.A.S.); (V.N.C.)
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, S. Kovalevskaya Str., 22, 620108 Ekaterinburg, Russia;
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Sirakanyan S, Arabyan E, Hakobyan A, Hakobyan T, Chilingaryan G, Sahakyan H, Sargsyan A, Arakelov G, Nazaryan K, Izmailyan R, Abroyan L, Karalyan Z, Arakelova E, Hakobyan E, Hovakimyan A, Serobian A, Neves M, Ferreira J, Ferreira F, Zakaryan H. A new microtubule-stabilizing agent shows potent antiviral effects against African swine fever virus with no cytotoxicity. Emerg Microbes Infect 2021; 10:783-796. [PMID: 33706677 PMCID: PMC8079068 DOI: 10.1080/22221751.2021.1902751] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 03/09/2021] [Accepted: 03/09/2021] [Indexed: 11/25/2022]
Abstract
African swine fever virus (ASFV) is the causal agent of a fatal disease of domestic swine for which no effective antiviral drugs are available. Recently, it has been shown that microtubule-targeting agents hamper the infection cycle of different viruses. In this study, we conducted in silico screening against the colchicine binding site (CBS) of tubulin and found three new compounds with anti-ASFV activity. The most promising antiviral compound (6b) reduced ASFV replication in a dose-dependent manner (IC50 = 19.5 μM) with no cellular (CC50 > 500 μM) and animal toxicity (up to 100 mg/kg). Results also revealed that compound 6b interfered with ASFV attachment, internalization and egress, with time-of-addition assays, showing that compound 6b has higher antiviral effects when added within 2-8 h post-infection. This compound significantly inhibited viral DNA replication and disrupted viral protein synthesis. Experiments with ASFV-infected porcine macrophages disclosed that antiviral effects of the compound 6b were similar to its effects in Vero cells. Tubulin polymerization assay and confocal microscopy demonstrated that compound 6b promoted tubulin polymerization, acting as a microtubule-stabilizing, rather than a destabilizing agent in cells. In conclusion, this work emphasizes the idea that microtubules can be targets for drug development against ASFV.
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Affiliation(s)
- Samvel Sirakanyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of NAS, Institute of Fine Organic Chemistry of A.L. Mnjoyan, Yerevan, Armenia
| | - Erik Arabyan
- Group of Antiviral Defense Mechanisms, Institute of Molecular Biology of NAS, Yerevan, Armenia
| | - Astghik Hakobyan
- Group of Antiviral Defense Mechanisms, Institute of Molecular Biology of NAS, Yerevan, Armenia
| | - Tamara Hakobyan
- Group of Antiviral Defense Mechanisms, Institute of Molecular Biology of NAS, Yerevan, Armenia
| | - Garri Chilingaryan
- Group of Antiviral Defense Mechanisms, Institute of Molecular Biology of NAS, Yerevan, Armenia
| | - Harutyun Sahakyan
- Group of Antiviral Defense Mechanisms, Institute of Molecular Biology of NAS, Yerevan, Armenia
| | - Arsen Sargsyan
- Group of Antiviral Defense Mechanisms, Institute of Molecular Biology of NAS, Yerevan, Armenia
| | - Grigor Arakelov
- Group of Antiviral Defense Mechanisms, Institute of Molecular Biology of NAS, Yerevan, Armenia
| | - Karen Nazaryan
- Group of Antiviral Defense Mechanisms, Institute of Molecular Biology of NAS, Yerevan, Armenia
- Russian-Armenian University, Yerevan, Armenia
| | - Roza Izmailyan
- Group of Antiviral Defense Mechanisms, Institute of Molecular Biology of NAS, Yerevan, Armenia
| | - Liana Abroyan
- Group of Antiviral Defense Mechanisms, Institute of Molecular Biology of NAS, Yerevan, Armenia
| | - Zaven Karalyan
- Group of Antiviral Defense Mechanisms, Institute of Molecular Biology of NAS, Yerevan, Armenia
- Department of Medical Biology, Yerevan State Medical University, Yerevan, Armenia
| | - Elina Arakelova
- Group of Antiviral Defense Mechanisms, Institute of Molecular Biology of NAS, Yerevan, Armenia
| | - Elmira Hakobyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of NAS, Institute of Fine Organic Chemistry of A.L. Mnjoyan, Yerevan, Armenia
| | - Anush Hovakimyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of NAS, Institute of Fine Organic Chemistry of A.L. Mnjoyan, Yerevan, Armenia
| | - Andre Serobian
- Advanced Solutions Center, Foundation for Armenian Science and Technology, Yerevan, Armenia
| | - Marco Neves
