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Tang Z, Xu S, Yin N, Yang Y, Deng Q, Shen J, Zhang X, Wang T, He H, Lin X, Zhou Y, Zou Z. Reaction Site Designation by Intramolecular Electric Field in Tröger's-Base-Derived Conjugated Microporous Polymer for Near-Unity Selectivity of CO 2 Photoconversion. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2210693. [PMID: 36760097 DOI: 10.1002/adma.202210693] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 01/22/2023] [Indexed: 05/17/2023]
Abstract
To facilitate solar-driven overall CO2 and H2 O convsersion into fuels and O2 , a series of covalent microporous polymers derived from Tröger's base are synthesized featuring flexural backbone and unusual charge-transfer properties. The incorporation of rigid structural twist Tröger's base unit grants the polymers enhanced microporosity and CO2 adsorption/activation capacity. Density function theory calculations and photo-electrochemical analyses reveal that an electric dipole moment (from negative to positive) directed to the Tröger's base unit is formed across two obliquely opposed molecular fragments and induces an intramolecular electric field. The Tröger's base unit located at folding point becomes an electron trap to attract photogenerated electrons in the molecular network, which brings about suppression of carrier recombination and designates the reaction site in synergy with the conjugated network. In response to the discrepancy in reaction pathways across the reaction sites, the product allocation in the catalytic reaction is thereby regulated. Optimally, CMP-nTB achieves the highest photocatalytic CO production of 163.53 µmol g-1 h-1 with approximately unity selectivity, along with H2 O oxidation to O2 in the absence of any photosensitizer or co-catalyst. This work provides new insight for developing specialized artificial organic photocatalysts.
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Affiliation(s)
- Zheng Tang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Shengyu Xu
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Nan Yin
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Yong Yang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Qinghua Deng
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Jinyou Shen
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Xiaoyue Zhang
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Tianyu Wang
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Huichao He
- Institute of Environmental Energy Materials and Intelligent Devices, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing, 401331, P. R. China
| | - Xiangyang Lin
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Yong Zhou
- Eco-Materials and Renewable Energy Research Center (ERERC), School of Physics, Nanjing University, Nanjing, 210093, P. R. China
- School of Chemical and Environmental Engnieering, Anhui Polytechnic University, Wuhu, 241002, P. R. China
| | - Zhigang Zou
- Eco-Materials and Renewable Energy Research Center (ERERC), School of Physics, Nanjing University, Nanjing, 210093, P. R. China
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Liu RX, Liang YN, Ren XX, Wu QQ, Huang C, Cao SN, Wan Y, Zhou SL, Yuan R, Wu H. Synthesis and Antibacterial Activity of Spiro[4 H-pyran-3,3'-oxindoles] Catalyzed by Tröger's Base Derivative. Curr Org Synth 2023; 20:870-879. [PMID: 35702794 DOI: 10.2174/1570179419666220614142611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 04/30/2022] [Accepted: 05/13/2022] [Indexed: 11/22/2022]
Abstract
OBJECTIVE Two classes of spiro[4H-pyran-3,3'-oxindole] derivatives were prepared via the one pot reaction of chain diketones (1-phenyl-1,3-butanedione or dibenzoyl methane), substituted isatins and malononitrile successfully catalyzed by a Tröger's base derivative 1b (5,12-dimethyl-3,10-diphenyl-bis-1H-pyrazol[b,f][4,5]-1,5-diazadicyclo[3.3.1]-2,6-octadiene). The antibacterial activity of products against three wild-type bacteria (B. subtilis, S. aureus, and E. coli) and two resistant strains (Methicillin-resistant S. aureus (18H8) and E. coli carrying the BlaNDM-1 gene (18H5)) was evaluated using the minimum inhibitory concentration (MIC).. METHODS 1-Phenyl-1,3-butanedione 2 or dibenzoylmethane 2' (0.42 mmol), substituted isatin 3 (0.4 mmol), malononitrile 4 (0.8 mmol), Tröger's base derivative 1b (0.08 mmol), and 10 mL of acetonitrile were added to a 50 mL round bottom flask and refluxed. After the completion (TLC monitoring), water (10 mL) was added to the reaction mixture; pH = 7 was adjusted with saturated NaHCO3 (aq.), and the mixture was extracted with CH2Cl2 (50 mL × 3). Organic layers were combined and dried with anhydrous Na2SO4; the