1
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Batabyal M, Chaurasia D, Panda PR, Jha RK, Kadu R, Kumar S. Benzoimidazolyl Organoseleniums: Antioxidant Activity and Catalysts for Selective Iodination of Arenes and Nitro-Michael Reaction. J Org Chem 2024; 89:14328-14340. [PMID: 39283162 DOI: 10.1021/acs.joc.4c01757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2024]
Abstract
Here, the synthesis and catalytic activities of benzoimidazole-derived organoselenium compounds have been explored. The synthesized bis(2-benzoimidazolyl) diselenide, having increased Lewis acidity on the selenium center, outperforms simple phenyl and N-phenyl benzamide-based diselenides when compared for thiol peroxidase hydrogen peroxide decomposing antioxidant activity with a reduction rate of 18.6 ± 1.9 μM/s. The synthesized diselenide also acted as an efficient catalyst for the activation of N-iodo-succinimide toward the regioselective, monoiodination of electron-rich arenes and activation of nitro-alkene for nitro-Michael reactions for the first time.
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Affiliation(s)
- Monojit Batabyal
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal by-pass Road, Bhauri, Bhopal, Madhya Pradesh 462066, India
| | - Deeksha Chaurasia
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal by-pass Road, Bhauri, Bhopal, Madhya Pradesh 462066, India
| | - Priyanka Rani Panda
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal by-pass Road, Bhauri, Bhopal, Madhya Pradesh 462066, India
| | - Raushan Kumar Jha
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal by-pass Road, Bhauri, Bhopal, Madhya Pradesh 462066, India
| | - Rahul Kadu
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal by-pass Road, Bhauri, Bhopal, Madhya Pradesh 462066, India
- MIT School of Engineering, MIT Art, Design and Technology University, Pune, Maharashtra 412201, India
| | - Sangit Kumar
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal by-pass Road, Bhauri, Bhopal, Madhya Pradesh 462066, India
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2
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Chhillar B, Kadian R, Kumar M, Yadav M, Sodhi N, Xavier da Silva TN, Friedmann Angeli JP, Singh VP. Aminic Organoselenium Compounds as Glutathione Peroxidase Mimics and Inhibitors of Ferroptosis. Chembiochem 2024; 25:e202400074. [PMID: 38293899 DOI: 10.1002/cbic.202400074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 12/03/2023] [Accepted: 01/29/2024] [Indexed: 02/01/2024]
Abstract
The synthesis of diarylamine-based organoselenium compounds via the nucleophilic substitution reactions has been described. Symmetrical monoselenides and diselenides were conveniently synthesized by the reduction of their corresponding selenocyanates using sodium borohydride. Selenocyanates were obtained from 2-chloro acetamides by the nucleophilic displacement with potassium selenocyanate. Selenides were synthesized by treating the 2-chloro acetamides with in situ generated sodium butyl selenolate as nucleophile. Further, the newly synthesized organoselenium compounds were evaluated for their glutathione peroxidase (GPx)-like activity in thiophenol assay. This study revealed that the methoxy-substituted organoselenium compounds showed significant effect on the GPx-like activity. The catalytic parameters for the most efficient catalysts were also determined. The anti-ferroptotic activity for all GPx-mimics evaluated in a 4-OH-tamoxifen (TAM) inducible GPx4 knockout cell line using liproxstatin as standard.