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
| | - João Ferreira
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
| | - Fernando Ferreira
- Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Avenida da Universidade Técnica, Lisboa, Portugal
| | - Hovakim Zakaryan
- Group of Antiviral Defense Mechanisms, Institute of Molecular Biology of NAS, Yerevan, Armenia
- Denovo Sciences, Yerevan, Armenia
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Sirakanyan SN, Spinelli D, Geronikaki A, Kartsev V, Hakobyan EK, Petrou A, Paronikyan RG, Nazaryan IM, Akopyan HH, Hovakimyan AA. Synthesis and Neurotropic Activity of New Heterocyclic Systems: Pyridofuro[3,2- d]pyrrolo[1,2- a]pyrimidines, Pyridofuro[3,2- d]pyrido[1,2- a]pyrimidines and Pyridofuro[3',2':4,5]pyrimido[1,2- a]azepines. Molecules 2021; 26:molecules26113320. [PMID: 34205930 PMCID: PMC8198642 DOI: 10.3390/molecules26113320] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 05/26/2021] [Accepted: 05/26/2021] [Indexed: 11/18/2022] Open
Abstract
Background: Neurotic disturbances, anxiety, neurosis-like disorders, and stress situations are widespread. Benzodiazepine tranquillizers have been found to be among the most effective antianxiety drugs. The pharmacological action of benzodiazepines is due to their interaction with the supra-molecular membrane GABA-a-benzodiazepine receptor complex, linked to the Cl-ionophore. Benzodiazepines enhance GABA-ergic transmission and this has led to a study of the role of GABA in anxiety. The search for anxiolytics and anticonvulsive agents has involved glutamate-ergic, 5HT-ergic substances and neuropeptides. However, each of these well-known anxiolytics, anticonvulsants and cognition enhancers (nootropics) has repeatedly been reported to have many adverse side effects, therefore there is an urgent need to search for new drugs able to restore damaged cognitive functions without causing significant adverse reactions. Objective: Considering the relevance of epilepsy diffusion in the world, we have addressed our attention to the discovery of new drugs in this field Thus our aim is the synthesis and study of new compounds with antiepileptic (anticonvulsant) and not only, activity. Methods: For the synthesis of compounds classical organic methods were used and developed. For the evaluation of biological activity some anticonvulsant and psychotropic methods were used. Results: As a result of multistep reactions 26 new, five-membered heterocyclic systems were obtained. PASS prediction of anticonvulsant activity was performed for the whole set of the designed molecules and probability to be active Pa values were ranging from 0.275 to 0.43. The studied compounds exhibit protection against pentylenetetrazole (PTZ) seizures, anti-thiosemicarbazides effect as well as some psychotropic effect. The biological assays evidenced that some of the studied compounds showed a high anticonvulsant activity by antagonism with pentylenetetrazole. The toxicity of compounds is low and they do not induce muscle relaxation in the studied doses. According to the study of psychotropic activity it was found that the selected compounds have an activating behavior and anxiolytic effects on the models of “open field” and “elevated plus maze” (EPM). The data obtained indicate the anxiolytic (anti-anxiety) activity of the derivatives of pyrimidines, especially pronounced in compounds 6n, 6b, and 7c. The studied compounds increase the latent time of first immobilization on the model of “forced swimming” (FST) and exhibit some antidepressant effect similarly to diazepam. Docking studies revealed that compound 6k bound tightly in the active site of GABAA receptor with a value of the scoring function that estimates free energy of binding (ΔG) at −7.95 kcal/mol, while compound 6n showed the best docking score and seems to be dual inhibitor of SERT transporter as well as 5-HT1A receptor. Conclusions: Тhe selected compounds have an anticonvulsant, activating behavior and anxiolytic effects, at the same time exhibit some antidepressant effect.
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Affiliation(s)
- Samvel N. Sirakanyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Science of Republic of Armenia, Institute of Fine Organic Chemistry of A.L. Mnjoyan, Ave. Azatutyan 26, Yerevan 0014, Armenia; (E.K.H.); (R.G.P.); (I.M.N.); (H.H.A.); (A.A.H.)