solvent was removed under vacuum, and the residue was purified by column chromatography (VDCM: VMeOH = 80: 1) to afford product 5. The antibacterial activity was tested by the MTT method. RESULTS Seventeen spiro[4H-pyran-3,3'-oxindole] derivatives were synthesized through the reaction of chain diketones (1-phenyl-1,3-butanedione or dibenzoyl methane), substituted isatins, and malononitrile in one-pot in medium to high yields. Four compounds showed antibacterial activity, and two of them showed the same activity as the positive control Ceftazidime on S. aureus (MIC = 12.5 μg/mL). CONCLUSION Two classes of spiro[4H-pyran-3,3'-oxindole] derivatives were prepared, and their antibacterial activity was evaluated. Tröger's base derivative 1b (5,12-dimethyl-3,10-diphenyl-bis-1H-pyrazol[b,f][4,5]- 1,5-diazadicyclo[3,3,1]-2,6-octadiene) was used as an efficient organocatalyst for the reaction of low reactive chain diketones (1-phenyl-1,3-butanedione or dibenzoyl methane), substituted isatins, and malononitrile in one-pot successfully and effectively by providing multiple active sites and alkaline environment. By the theoretical calculation, we explained the possible reaction sequence and mechanism. Due to the superiority and high efficiency of the TB framework as an organocatalyst, the reaction showed many advantages, including mild reaction conditions, low catalyst loading, and a wide substrate range. It expanded the application of Tröger's base to the multicomponent reaction in organocatalysis. Some products were screened due to their high antibacterial activity in vitro, showing their potential in new antibacterial drug development.
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Affiliation(s)
- Run-Xin Liu
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu, 221116, P.R. China
| | - Yan-Ni Liang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu, 221116, P.R. China
| | - Xuan-Xuan Ren
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu, 221116, P.R. China
| | - Qian-Qian Wu
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu, 221116, P.R. China
| | - Can Huang
- Jiangsu Province Engineering Research Center of Cardiovascular Drugs Targeting Endothelial Cell, The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou, 221116, P.R. China
| | - Shi-Nian Cao
- Jiangsu Province Engineering Research Center of Cardiovascular Drugs Targeting Endothelial Cell, The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou, 221116, P.R. China
| | - Yu Wan
- Jiangsu Province Engineering Research Center of Cardiovascular Drugs Targeting Endothelial Cell, The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou, 221116, P.R. China
| | - Sheng-Liang Zhou
- Jiangsu Province Engineering Research Center of Cardiovascular Drugs Targeting Endothelial Cell, The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou, 221116, P.R. China
| | - Rui Yuan
- Jiangsu Province Engineering Research Center of Cardiovascular Drugs Targeting Endothelial Cell, The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou, 221116, P.R. China
| | - Hui Wu
- Jiangsu Province Engineering Research Center of Cardiovascular Drugs Targeting Endothelial Cell, The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou, 221116, P.R. China
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Wang G, Sun S, Guo H. Current status of carbazole hybrids as anticancer agents. Eur J Med Chem 2021; 229:113999. [PMID: 34838335 DOI: 10.1016/j.ejmech.2021.113999] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 11/07/2021] [Accepted: 11/13/2021] [Indexed: 12/15/2022]
Abstract
The drug resistance and low specificity of current available chemotherapeutics to cancer cells are the main reasons responsible for the failure of cancer chemotherapy and remain dramatic challenges for cancer therapy, creating an urgent need to develop novel anticancer agents. Carbazole nucleus, widely distributed in nature, is a predominant feature of a vast array of biologically active compounds. Carbazole derivatives exhibited potential antiproliferative activity against different cancer cell lines by diverse mechanisms, inclusive of arrest cell cycle and induce apoptosis, and several anticancer agents are carbazole-based compounds. Thus, carbazole derivatives represent a fertile source for discovery of novel anticancer therapeutic agents. Over the past several years, a variety of carbazole hybrids have been developed as potential anticancer agents. The present review focuses on the recent progress, from 2016 until now, in knowledge on anticancer properties, structure-activity relationships and mechanisms of action of carbazole hybrids to provide a basis for development of relevant therapeutic agents.