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Affiliation(s)
- Babli Chhillar
- Department of Chemistry & Centre of Advanced Studies in Chemistry, Panjab University, Sector-14, Chandigarh, 160 014, India
| | - Rajni Kadian
- Department of Chemistry & Centre of Advanced Studies in Chemistry, Panjab University, Sector-14, Chandigarh, 160 014, India
| | - Manish Kumar
- Department of Chemistry & Centre of Advanced Studies in Chemistry, Panjab University, Sector-14, Chandigarh, 160 014, India
| | - Manisha Yadav
- Department of Chemistry & Centre of Advanced Studies in Chemistry, Panjab University, Sector-14, Chandigarh, 160 014, India
| | - Nikhil Sodhi
- Department of Chemistry & Centre of Advanced Studies in Chemistry, Panjab University, Sector-14, Chandigarh, 160 014, India
| | - Thamara Nishida Xavier da Silva
- Rudolf Virchow Zentrum, Centre for Integrative and Translational Bioimaging, Julius-Maximillian, University of Wurzburg, 97080, Wurzburg, Germany
| | - Jose Pedro Friedmann Angeli
- Rudolf Virchow Zentrum, Centre for Integrative and Translational Bioimaging, Julius-Maximillian, University of Wurzburg, 97080, Wurzburg, Germany
| | - Vijay P Singh
- Department of Chemistry & Centre of Advanced Studies in Chemistry, Panjab University, Sector-14, Chandigarh, 160 014, India
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3
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Jain S, Batabyal M, Thorat RA, Choudhary P, Jha RK, Kumar S. 2-Benzamide Tellurenyl Iodides: Synthesis and Their Catalytic Role in CO 2 Mitigation. Chemistry 2023; 29:e202301502. [PMID: 37338224 DOI: 10.1002/chem.202301502] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 06/06/2023] [Accepted: 06/20/2023] [Indexed: 06/21/2023]
Abstract
Benzamide-derived organochalcogens (chalcogen=S, Se, and Te) have shown promising interest in biological and synthetic chemistry. Ebselen molecule derived from benzamide moiety is the most studied organoselenium. However, its heavier congener organotellurium is under-explored. Here, an efficient copper-catalyzed atom economical synthetic method has been developed to synthesize 2-phenyl-benzamide tellurenyl iodides by inserting a tellurium atom into carbon-iodine bond of 2-iodobenzamides in one pot with 78-95 % yields. Further, the Lewis acidic nature of Te center and Lewis basic nature of nitrogen of the synthesized 2-Iodo-N-(quinolin-8-yl)benzamide tellurenyl iodides enabled them as pre-catalyst for the activation of epoxide with CO2 at 1 atm for the preparation of cyclic carbonates with TOF and TON values of 1447 h-1 and 4343, respectively, under solvent-free conditions. In addition, 2-iodo-N-(quinolin-8-yl)benzamide tellurenyl iodides have also been used as pre-catalyst for activating anilines and CO2 to form a variety of 1,3-diaryl ureas up to 95 % yield. The mechanistic investigation for CO2 mitigation is done by 125 Te NMR and HRMS studies. It seems that the reaction proceeds via formation of catalytically active Te-N heterocycle, an ebtellur intermediate which is isolated and structurally characterized.
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Affiliation(s)
- Saket Jain
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri By-pass Road, Bhopal, 462 066, Madhya Pradesh, India
| | - Monojit Batabyal
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri By-pass Road, Bhopal, 462 066, Madhya Pradesh, India
| | - Raviraj Ananda Thorat
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri By-pass Road, Bhopal, 462 066, Madhya Pradesh, India
| | - Pratibha Choudhary
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri By-pass Road, Bhopal, 462 066, Madhya Pradesh, India
| | - Raushan Kumar Jha
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri By-pass Road, Bhopal, 462 066, Madhya Pradesh, India
| | - Sangit Kumar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri By-pass Road, Bhopal, 462 066, Madhya Pradesh, India
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4
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Neto JSS, Granja IJA, Scheide MR, Franco MS, Moraes CAO, Beatriz A, de Lima DP, Botteselle GV, Frizon TEA, Saba S, Rafique J, Braga AL. Catalyst- and metal-free C(sp 2)-H bond selenylation of (N-hetero)-arenes using diselenides and trichloroisocyanuric acid at room temperature. Sci Rep 2023; 13:14251. [PMID: 37652946 PMCID: PMC10471583 DOI: 10.1038/s41598-023-41430-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 08/26/2023] [Indexed: 09/02/2023] Open
Abstract
In this paper, we report an eco-friendly approach for the C(sp2)-H bond selenylation of imidazopyridines and other N-heteroarenes as well as simple arenes at ambient temperature. This new protocol consists of the reaction between (N-hetero)-arenes and the diorganyl-diselenides and trichloroisocyanuric acid (TCCA)-ethanol reagent system. In a short reaction time, the desired selenylated products were obtained regioselectively in good yields, with tolerance for a wide range of functional groups.