- Correspondence: (S.N.S.); (D.S.); (A.G.); Tel.: +374-91-32-15-99 (S.N.S.); +39-051-209-9478 (D.S.); +30-2310997616 (A.G.)
| | - Domenico Spinelli
- Dipartimento di Chimica G. Ciamician, Alma Mater Studiorum-Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy
- Correspondence: (S.N.S.); (D.S.); (A.G.); Tel.: +374-91-32-15-99 (S.N.S.); +39-051-209-9478 (D.S.); +30-2310997616 (A.G.)
| | - Athina Geronikaki
- School of Pharmacy, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece;
- Correspondence: (S.N.S.); (D.S.); (A.G.); Tel.: +374-91-32-15-99 (S.N.S.); +39-051-209-9478 (D.S.); +30-2310997616 (A.G.)
| | | | - Elmira K. Hakobyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Science of Republic of Armenia, Institute of Fine Organic Chemistry of A.L. Mnjoyan, Ave. Azatutyan 26, Yerevan 0014, Armenia; (E.K.H.); (R.G.P.); (I.M.N.); (H.H.A.); (A.A.H.)
| | - Anthi Petrou
- School of Pharmacy, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece;
| | - Ruzanna G. Paronikyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Science of Republic of Armenia, Institute of Fine Organic Chemistry of A.L. Mnjoyan, Ave. Azatutyan 26, Yerevan 0014, Armenia; (E.K.H.); (R.G.P.); (I.M.N.); (H.H.A.); (A.A.H.)
| | - Ivetta M. Nazaryan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Science of Republic of Armenia, Institute of Fine Organic Chemistry of A.L. Mnjoyan, Ave. Azatutyan 26, Yerevan 0014, Armenia; (E.K.H.); (R.G.P.); (I.M.N.); (H.H.A.); (A.A.H.)
| | - Hasmik H. Akopyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Science of Republic of Armenia, Institute of Fine Organic Chemistry of A.L. Mnjoyan, Ave. Azatutyan 26, Yerevan 0014, Armenia; (E.K.H.); (R.G.P.); (I.M.N.); (H.H.A.); (A.A.H.)
| | - Anush A. Hovakimyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Science of Republic of Armenia, Institute of Fine Organic Chemistry of A.L. Mnjoyan, Ave. Azatutyan 26, Yerevan 0014, Armenia; (E.K.H.); (R.G.P.); (I.M.N.); (H.H.A.); (A.A.H.)
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Synthesis and antimicrobial evaluation of novel polyheterocyclic systems derived from cyclopenta[4',5']pyrido[3',2':4,5]furo[3,2-d]pyrimidine. Chem Heterocycl Compd (N Y) 2021. [DOI: 10.1007/s10593-021-02870-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Sirakanyan SN, Kartsev VG, Geronikaki A, Spinelli D, Petrou A, Hakobyan EK, Glamoclija J, Ivanov M, Sokovic M, Hovakimyan AA. Synthesis and Evaluation of Antimicrobial Activity and Molecular Docking of New N-1,3-thiazol-2-ylacetamides of Condensed Pyrido[3',2':4,5] furo(thieno)[3,2-d]pyrimidines. Curr Top Med Chem 2020; 20:2192-2209. [DOI: 10.2174/1568026620666200628145308] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 03/16/2020] [Accepted: 04/20/2020] [Indexed: 12/12/2022]
Abstract
Background:
From the literature it is known that many derivatives of fused thienopyrimidines
and furopyrimidines possess broad spectrum of biological activity.
Objectives:
The current studies describe the synthesis and evaluation of antimicrobial activity of some
new N-1,3-thiazol-2-ylacetamides of pyrido[3',2':4,5]furo(thieno)[3,2-d]pyrimidines.
Methods:
By cyclocondensation of ethyl 1-aminofuro(thieno)[2,3-b]pyridine-2-carboxylates 1with formamide
were converted to the pyrido[3',2':4,5]furo(thieno)[3,2-d]pyrimidin-7(8)-ones 2.Alkylation of
compound 2 with 2-chloro-N-1,3-thiazol-2-ylacetamide led to the aimed N-1,3-thiazol-2-ylaceta-mides of
pyrido[3',2':4,5]furo(thieno)[3,2-d]pyrimidines 3. Starting from compound 2 the relevant S-alkylated derivatives
of pyrido[3',2':4,5]furo(thieno)[3,2-d]pyrimidines 6 were also synthesized.