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Affiliation(s)
- Gangqiang Wang
- Hubei Key Laboratory of Radiation Chemistry and Functional Materials, Non-power Nuclear Technology Collaborative Innovation Center, School of Nuclear Technology and Chemistry & Biology, Hubei University of Science and Technology, Xianning, 437100, PR China; School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, 430074, PR China.
| | - Shaofa Sun
- Hubei Key Laboratory of Radiation Chemistry and Functional Materials, Non-power Nuclear Technology Collaborative Innovation Center, School of Nuclear Technology and Chemistry & Biology, Hubei University of Science and Technology, Xianning, 437100, PR China
| | - Hua Guo
- School of Chemistry and Life Science, Anshan Normal University, Anshan, 114005, Liaoning, PR China
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Qian C, Chen Y, Zhao Q, Cheng M, Lin C, Jiang J, Wang L. Circularly polarized luminescent systems fabricated by Tröger's base derivatives through two different strategies. Beilstein J Org Chem 2021; 17:52-57. [PMID: 33488831 PMCID: PMC7801797 DOI: 10.3762/bjoc.17.6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 12/09/2020] [Indexed: 12/16/2022] Open
Abstract
The Tröger's base derivative rac-TBPP was synthesized and separated into two enantiomers R 2N -TBPP and S 2N -TBPP by chiral column chromatography. These compounds show a strong circularly polarized luminescence with g lum values of +0.0021, and -0.0025, respectively. The second way to fabricate the rac-TBPP-based CPL-active material is to co-gel the fluorescent rac-TBPP with a chiral ᴅ-glutamic acid gelator DGG by co-assembly strategy. At the molar ratio of rac-TBPP/DGG = 1:80, the g lum value of the co-gel was about three times higher than the g lum values of R 2N -TBPP and S 2N -TBPP enantiomers. Interestingly, the CPL handedness of the rac-TBPP/DGG co-gel could be adjusted effectively by changing their stoichiometric ratios.
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Affiliation(s)
- Cheng Qian
- Key Laboratory of Mesoscopic Chemistry of MOE, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Yuan Chen
- Key Laboratory of Mesoscopic Chemistry of MOE, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Qian Zhao
- Key Laboratory of Mesoscopic Chemistry of MOE, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Ming Cheng
- Key Laboratory of Mesoscopic Chemistry of MOE, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Chen Lin
- Key Laboratory of Mesoscopic Chemistry of MOE, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Juli Jiang
- Key Laboratory of Mesoscopic Chemistry of MOE, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Leyong Wang
- Key Laboratory of Mesoscopic Chemistry of MOE, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
- Advanced Materials Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250014, China
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Trupp L, Bruttomesso AC, Vardé M, Eliseeva SV, Ramírez JA, Petoud S, Barja BC. Innovative Multipodal Ligands Derived from Tröger's Bases for the Sensitization of Lanthanide(III) Luminescence. Chemistry 2020; 26:16900-16909. [DOI: 10.1002/chem.202003524] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 09/16/2020] [Indexed: 11/07/2022]
Affiliation(s)
- Leandro Trupp
