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Wippert N, Nieger M, Herlan C, Jung N, Bräse S. Synthesis of new pyrazolo[1,2,3]triazines by cyclative cleavage of pyrazolyltriazenes. Beilstein J Org Chem 2021; 17:2773-2780. [PMID: 34900007 PMCID: PMC8630434 DOI: 10.3762/bjoc.17.187] [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: 07/11/2021] [Accepted: 10/05/2021] [Indexed: 11/23/2022] Open
Abstract
We describe the synthesis of so far synthetically not accessible 3,6-substituted-4,6-dihydro-3H-pyrazolo[3,4-d][1,2,3]triazines as nitrogen-rich heterocycles. The target compounds were obtained in five steps, including an amidation and a cyclative cleavage reaction as key reaction steps. The introduction of two side chains allowed a variation of the pyrazolo[3,4-d][1,2,3]triazine core with commercially available building blocks, enabling the extension of the protocol to gain other derivatives straightforwardly. Attempts to synthesize 3,7-substituted-4,7-dihydro-3H-pyrazolo[3,4-d][1,2,3]triazines, the regioisomers of the successfully gained 3,6-substituted 4,6-dihydro-3H-pyrazolo[3,4-d][1,2,3]triazines, were not successful under similar conditions due to the higher stability of the triazene functionality in the regioisomeric precursors and thus, the failure of the removal of the protective group.
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Affiliation(s)
- Nicolai Wippert
- Institute of Biological and Chemical Systems - Functional Molecular Systems (IBCS-FMS), Karlsruhe Institute of Technology, Campus North, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Martin Nieger
- Department of Chemistry, University of Helsinki, P.O. Box 55 (A. I. Virtasen aukio 1), 00014 University of Helsinki, Finland
| | - Claudine Herlan
- Institute of Biological and Chemical Systems - Functional Molecular Systems (IBCS-FMS), Karlsruhe Institute of Technology, Campus North, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Nicole Jung
- Institute of Biological and Chemical Systems - Functional Molecular Systems (IBCS-FMS), Karlsruhe Institute of Technology, Campus North, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.,Institute of Organic Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
| | - Stefan Bräse
- Institute of Biological and Chemical Systems - Functional Molecular Systems (IBCS-FMS), Karlsruhe Institute of Technology, Campus North, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.,Institute of Organic Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
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Colomer JP, Sciú ML, Ramirez CL, Soria-Castro SM, Vera DMA, Moyano EL. Thermal Ring-Opening of Pyrazolo[3,4-d
][1,2,3]triazin-4-ones: An Experimental and Theoretical Study. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701538] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Juan P. Colomer
- INFIQC; Department of Organic Chemistry; National University of Córdoba; Córdoba Argentina
| | - María L. Sciú
- INFIQC; Department of Organic Chemistry; National University of Córdoba; Córdoba Argentina
| | - Cristina L. Ramirez
- QUIAMM-INBIOTEC; Dept. of Chemistry; School of Exact and Natural Sciences; National University of Mar del Plata; Mar del Plata Argentina
| | - Silvia M. Soria-Castro
- INFIQC; Department of Organic Chemistry; National University of Córdoba; Córdoba Argentina
| | - D. Mariano A. Vera
- QUIAMM-INBIOTEC; Dept. of Chemistry; School of Exact and Natural Sciences; National University of Mar del Plata; Mar del Plata Argentina
| | - Elizabeth L. Moyano
- INFIQC; Department of Organic Chemistry; National University of Córdoba; Córdoba Argentina
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Synthesis and Antioxidant Activity of Some New Heterocycles Incorporating the Pyrazolo-[3,4-D]Pyrimidin-4-One Moiety. Chem Heterocycl Compd (N Y) 2015. [DOI: 10.1007/s10593-015-1640-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Li M, Zhao BX. Progress of the synthesis of condensed pyrazole derivatives (from 2010 to mid-2013). Eur J Med Chem 2014; 85:311-40. [PMID: 25104650 DOI: 10.1016/j.ejmech.2014.07.102] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Revised: 07/25/2014] [Accepted: 07/26/2014] [Indexed: 01/08/2023]
Abstract
Condensed pyrazole derivatives are important heterocyclic compounds due to their excellent biological activities and have been widely applied in pharmaceutical and agromedical fields. In recent years, numerous condensed pyrazole derivatives have been synthesized and advanced to clinic studies with various biological activities. In this review, we summarized the reported synthesis methods of condensed pyrazole derivatives from 2010 until now. All compounds are divided into three parts according to the rings connected to pyrazole-ring, i.e. [5, 5], [5,F 6], and [5, 7]-condensed pyrazole derivatives. The biological activities and applications in pharmaceutical fields are briefly introduced to offer an orientation for the design and synthesis of condensed pyrazole derivatives with good biological activities.
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Affiliation(s)
- Meng Li
- Institute of Organic Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, PR China
| | - Bao-Xiang Zhao
- Institute of Organic Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, PR China.