Results:
All the compounds showed antibacterial activity to non-resistant strains. Compounds 3a-3m
showed antibacterial activity with MIC/MBC at 0.08-2.31 mg/mL/0.11-3.75 mg/mL .The two most active
compounds, 3j and 6b, appeared to be more active towards MRSA than the reference drugs. Half of the
tested compounds appeared to be equipotent/more potent than ketoconazole and more potent than bifonazole.
The docking analysis provided useful information about the interactions occurring between the tested
compounds and the different enzymes.
Conclusion:
Gram-negative and Gram-positive bacteria and fungi showed different response towards
tested compounds, indicating that different substituents may lead to different modes of action or that the
metabolism of some bacteria/fungi was better able to overcome the effect of the compounds or adapt to it.
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Affiliation(s)
- Samuel N. Sirakanyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Science of RA, 26 Azatutian Ave., Yerevan 0014, Armenia
| | | | - Athina Geronikaki
- Aristotle University of Thessaloniki, School of Pharmacy, Thessaloniki, 54124, Greece
| | - Domenico Spinelli
- Department of Chemistry G. Ciamician, Alma Mater Studiorum- Universita di Bologna, Via F. Selmi 2, Bologna 40126, Italy
| | - Anthi Petrou
- Aristotle University of Thessaloniki, School of Pharmacy, Thessaloniki, 54124, Greece
| | - Elmira K. Hakobyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Science of RA, 26 Azatutian Ave., Yerevan 0014, Armenia
| | - Jasmina Glamoclija
- Mycological Laboratory, Department of Plant Physiology, Institute for Biological Research Sinisa Stankovic, National Institute of Republic of Serbia, University of Belgrade, Serbia
| | - Manija Ivanov
- Mycological Laboratory, Department of Plant Physiology, Institute for Biological Research Sinisa Stankovic, National Institute of Republic of Serbia, University of Belgrade, Serbia
| | - Marina Sokovic
- Mycological Laboratory, Department of Plant Physiology, Institute for Biological Research Sinisa Stankovic, National Institute of Republic of Serbia, University of Belgrade, Serbia
| | - Anush A. Hovakimyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Science of RA, 26 Azatutian Ave., Yerevan 0014, Armenia
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Sirakanyan SN, Hakobyan EK, Hovakimyan AA. Synthesis and Azido-Tetrazole Tautomerism of New Methylsulfanyl Thieno[3,2-d]pyrimidine Derivatives. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2020. [DOI: 10.1134/s1070428019120054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Abstract
This review describes the non-exhaustive scenery of the synthesis of various
biologically interesting pyrimidine annulated five-membered heterocyclic ring systems
that have been appeared in the literature during the last two decades. During this period,
different synthetic routes and various methodologies have been developed for the functionalization
of pyrimidine ring towards the construction of five-membered heterocyclic
rings. The aim of this review is to give an overview of the assorted methodologies that
have been reported about the chemistry of construction of pyrimidines annulated nitrogen,
oxygen and sulphur containing five-membered heterocycles.
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Affiliation(s)
- Pradip Kumar Maji
- Department of Chemistry, Bidhan Chandra College, Asansol, Paschim Bardhaman, 713304, Rishra, West Bangal, India
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Sirakanyan SN, Hakobyan EK, Hovakimyan AA. Synthesis of New Furo[2,3-b]pyridine and Furo[3,2-d]pyrimidine Derivatives. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2019. [DOI: 10.1134/s1070428019090136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Hata T, Hayashi Y, Hasegawa Y, Iwai M, Ishii A, Hasegawa M, Shigeta M, Urabe H. Preparation of Tetrazole-fused π-Conjugated Molecules and Their Fluorescence Behavior. CHEM LETT 2019. [DOI: 10.1246/cl.190150] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Takeshi Hata
- Department of Life Science and Technology, School of Life Science and Technology, Tokyo Institute of Technology, 4259-B-59 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8501, Japan
| | - Yoshiki Hayashi
- Department of Life Science and Technology, School of Life Science and Technology, Tokyo Institute of Technology, 4259-B-59 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8501, Japan
| | - Yuki Hasegawa
- College of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan
| | - Masaaki Iwai
- College of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan
| | - Ayumi Ishii
- College of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan
| | - Miki Hasegawa
- College of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252-5258, Japan
| | - Masayuki Shigeta
- Department of Life Science and Technology, School of Life Science and Technology, Tokyo Institute of Technology, 4259-B-59 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8501, Japan