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Affiliation(s)
- José S S Neto
- Departamento de Química, Universidade Federal de Santa Catarina-UFSC, Florianópolis, SC, 88040-970, Brazil
- Instituto de Química, Universidade Federal de Goiás-UFG, Goiânia, GO, 74690-900, Brazil
| | - Isis J A Granja
- Instituto de Química, Universidade Federal de Goiás-UFG, Goiânia, GO, 74690-900, Brazil
| | - Marcos R Scheide
- Departamento de Química, Universidade Federal de Santa Catarina-UFSC, Florianópolis, SC, 88040-970, Brazil
| | - Marcelo S Franco
- Departamento de Química, Universidade Federal de Santa Catarina-UFSC, Florianópolis, SC, 88040-970, Brazil
| | - Cassio A O Moraes
- Instituto de Química, Universidade Federal do Mato Grosso do Sul-UFMS, Campo Grande, MS, 79074-460, Brazil
| | - Adilson Beatriz
- Instituto de Química, Universidade Federal do Mato Grosso do Sul-UFMS, Campo Grande, MS, 79074-460, Brazil
| | - Dênis P de Lima
- Instituto de Química, Universidade Federal do Mato Grosso do Sul-UFMS, Campo Grande, MS, 79074-460, Brazil
| | - Giancarlo V Botteselle
- Departamento de Química, Universidade Estadual do Centro-Oeste-UNICENTRO, Guarapuava, PR, 85819-110, Brazil
| | - Tiago E A Frizon
- Universidade Federal de Santa Catarina-UFSC, Campus Araranguá, Araranguá, SC, 88905-120, Brazil
| | - Sumbal Saba
- Instituto de Química, Universidade Federal de Goiás-UFG, Goiânia, GO, 74690-900, Brazil
| | - Jamal Rafique
- Instituto de Química, Universidade Federal de Goiás-UFG, Goiânia, GO, 74690-900, Brazil.
- Instituto de Química, Universidade Federal do Mato Grosso do Sul-UFMS, Campo Grande, MS, 79074-460, Brazil.
| | - Antonio L Braga
- Departamento de Química, Universidade Federal de Santa Catarina-UFSC, Florianópolis, SC, 88040-970, Brazil.
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Kumar M, Chhillar B, Verma D, Nain S, Singh VP. Introduction of Methyl Group in Substituted Isoselenazolones: Catalytic and Mechanistic Study. J Org Chem 2023; 88:4273-4285. [PMID: 36930142 DOI: 10.1021/acs.joc.2c02831] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
Copper-catalyzed direct selenation of substituted 2-bromo-N-phenylbenzamide substrates with elemental selenium powder provided a series of methoxy-substituted isoselenazolones via the C-Se and Se-N bond formations. Phenolic substituted isoselenazolones have been obtained by O-demethylation of the corresponding methoxy-substituted analogues using boron tribromide. Some isoselenazolones have been structurally characterized by X-ray single-crystal analysis. The glutathione peroxidase (GPx)-like antioxidant activity of isoselenazolones has been evaluated both in thiophenol and coupled-reductase assays. All isoselenazolones showed good GPx-like activities in the coupled-reductase assay. The ferric-reducing antioxidant power of phenolic antioxidants has also been evaluated. The best phenolic antioxidants were found to be good ferric-reducing antioxidant power agents. The single electron transfer, hydrogen atom transfer, and proton-coupled electron transfer mechanisms for the antioxidant properties of all catalysts have been supported by density functional theory calculations. The catalytic cycle was proposed for one of the phenolic isoselenazolones involving diselenide, selenenyl sulfide, selenol, and selenenic acid as intermediates using 77Se{1H} NMR spectroscopy.
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Affiliation(s)
- Manish Kumar
- Department of Chemistry & Centre of Advanced Studies in Chemistry, Panjab University, Sector-14, Chandigarh 160 014, India
| | - Babli Chhillar
- Department of Chemistry & Centre of Advanced Studies in Chemistry, Panjab University, Sector-14, Chandigarh 160 014, India
| | - Divya Verma
- Department of Chemistry & Centre of Advanced Studies in Chemistry, Panjab University, Sector-14, Chandigarh 160 014, India
| | - Sumit Nain
- Department of Chemistry & Centre of Advanced Studies in Chemistry, Panjab University, Sector-14, Chandigarh 160 014, India
| | - Vijay P Singh
- Department of Chemistry & Centre of Advanced Studies in Chemistry, Panjab University, Sector-14, Chandigarh 160 014, India
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6
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Wang Q, Xiao F, Huang Z, Mao G, Deng GJ. CuBr 2-Catalyzed Annulation of 2-Bromo- N-Arylbenzimidamide with Se/S 8 Powder for the Synthesis of Benzo[ d]isoselenazole and Benzo[ d]isothiazole. J Org Chem 2023; 88:1963-1976. [PMID: 36720013 DOI: 10.1021/acs.joc.2c02088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A CuBr2-catalyzed annulation of 2-bromo-N-arylbenzimidamide with selenium/sulfur powder for the synthesis of benzo[d]isoselenazole and benzo[d]isothiazole in generally good yields was investigated. This synthetic strategy features good substrate scope and functional group tolerance. Furthermore, the corresponding products could be converted into N-aryl indoles via rhodiumIII-catalyzed ortho C-H activation of the N-phenyl ring, providing an efficient approach for axial aromatic molecules.