- Departamento de Química Inorgánica, Analítica y Química Física Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires Int. Güiraldes 2160, Ciudad Universitaria Buenos Aires 1428 Argentina
- Instituto de Química Física de los Materiales, Medio Ambiente y Energía, (INQUIMAE) CONICET—Universidad de Buenos Aires Int. Güiraldes 2160, Ciudad Universitaria Buenos Aires 1428 Argentina
- Departamento de Química Orgánica Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires Int. Güiraldes 2160, Ciudad Universitaria Buenos Aires 1428 Argentina
- Unidad de Microanálisis y Métodos Físicos Aplicados a Química Orgánica (UMYMFOR) CONICET—Universidad de Buenos Aires Int. Güiraldes 2160, Ciudad Universitaria Buenos Aires 1428 Argentina
- Centre de Biophysique Moléculaire Centre National de la Recherche Scientifique (CNRS), UPR 4301 45071 Orléans Cedex 2 France
| | - Andrea C. Bruttomesso
- Departamento de Química Orgánica Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires Int. Güiraldes 2160, Ciudad Universitaria Buenos Aires 1428 Argentina
- Unidad de Microanálisis y Métodos Físicos Aplicados a Química Orgánica (UMYMFOR) CONICET—Universidad de Buenos Aires Int. Güiraldes 2160, Ciudad Universitaria Buenos Aires 1428 Argentina
| | - Mariana Vardé
- Departamento de Química Orgánica Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires Int. Güiraldes 2160, Ciudad Universitaria Buenos Aires 1428 Argentina
- Unidad de Microanálisis y Métodos Físicos Aplicados a Química Orgánica (UMYMFOR) CONICET—Universidad de Buenos Aires Int. Güiraldes 2160, Ciudad Universitaria Buenos Aires 1428 Argentina
| | - Svetlana V. Eliseeva
- Centre de Biophysique Moléculaire Centre National de la Recherche Scientifique (CNRS), UPR 4301 45071 Orléans Cedex 2 France
| | - Javier A. Ramírez
- Departamento de Química Orgánica Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires Int. Güiraldes 2160, Ciudad Universitaria Buenos Aires 1428 Argentina
- Unidad de Microanálisis y Métodos Físicos Aplicados a Química Orgánica (UMYMFOR) CONICET—Universidad de Buenos Aires Int. Güiraldes 2160, Ciudad Universitaria Buenos Aires 1428 Argentina
| | - Stéphane Petoud
- Centre de Biophysique Moléculaire Centre National de la Recherche Scientifique (CNRS), UPR 4301 45071 Orléans Cedex 2 France
| | - Beatriz C. Barja
- Departamento de Química Inorgánica, Analítica y Química Física Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires Int. Güiraldes 2160, Ciudad Universitaria Buenos Aires 1428 Argentina
- Instituto de Química Física de los Materiales, Medio Ambiente y Energía, (INQUIMAE) CONICET—Universidad de Buenos Aires Int. Güiraldes 2160, Ciudad Universitaria Buenos Aires 1428 Argentina
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Nakaike Y, Yoshida Y, Yokoyama S, Ito A, Nishiwaki N. Synthesis and intramolecular ring transformation of N,N'-dialkylated 2,6,9-triazabicyclo[3.3.1]nonadienes. Org Biomol Chem 2020; 18:9109-9116. [PMID: 33150921 DOI: 10.1039/d0ob01950j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first and facile synthesis of N,N'-dialkylated 2,6,9-triazabicyclo[3.3.1]nonadienes was achieved by the [4 + 4] self-condensation of β-formyl-β-nitroenamine in the presence of ammonium acetate. The 2,6- and 2,9-dialkylated products were found to be interconvertible when dissolved in a solvent. This isomerization proceeds through intramolecular ring transformation via a common intermediate under equilibrium.