| | - Hirokazu Urabe
- Department of Life Science and Technology, School of Life Science and Technology, Tokyo Institute of Technology, 4259-B-59 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8501, Japan
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Sirakanyan SN, Spinelli D, Geronikaki A, Kartsev VG, Hakobyan EK, Hovakimyan AA. Synthesis and antimicrobial activity of new derivatives of pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidine and new heterocyclic systems. SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1595659] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Samvel N. Sirakanyan
- Institute of Fine Organic Chemistry of A.L.Mnjoyan, Scientific Technological Center of Organic and Pharmaceutical Chemistry, National Academy of Sciences of Republic of Armenia, Yerevan, Armenia
| | - Domenico Spinelli
- Dipartimento di Chimica G. Ciamician, Alma Mater Studiorum-Università di Bologna, Bologna, Italy
| | - Athina Geronikaki
- School of Pharmacy, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | | | - Elmira K. Hakobyan
- Institute of Fine Organic Chemistry of A.L.Mnjoyan, Scientific Technological Center of Organic and Pharmaceutical Chemistry, National Academy of Sciences of Republic of Armenia, Yerevan, Armenia
| | - Anush A. Hovakimyan
- Institute of Fine Organic Chemistry of A.L.Mnjoyan, Scientific Technological Center of Organic and Pharmaceutical Chemistry, National Academy of Sciences of Republic of Armenia, Yerevan, Armenia
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Sirakanyan SN, Hakobyan EK, Hovakimyan AA. Synthesis of New Sulfur-Substituted Pentacyclic 1,2,4-Triazolopyrimidine Derivatives. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2019. [DOI: 10.1134/s1070428019030059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Sirakanyan SN, Spinelli D, Geronikaki A, Kartsev VG, Hakobyan EK, Hovakimyan AA. Synthesis of New Heterocyclic Systems: Pyrido[3′,2′:4,5]thieno(furo)[2,3-e
][1,2,4]triazolopyrimidines and an Unusual ANRORC Rearrangement in the Fused Pyrimidine Series. ChemistrySelect 2018. [DOI: 10.1002/slct.201802221] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Samvel N. Sirakanyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Science of Republic of Armenia; Institute of Fine Organic Chemistry of A.L.Mnjoyan; Armenia 0014, Yerevan, Ave. Azatutyan 26
| | - Domenico Spinelli
- Dipartimento di Chimica G. Ciamician; Alma Mater Studiorum-Università di Bologna, Via F. Selmi 2; Bologna 40126 Italy
| | - Athina Geronikaki
- Aristotle University of Thessaloniki; School of Pharmacy; Thessaloniki 54124 Greece
| | | | - Elmira K. Hakobyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Science of Republic of Armenia; Institute of Fine Organic Chemistry of A.L.Mnjoyan; Armenia 0014, Yerevan, Ave. Azatutyan 26
| | - Anush A. Hovakimyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Science of Republic of Armenia; Institute of Fine Organic Chemistry of A.L.Mnjoyan; Armenia 0014, Yerevan, Ave. Azatutyan 26
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13
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Sirakanyan SN, Hakobyan EK, Hovakimyan AA. New Synthesis of Pyrano[4,3-d]pyrazolo[3,4-b]pyridines. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2018. [DOI: 10.1134/s1070428018060167] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Scapin E, Salbego PRS, Bender CR, Meyer AR, Pagliari AB, Orlando T, Zimmer GC, Frizzo CP, Bonacorso HG, Zanatta N, Martins MAP. Synthesis, effect of substituents on the regiochemistry and equilibrium studies of tetrazolo[1,5- a]pyrimidine/2-azidopyrimidines. Beilstein J Org Chem 2017; 13:2396-2407. [PMID: 29181120 PMCID: PMC5687014 DOI: 10.3762/bjoc.13.237] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2017] [Accepted: 10/05/2017] [Indexed: 12/02/2022] Open
Abstract
An efficient synthesis methodology for a series of tetrazolo[1,5-a]pyrimidines substituted at the 5- and 7-positions from the cyclocondensation reaction [CCC + NCN] was developed. The NCN corresponds to 5-aminotetrazole and CCC to β-enaminone. Two distinct products were observed in accordance with the β-enaminone substituent. When observed in solution, the compounds can be divided into two groups: (a) precursor compounds with R = CF3 or CCl3, which leads to tetrazolo[1,5-a]pyrimidines in high regioselectivity with R at the 7-position of the heterocyclic ring; and (b) precursor compounds with R = aryl or methyl, which leads to a mixture of compounds, tetrazolo[1,5-a] pyrimidines (R in the 5-position of the ring) and 2-azidopyrimidines (R in the 4-position of the ring), which was attributed to an equilibrium of azide–tetrazole. In the solid state, all compounds were found as 2-azidopyrimidines. The regiochemistry of the reaction and the stability of the products are discussed on the basis of the data obtained by density functional theory (DFT) for energetic and molecular orbital (MO) calculations.