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Affiliation(s)
- Quanyuan Wang
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Hunan Province Key Laboratory of Green Organic Synthesis and Application, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Fuhong Xiao
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Hunan Province Key Laboratory of Green Organic Synthesis and Application, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Zhi Huang
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Hunan Province Key Laboratory of Green Organic Synthesis and Application, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Guojiang Mao
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
| | - Guo-Jun Deng
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Hunan Province Key Laboratory of Green Organic Synthesis and Application, College of Chemistry, Xiangtan University, Xiangtan 411105, China
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7
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Kumar M, Sharma D, Singh VP. Modulation of the chain-breaking antioxidant activity of phenolic organochalcogens with various co-antioxidants at various pH values. Org Biomol Chem 2023; 21:1316-1327. [PMID: 36648399 DOI: 10.1039/d2ob01988d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Phenolic organochalcogen chain-breaking antioxidants, i.e. 6-bromo-8 (hexadecyltellanyl)-3,3-dimethyl-1,5-dihydro-[1,3]dioxepino[5,6-c]pyridin-9-ol and 2-methyl-2,3-dihydrobenzo[b]selenophene-5-ol, have been investigated in a two-phase (chlorobenzene/water) lipid peroxidation model system as potent inhibitors of lipid peroxyl radicals with various co-antioxidants at various pH values. The pH has a significant effect on the chain-breaking antioxidant activities of phenolic organochalcogens. The key chain-breaking mechanism profile was attributed to the first oxygen atom transfer from the lipid peroxyl radicals to the Se/Te atom, followed by hydrogen atom transfer in a solvent cage from the nearby phenolic group to the resulting alkoxyl radical. Finally, regeneration of organochalcogen antioxidants could take place in the presence of aqueous-soluble co-antioxidants. Also, in the presence of aqueous soluble N-acetylcysteine at pH 1-7, both antioxidants behaved as very good inhibitors of lipid peroxyl radicals. The role of aqueous soluble mild co-antioxidants in the regeneration studies of organochalcogen antioxidants has been investigated in a two-phase lipid peroxidation model system. The importance of the phase transfer catalyst has been explored in the inhibition studies of selenium containing antioxidants using an Fe(II) source. The overall pH-dependent antioxidant activities of organochalcogens depend on their hydrogen atom transfer ability, relative stability, and distribution in the aqueous/lipid phase.
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Affiliation(s)
- Manish Kumar
- Department of Chemistry & Centre of Advanced Studies in Chemistry, Panjab University, Sector-14, Chandigarh - 160 014, India.
| | - Deepika Sharma
- Department of Chemistry & Centre of Advanced Studies in Chemistry, Panjab University, Sector-14, Chandigarh - 160 014, India.
| | - Vijay P Singh
- Department of Chemistry & Centre of Advanced Studies in Chemistry, Panjab University, Sector-14, Chandigarh - 160 014, India.