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Affiliation(s)
- Yumi Nakaike
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Yoshidahonmachi, Sakyo-ku, Kyoto 606-8501, Japan
| | - Yusuke Yoshida
- School of Environmental Science and Engineering, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502, Japan.
| | - Soichi Yokoyama
- School of Environmental Science and Engineering, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502, Japan. and Research Center for Molecular Design, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502, Japan and The Institute of Scientific and Industrial Research, Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Akitaka Ito
- School of Environmental Science and Engineering, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502, Japan. and Research Center for Molecular Design, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502, Japan
| | - Nagatoshi Nishiwaki
- School of Environmental Science and Engineering, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502, Japan. and Research Center for Molecular Design, Kochi University of Technology, Tosayamada, Kami, Kochi 782-8502, Japan
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Four-component 1,4-addition Ugi reaction catalyzed by the Schiff base derived from Tröger's base and BINOL. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152388] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Ugi–Smiles and Ullmann reactions catalyzed by Schiff base derived from Tröger’s base and BINOL. RESEARCH ON CHEMICAL INTERMEDIATES 2020. [DOI: 10.1007/s11164-020-04091-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Trupp L, Bruttomesso AC, Barja BC. Simple dissymmetrical and asymmetrical Tröger's bases: photophysical and structural characterization. NEW J CHEM 2020. [DOI: 10.1039/d0nj01988g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Four TBs were studied by NMR, IR and optical spectroscopy, observing solvatochromic effects and communication between the asymmetric molecule's extremes.
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Affiliation(s)
- Leandro Trupp
- Departamento de Química Inorgánica
- Analítica y Química Física
- Facultad de Ciencias Exactas y Naturales
- Universidad de Buenos Aires
- Buenos Aires
| | - Andrea C. Bruttomesso
- Departamento de Química Orgánica
- Facultad de Ciencias Exactas y Naturales
- Universidad de Buenos Aires
- Buenos Aires
- Argentina
| | - Beatriz C. Barja
- Departamento de Química Inorgánica
- Analítica y Química Física
- Facultad de Ciencias Exactas y Naturales
- Universidad de Buenos Aires
- Buenos Aires
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Lanza PA, Dusso D, Ramirez CL, Parise AR, Chesta CA, Moyano EL, Vera DMA. Uncovering the Mechanism Leading to the Synthesis of Symmetric and Asymmetric Tröger′s Bases. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Priscila A. Lanza
- QUIAMM-INBIOTEC. Department of Chemistry; Facultad de Ciencias Exactas y Naturales; Universidad Nacional de Mar del Plata; Mar del Plata Argentina
| | - Diego Dusso
- INFIQC; Department of Organic Chemistry; Facultad de Ciencias Químicas; Universidad Nacional de Córdoba; Córdoba Argentina
| | - Cristina L. Ramirez
- Department of Chemistry; Facultad de Ciencias Exactas y Naturales; Universidad Nacional de Mar del Plata; Mar del Plata Argentina
| | - Alejandro R. Parise
- QUIAMM-INBIOTEC. Department of Chemistry; Facultad de Ciencias Exactas y Naturales; Universidad Nacional de Mar del Plata; Mar del Plata Argentina
| | - Carlos A. Chesta
- IITEMA; Department of Chemistry; Facultad de Ciencias Físicoquimicas y Naturales; Universidad Nacional de Rio Cuarto; Las Higueras Argentina
| | - E. Laura Moyano
- INFIQC; Department of Organic Chemistry; Facultad de Ciencias Químicas; Universidad Nacional de Córdoba; Córdoba Argentina
| | - D. Mariano A. Vera
- QUIAMM-INBIOTEC. Department of Chemistry; Facultad de Ciencias Exactas y Naturales; Universidad Nacional de Mar del Plata; Mar del Plata Argentina