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Affiliation(s)
- Elisandra Scapin
- Laboratório de Química, Universidade Federal do Tocantins, Palmas, TO 77001-090, Brazil
| | - Paulo R S Salbego
- Núcleo de Química de Heterociclos (NUQUIMHE), Department of Chemistry, Federal University of Santa Maria (UFSM), 97105-900, Santa Maria, RS, Brazil
| | - Caroline R Bender
- Núcleo de Química de Heterociclos (NUQUIMHE), Department of Chemistry, Federal University of Santa Maria (UFSM), 97105-900, Santa Maria, RS, Brazil
| | - Alexandre R Meyer
- Núcleo de Química de Heterociclos (NUQUIMHE), Department of Chemistry, Federal University of Santa Maria (UFSM), 97105-900, Santa Maria, RS, Brazil
| | - Anderson B Pagliari
- Núcleo de Química de Heterociclos (NUQUIMHE), Department of Chemistry, Federal University of Santa Maria (UFSM), 97105-900, Santa Maria, RS, Brazil
| | - Tainára Orlando
- Núcleo de Química de Heterociclos (NUQUIMHE), Department of Chemistry, Federal University of Santa Maria (UFSM), 97105-900, Santa Maria, RS, Brazil
| | - Geórgia C Zimmer
- Núcleo de Química de Heterociclos (NUQUIMHE), Department of Chemistry, Federal University of Santa Maria (UFSM), 97105-900, Santa Maria, RS, Brazil
| | - Clarissa P Frizzo
- Núcleo de Química de Heterociclos (NUQUIMHE), Department of Chemistry, Federal University of Santa Maria (UFSM), 97105-900, Santa Maria, RS, Brazil
| | - Helio G Bonacorso
- Núcleo de Química de Heterociclos (NUQUIMHE), Department of Chemistry, Federal University of Santa Maria (UFSM), 97105-900, Santa Maria, RS, Brazil
| | - Nilo Zanatta
- Núcleo de Química de Heterociclos (NUQUIMHE), Department of Chemistry, Federal University of Santa Maria (UFSM), 97105-900, Santa Maria, RS, Brazil
| | - Marcos A P Martins
- Núcleo de Química de Heterociclos (NUQUIMHE), Department of Chemistry, Federal University of Santa Maria (UFSM), 97105-900, Santa Maria, RS, Brazil
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15
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Ghorbani-Vaghei R, Shahriari A, Mahmoodi J, Maghbooli Y. Effective DABCO-catalyzed synthesis of new tetrazolo[1,5-a]pyrimidine analogs. Mol Divers 2017; 21:865-873. [PMID: 28681233 DOI: 10.1007/s11030-017-9760-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Accepted: 05/29/2017] [Indexed: 11/29/2022]
Abstract
In this study, an efficient multicomponent one-pot route is described for the DABCO-catalyzed synthesis of tetrazolo[1,5-a]pyrimidines. This synthesis strategy is based on the reaction of malononitrile and aldehydes with 5-aminotetrazole monohydrate using 1,4-diazabicyclo[2.2.2]octane (DABCO) in i-PrOH under reflux conditions. This protocol is a simple, green, and low-cost technique to prepare new compounds with potential medicinal properties.