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Xu-Xu QF, Nishii Y, Miura M. Synthesis of Diarylselenides through Rh-Catalyzed Direct Diarylation of Elemental Selenium with Benzamides. J Org Chem 2022; 87:16887-16894. [DOI: 10.1021/acs.joc.2c02131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Affiliation(s)
- Qing-Feng Xu-Xu
- Innovative Catalysis Science Division, Institute for Open and Transitionary Research Initiative (ICS-OTRI), Osaka University, Suita, Osaka 565-0871, Japan
| | - Yuji Nishii
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Masahiro Miura
- Innovative Catalysis Science Division, Institute for Open and Transitionary Research Initiative (ICS-OTRI), Osaka University, Suita, Osaka 565-0871, Japan
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Batabyal M, Upadhyay A, Kadu R, Birudukota NC, Chopra D, Kumar S. Tetravalent Spiroselenurane Catalysts: Intramolecular Se···N Chalcogen Bond-Driven Catalytic Disproportionation of H 2O 2 to H 2O and O 2 and Activation of I 2 and NBS. Inorg Chem 2022; 61:8729-8745. [PMID: 35638247 DOI: 10.1021/acs.inorgchem.2c00651] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Chalcogen-bonding interactions have recently gained considerable attention in the field of synthetic chemistry, structure, and bonding. Here, three organo-spiroselenuranes, having a Se(IV) center with a strong intramolecular Se···N chalcogen-bonded interaction, have been isolated by the oxidation of the respective bis(2-benzamide) selenides derived from an 8-aminoquinoline ligand. Further, the synthesized spiroselenuranes, when assayed for their antioxidant activity, show disproportionation of hydrogen peroxide into H2O and O2 with first-order kinetics with respect to H2O2 for the first time by any organoselenium molecules as monitored by 1H NMR spectroscopy. Electron-donating 5-methylthio-benzamide ring-substituted spiroselenurane disproportionates hydrogen peroxide at a high rate of 15.6 ± 0.4 × 103 μM min-1 with a rate constant of 8.57 ± 0.50 × 10-3 s-1, whereas 5-methoxy and unsubstituted-benzamide spiroselenuranes catalyzed the disproportionation of H2O2 at rates of 7.9 ± 0.3 × 103 and 2.9 ± 0.3 × 103 μM min-1 with rate constants of 1.16 ± 0.02 × 10-3 and 0.325 ± 0.025 × 10-3 s-1, respectively. The evolved oxygen gas from the spiroselenurane-catalyzed disproportion of H2O2 has also been confirmed by a gas chromatograph-thermal conductivity detector (GCTCD) and a portable digital polarographic dissolved O2 probe. Additionally, the synthesized spiroselenuranes exhibit thiol peroxidase antioxidant activities for the reduction of H2O2 by a benzenethiol co-reductant monitored by UV-visible spectroscopy. Next, the Se···N bonded spiroselenuranes have been explored as catalysts in synthetic oxidation iodolactonization and bromination of arenes. The synthesized spiroselenurane has activated I2 toward the iodolactonization of alkenoic acids under base-free conditions. Similarly, efficient chemo- and regioselective monobromination of various arenes with NBS catalyzed by chalcogen-bonded synthesized spiroselenuranes has been achieved. Mechanistic insight into the spiroselenuranes in oxidation reactions has been gained by 77Se NMR, mass spectrometry, UV-visible spectroscopy, single-crystal X-ray structure, and theoretical (DFT, NBO, and AIM) studies. It seems that the highly electrophilic nature of the selenium center is attributed to the presence of an intramolecular Se···N interaction and a vacant coordination site in spiroselenuranes is crucial for the activation of H2O2, I2, and NBS. The reaction of H2O2, I2, and NBS with tetravalent spiroselenurane would lead to an octahedral-Se(VI) intermediate, which is reduced back to Se(IV) due to thermodynamic instability of selenium in its highest oxidation state and the presence of a strong intramolecular N-donor atom.
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Affiliation(s)
- Monojit Batabyal
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal Bypass Road, Bhauri Bhopal 462 066, Madhya Pradesh, India
| | - Aditya Upadhyay
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal Bypass Road, Bhauri Bhopal 462 066, Madhya Pradesh, India
| | - Rahul Kadu
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal Bypass Road, Bhauri Bhopal 462 066, Madhya Pradesh, India.,MIT School of Engineering, MIT Art, Design and Technology University Pune, Loni Kalbhor, Maharashtra 412201, India
| | - Nihal Chaitanya Birudukota
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal Bypass Road, Bhauri Bhopal 462 066, Madhya Pradesh, India
| | - Deepak Chopra
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal Bypass Road, Bhauri Bhopal 462 066, Madhya Pradesh, India
| | - Sangit Kumar
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal Bypass Road, Bhauri Bhopal 462 066, Madhya Pradesh, India
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Batabyal M, Jain S, Upadhyay A, Raju S, Kumar S. A Base-Free Copper-Assisted Synthesis of C2-Symmetric Spirotelluranes and Biaryls Based on Divergent Stoichiometry of Na2Te. Chem Commun (Camb) 2022; 58:7050-7053. [DOI: 10.1039/d2cc02181a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A one pot Cu(I)-assisted synthetic methodology has been developed for the preparation of biologically important C2-symmetric spirodiaza, benzyloxy, benzoxytelluranes from 2-bromo-N-aryl benzamides, benzyl alcohols, and benzoic acid by using tellurium...
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11
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Kumar M, Singh VP. Synthesis and antioxidant activities of N-thiophenyl ebselenamines: a 77Se{ 1H} NMR mechanistic study. NEW J CHEM 2022. [DOI: 10.1039/d2nj01225a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthesis of N-thiophenyl ebselenamines and selenenyl sulphides as efficient radical-trapping and hydroperoxide-decomposing antioxidants, respectively has been described.