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Dusso D, Ramirez C, Parise A, Lanza P, Vera DM, Chesta C, Moyano EL, Akhmedov NG. Synthesis of new cyano-substituted analogues of Tröger's bases from bromo-derivatives. A stereochemical dependence of long-range ( n J HH , n = 4, 5, and 6) proton-proton and proton-carbon ( n J CH , n = 1, 2, 3, 4, and 5) coupling constants of these compounds. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2019; 57:423-454. [PMID: 30937941 DOI: 10.1002/mrc.4872] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 03/21/2019] [Accepted: 03/25/2019] [Indexed: 06/09/2023]
Abstract
A free-catalyst microwave-assisted cyanation of brominated Tröger's base derivatives (2a-f) is reported. The procedure is simple, efficient, and clean affording the nitrile compounds (3a-e, I) in very good yields. Complete assignment of 1 H and 13 C chemical shifts of 2a-f, I and 3a-d, I was achieved using gradient selected 1D nuclear magnetic resonance (NMR) techniques (1D zTOCSY, PSYCHE, DPFGSE NOE, and DEPT), homonuclear 2D NMR techniques (gCOSY and zTOCSY), and heteronuclear 2D NMR techniques (gHSQCAD/or pure-shift gHSQCAD, gHMBCAD, bsHSQCNOESY, and gHSQCAD-TOCSY) with adiabatic pulses. Determination of the long-range proton-proton coupling constants n JHH (n = 4, 5, 6) was accomplished by simultaneous irradiation of two protons at appropriate power levels. In turn, determined coupling constants were tested by an iterative simulation program by calculating the 1 H NMR spectrum and comparing it to the experimental spectrum. The excitation-sculptured indirect-detection experiment (EXSIDE) and 1 H-15 N CIGARAD-HMBC (constant time inverse-detection gradient accordion rescaled heteronuclear multiple bond correlation) were applied for determination of long-range carbon-proton coupling constants n JCH (n = 2, 3, and 4) and for assignment of 15 N chemical shift at natural abundance, respectively. DFT/B3LYP optimization studies were performed in order to determine the geometry of 2c using 6-31G(d,p), 6-311G(d,p), and 6-311 + G(d,p) basis sets. For calculation of 1 H and 13 C chemical shifts, n JHH (n = 2, 3, 4, 5, and 6), and n JCH (n = 1, 2, 3, and 4) coupling constants, the GIAO method was employed at the B3LYP/6-31G(d,p), B3LYP/6-31+G(d,p), B3LYP/6-311+G(d,p), B3LYP/6-311++G(2d,2p), B3LYP/cc-pVTZ), and B3LYP/aug-cc-pVTZ) levels of theory. For the first time, a stereochemical dependence magnitude of the long-range n JHH (n = 4, 5, and 6) and n JCH (n = 1, 2, 3, 4, and 5) have been found in bromo-substituted analogues of Tröger's bases.
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Affiliation(s)
- Diego Dusso
- INFIQC-Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, Argentina
- Facultad de Ciencias Exactas Fisicoquímicas y Naturales, Universidad Nacional de Río Cuarto, Córdoba, Argentina
| | - Cristina Ramirez
- QUIAMM-INBIOTEC-Departamento de Química, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Mar del Plata, Argentina
| | - Alejandro Parise
- QUIAMM-INBIOTEC-Departamento de Química, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Mar del Plata, Argentina
| | - P Lanza
- QUIAMM-INBIOTEC-Departamento de Química, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Mar del Plata, Argentina
| | - D Mariano Vera
- QUIAMM-INBIOTEC-Departamento de Química, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Mar del Plata, Argentina
| | - Carlos Chesta
- Facultad de Ciencias Exactas Fisicoquímicas y Naturales, Universidad Nacional de Río Cuarto, Córdoba, Argentina
| | - E Laura Moyano
- INFIQC-Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, Argentina
| | - Novruz G Akhmedov
- Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia
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Trupp L, Laurella SL, Tettamanzi MC, Barja BC, Bruttomesso AC. Long-range anisotropic effects in a V–shaped Tröger's base diformanilide: Conformational study by NMR assignment and DFT calculations. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2017.11.092] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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