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Affiliation(s)
- Ramin Ghorbani-Vaghei
- Department of Organic Chemistry, Faculty of Chemistry, Bu-Ali Sina University, Hamedan, 65174, Iran.
| | - Azadeh Shahriari
- Department of Organic Chemistry, Faculty of Chemistry, Bu-Ali Sina University, Hamedan, 65174, Iran
| | - Jafar Mahmoodi
- Department of Organic Chemistry, Faculty of Chemistry, Bu-Ali Sina University, Hamedan, 65174, Iran
| | - Yaser Maghbooli
- Department of Organic Chemistry, Faculty of Chemistry, Bu-Ali Sina University, Hamedan, 65174, Iran
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16
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Sirakanyan SN, Spinelli D, Geronikaki A, Kartsev VG, Hakobyan EK, Hovakimyan AA. Synthesis and structure of a new heterocyclic system: pyrido[3′,2′:4,5]furo[3,2-d][1,2,4]triazolo[4,3-a]pyrimidin-7(8)-one. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.10.058] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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17
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Sirakanyan SN, Spinelli D, Geronikaki A, Hovakimyan AA. New Methods for the Synthesis of 3-Amino-6,7-Dihydro-5H-Cyclopenta[c]Pyridine-4-Carbonitriles and Cyclopenta[d]Pyrazolo[3,4-b]Pyridines via a Smiles-type Rearrangement. J Heterocycl Chem 2016. [DOI: 10.1002/jhet.2693] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Samvel N. Sirakanyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Science of Republic of Armenia; Institute of Fine Organic Chemistry of A.L. Mnjoyan; Ave. Azatutyan 26 Yerevan 0014 Armenia
| | - Domenico Spinelli
- Dipartimento di Chimica G. Ciamician; Alma Mater Studiorum-Università di Bologna; Via F. Selmi 2 Bologna 40126 Italy
| | - Athina Geronikaki
- Aristotle University of Thessaloniki; School of Pharmacy; Thessaloniki 54124 Greece
| | - Anush A. Hovakimyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Science of Republic of Armenia; Institute of Fine Organic Chemistry of A.L. Mnjoyan; Ave. Azatutyan 26 Yerevan 0014 Armenia
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18
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The azide/tetrazole equilibrium: an investigation in the series of furo- and thieno[2,3-e]tetrazolo[3,2-d]pyrimidine derivatives. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.02.048] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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19
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Sirakanyan SN, Geronikaki A, Spinelli D, Paronikyan RG, Dzhagatspanyan IA, Nazaryan IM, Akopyan AH, Hovakimyan AA. Pyridofuropyrrolo[1,2-a]pyrimidines and pyridofuropyrimido[1,2-a]azepines: new chemical entities (NCE) with anticonvulsive and psychotropic properties. RSC Adv 2016. [DOI: 10.1039/c6ra06507d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A series of pyridofuropyrrolo[1,2-a]pyrimidines4and of pyridofuropyrimido[1,2-a]azepines5having as precursors a some new condensed furo[2,3-b]pyridines3were synthesized and evaluated for their anticonvulsive and psychotropic properties.
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Affiliation(s)
- Samvel N. Sirakanyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Sciences of Republic of Armenia
- Institute of Fine Organic Chemistry of A. L. Mnjoyan
- Yerevan
- Armenia 0014
| | - Athina Geronikaki
- Aristotle University of Thessaloniki
- School of Pharmacy
- Thessaloniki 54124
- Greece
| | - Domenico Spinelli
- Dipartimento di Chimica G. Ciamician
- Alma Mater Studiorum-Università di Bologna
- Bologna 40126
- Italy
| | - Ruzanna G. Paronikyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Sciences of Republic of Armenia
- Institute of Fine Organic Chemistry of A. L. Mnjoyan
- Yerevan
- Armenia 0014
| | - Irina A. Dzhagatspanyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Sciences of Republic of Armenia
- Institute of Fine Organic Chemistry of A. L. Mnjoyan
- Yerevan
- Armenia 0014
| | - Ivetta M. Nazaryan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Sciences of Republic of Armenia
- Institute of Fine Organic Chemistry of A. L. Mnjoyan
- Yerevan
- Armenia 0014
| | - Asmik H. Akopyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Sciences of Republic of Armenia
- Institute of Fine Organic Chemistry of A. L. Mnjoyan
- Yerevan
- Armenia 0014
| | - Anush A. Hovakimyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Sciences of Republic of Armenia
- Institute of Fine Organic Chemistry of A. L. Mnjoyan
- Yerevan
- Armenia 0014
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20
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Sirakanyan SN, Geronikaki A, Spinelli D, Paronikyan RG, Dzhagatspanyan IA, Nazaryan IM, Akopyan AH, Hovakimyan AA. Pyridofuropyrrolo[1,2-a]pyrimidines and pyridofuropyrimido[1,2-a]azepines: new chemical entities (NCE) with anticonvulsive and psychotropic properties. RSC Adv 2016. [DOI: 10.1039/c6ra02581a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A series of pyridofuropyrrolo[1,2-a]pyrimidines4and pyridofuropyrimido[1,2-a]azepines5, with new condensed furo[2,3-b]pyridines3as precursors, were synthesized and evaluated for their anticonvulsive and psychotropic properties.