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Gurenko AO, Khutova BM, Klyuchko SV, Vasilenko AN, Brovarets VS. Synthesis of Novel Pyrazolo[3,4-d][1,2,3]Triazines. Chem Heterocycl Compd (N Y) 2014. [DOI: 10.1007/s10593-014-1503-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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El-Mekabaty A. Utility of 5-Amino-1-phenyl-1H-pyrazole-4-carboxamide in Heterocyclic Synthesis. SYNTHETIC COMMUN 2014. [DOI: 10.1080/00397911.2013.831905] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Ahmed El-Mekabaty
- a Chemistry Department, Faculty of Science , Mansoura University , Mansoura , Egypt
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Khutova BM, Klyuchko SV, Gurenko AO, Vasilenko AN, Balya AG, Rusanov EB, Brovarets VS. Conversions of 7-aryl-7H-pyrazolo[3,4-d]-[1,2,3]triazin-4-ols by the action of phosphorus pentoxide, pentasulfide, and oxychloride. Chem Heterocycl Compd (N Y) 2012. [DOI: 10.1007/s10593-012-1128-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Colomer JP, Moyano EL. New application of heterocyclic diazonium salts. Synthesis of pyrazolo[3,4-d][1,2,3]triazin-4-ones and imidazo[4,5-d][1,2,3]triazin-4-ones. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.01.040] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Moyano EL, Colomer JP, Yranzo GI. New Application of Heterocyclic Diazonium Salts: Synthesis of New Pyrazolo[3,4‐d][1,2,3]triazin‐4‐ones. European J Org Chem 2008. [DOI: 10.1002/ejoc.200701109] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Shamroukh AH, Rashad AE, Sayed HH. Synthesis of Some Pyrazolo[3, 4]pyrimidine Derivatives for Biological Evaluation. PHOSPHORUS SULFUR 2005. [DOI: 10.1080/104265090921074] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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García-Ruiz C, García MA, Marina ML. Separation of a group of N-phenylpyrazole derivatives by micellar electrokinetic chromatography: application to the determination of solute-micelle association constants and estimation of the hydrophobicity. Electrophoresis 2000; 21:2424-31. [PMID: 10939455 DOI: 10.1002/1522-2683(20000701)21:12<2424::aid-elps2424>3.0.co;2-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Micellar electrokinetic chromatography (MEKC) was applied to the separation of a group of N-phenylpyrazole derivatives. Sodium dodecyl sulfate (SDS) as micellar system and 2-(N-cyclohexylamino)ethanesulfonic acid (CHES) as separation buffer (pH 10) were employed in the absence and presence of different percentages of medium chain alcohols (n-propanol or n-butanol). The separation of multicomponent mixtures of the solutes studied enabled the rapid determination of their retention factors which, in turn, allowed the study of the separation selectivity of compounds and the determination of their solute-micelle association constants (from the linear variation of the retention factors as a function of the total surfactant concentration in the separation buffer). Separation selectivity was studied according to the elution range and number of solutes separated in all the electrolyte solutions employed (45 micellar phases). The effect of the buffer concentration (0.05, 0.08 and 0.10 M), the alcohol nature (n-propanol or n-butanol) and the alcohol percentage (1, 3 or 5%) of the values obtained for the solute-micelle association constants was also studied. The best separation (12 solutes) was performed when a 0.08 M CHES buffer, pH 10, 0.02 M SDS modified by 5% n-butanol was used. The possibilities of using MEKC for evaluating the hydrophobicity of compounds was investigated through the study of the correlation between the logarithm of the retention factors of N-phenylpyrazole derivatives and their logarithm of the octanol-water distribution coefficients estimated by high performance liquid chromatography (HPLC).
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Affiliation(s)
- C García-Ruiz
- Departamento de Química Analítica, Facultad de Química, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
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Krawczyk S, Migawa MT, Drach JC, Townsend LB. Synthesis of 4-substituted imidazo[4,5-d][1,2,3]triazine (2-azapurine)nucleosides. NUCLEOSIDES, NUCLEOTIDES & NUCLEIC ACIDS 2000; 19:39-68. [PMID: 10772702 DOI: 10.1080/15257770008032996] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Several methods for functionalization of the 4-position of imidazo[4,5-d][1,2,3]triazin-4-one were investigated. These investigations were successful and led to the preparation of 4-amino, 4-triazol-1-yl, 4-methoxy, 4-methylthio, 4-methylamino, 4-thio, 4-nitrobenzyl, and 4-unsubstituted 9-(beta-D-ribofuranosyl)-imidazo-[4,5-d][1,2,3]triazine (2-azapurine ribosides). The 4-unsubstituted compound (19) was slightly active against HCMV in plaque and yield reduction experiments and was not cytotoxic at 100 microM. The methylamino (15), hydrazino (16), and p-nitrobenzylthio (20) were inactive against HCMV but slightly cytotoxic. The thiomethyl-substituted analog (21) was the most active with activity comparable to ganciclovir but with greater cytotoxicity. We conclude that even though none of the tested compounds had antiviral activity superior to ganciclovir, the new synthetic methods will provide a route to more interesting compounds.
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Affiliation(s)
- S Krawczyk
- Department of Chemistry, College of Literature, Science and the Arts, University of Michigan, Ann Arbor 48109-1065, USA
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