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Affiliation(s)
- Samvel N. Sirakanyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Sciences of Republic of Armenia
- Institute of Fine Organic Chemistry of A. L. Mnjoyan
- Yerevan
- Armenia 0014
| | - Athina Geronikaki
- Aristotle University of Thessaloniki
- School of Pharmacy
- Thessaloniki 54124
- Greece
| | - Domenico Spinelli
- Dipartimento di Chimica G. Ciamician
- Alma Mater Studiorum-Università di Bologna
- Bologna 40126
- Italy
| | - Ruzanna G. Paronikyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Sciences of Republic of Armenia
- Institute of Fine Organic Chemistry of A. L. Mnjoyan
- Yerevan
- Armenia 0014
| | - Irina A. Dzhagatspanyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Sciences of Republic of Armenia
- Institute of Fine Organic Chemistry of A. L. Mnjoyan
- Yerevan
- Armenia 0014
| | - Ivetta M. Nazaryan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Sciences of Republic of Armenia
- Institute of Fine Organic Chemistry of A. L. Mnjoyan
- Yerevan
- Armenia 0014
| | - Asmik H. Akopyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Sciences of Republic of Armenia
- Institute of Fine Organic Chemistry of A. L. Mnjoyan
- Yerevan
- Armenia 0014
| | - Anush A. Hovakimyan
- Scientific Technological Center of Organic and Pharmaceutical Chemistry of National Academy of Sciences of Republic of Armenia
- Institute of Fine Organic Chemistry of A. L. Mnjoyan
- Yerevan
- Armenia 0014
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21
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On the reactivity of pyrido[3′,2′:4,5]furo(thieno)[3,2-d]pyrimidin-7(8)-ones with some alkyl mono- and di-halides: synthesis of new heterocyclic systems containing thiazolo[3,2-a]pyrimidine and pyrimido[2,1-b]thiazine moiety. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.07.069] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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22
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Sirakanyan SN, Hovakimyan AA, Noravyan AS. Synthesis, transformations and biological properties of furo[2,3-b]pyridines. RUSSIAN CHEMICAL REVIEWS 2015. [DOI: 10.1070/rcr4447] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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23
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Sirakanyan SN, Spinelli D, Geronikaki A, Hovakimyan AA, Noravyan AS. On the reaction of 2-[(4-cyano-5,6,7,8-tetrahydroisoquinolin-3-yl)oxy]acetamides with bases: 1-amino-6,7,8,9-tetrahydrofuro[2,3-c]isoquinoline-2-carboxamides and 3-amino-4-cyano-5,6,7,8-tetrahydroisoquinolines via a Smiles-type rearrangement. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.03.114] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Sirakanyan SN, Spinelli D, Geronikaki A, Hovakimyan AA, Noravyan AS. New heterocyclic systems derived from pyridine: new substrates for the investigation of the azide/tetrazole equilibrium. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.09.047] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Sarvary A, Maleki A. A review of syntheses of 1,5-disubstituted tetrazole derivatives. Mol Divers 2014; 19:189-212. [PMID: 25273563 DOI: 10.1007/s11030-014-9553-3] [Citation(s) in RCA: 117] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Accepted: 09/12/2014] [Indexed: 11/26/2022]
Abstract
This report provides a brief overview of the various representative literature procedures for the synthesis of 1,5-disubstituted tetrazoles (1,5-DSTs) and fused 1,5-disubstituted tetrazoles with more than 120 references. Most of the published methods for the synthesis of 1,5-DSTs include the use of nitriles, amides, thioamides, imidoyl chlorides, heterocumulenes, isocyanates, isothiocyanates, carbodiimides, ketenimines, ketones, amines, and alkenes as the starting materials. The transformation of 1- and 5-substituted tetrazoles into 1,5-DSTs is also covered in this report.
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Affiliation(s)
- Afshin Sarvary
- Department of Science, Babol University of Technology, Babol, Iran
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On the reactivity of 4-cyano-1,3-dichloro-7-methyl-5,6,7,8-tetrahydro-2,7-naphthyridine with several amines in different experimental conditions: monosubstitution, disubstitution, and a new unexpected rearrangement. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.05.070] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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