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Affiliation(s)
- Manish Kumar
- Department of Chemistry & Centre of Advanced Studies in Chemistry, Panjab University, Sector-14, Chandigarh 160 014, India
| | - Vijay P. Singh
- Department of Chemistry & Centre of Advanced Studies in Chemistry, Panjab University, Sector-14, Chandigarh 160 014, India
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13
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Yang K, Liu M, Zhang Y, Zhan J, Deng L, Zheng X, Zhou Y, Wang Z. Progress in the Synthesis of Benzoheterocycles from 2-Halobenzamides. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202101044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Liu Z, Jiang Y, Liu C, Zhang L, Wang J, Li T, Zhang H, Li M, Yang X. Metal-Free Synthesis of Phenol-Aryl Selenides via Dehydrogenative C-Se Coupling of Aryl Selenoxides with Phenols. J Org Chem 2020; 85:7386-7398. [PMID: 32370509 DOI: 10.1021/acs.joc.0c00792] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Herein, we disclose the synthesis of diaryl selenides through an unexpected C-Se coupling between aryl benzyl selenoxides and phenols. The synthetic significance of the method is that it provides a mild, rapid, and metal-free access to organoselenides in high yields with excellent functional group tolerance. This coupling of aryl benzyl selenoxides reveals a completely new reaction possibility compared with aryl sulfoxides. We also probed the reaction mechanism of this unexpected transformation through experimental studies and revealed a special Se(IV)-Se(III)-Se(II) reaction pathway.
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Affiliation(s)
- Zhengfen Liu
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China
| | - Yonggang Jiang
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China
| | - Chunxiang Liu
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China
| | - Linlin Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China
| | - Jing Wang
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China
| | - Tiantian Li
- Department of Soil and Water Science, Tropical Research and Education Center, University of Florida, Homestead 33031, Florida, USA
| | - Hongbin Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China
| | - Minyan Li
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China
| | - Xiaodong Yang
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China
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15
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Upadhyay A, Batabyal M, Kanika, Kumar S. Organoseleniums: Generated and Exploited in Oxidative Reactions. CHEM LETT 2020. [DOI: 10.1246/cl.200015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Aditya Upadhyay
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal By-pass Road, Bhauri, Bhopal 462066, Madhya Pradesh India
| | - Monojit Batabyal
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal By-pass Road, Bhauri, Bhopal 462066, Madhya Pradesh India
| | - Kanika
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal By-pass Road, Bhauri, Bhopal 462066, Madhya Pradesh India
| | - Sangit Kumar
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal By-pass Road, Bhauri, Bhopal 462066, Madhya Pradesh India
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16
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Kumar J, Kumar N, Sati N, Hota PK. Antioxidant properties of ethenyl indole: DPPH assay and TDDFT studies. NEW J CHEM 2020. [DOI: 10.1039/d0nj01317j] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Ethenyl indole exhibits antioxidant activity in a substituent dependent manner. Ethenyls bearing strong electron withdrawing substituents show weak or no antioxidant activities, whereas ethenyls with electron donating substituents exhibit antioxidant properties comparable to vitamin E.
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Affiliation(s)
- Jagdeep Kumar
- Department of Chemistry
- School of Sciences
- Hemvati Nandan Bahuguna Garhwal University
- Srinagar (Garhwal)
- India
| | - Naresh Kumar
- Department of Chemistry
- School of Sciences
- Hemvati Nandan Bahuguna Garhwal University
- Srinagar (Garhwal)
- India
| | - Nitin Sati
- Department of Pharmaceutical Sciences
- School of Sciences
- Hemvati Nandan Bahuguna Garhwal University
- Srinagar (Garhwal)
- India
| | - Prasanta Kumar Hota
- Department of Chemistry
- School of Sciences
- Hemvati Nandan Bahuguna Garhwal University
- Srinagar (Garhwal)
- India
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17
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Arai K, Osaka Y, Haneda M, Sato Y. Cyclic telluride reagents with remarkable glutathione peroxidase-like activity for purification-free synthesis of highly pure organodisulfides. Catal Sci Technol 2019. [DOI: 10.1039/c9cy00562e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cyclic tellurides enable rapid and quantitative oxidation of various organothiols through a GPx-like catalytic cycle in a biphasic microflow system.
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Affiliation(s)
- Kenta Arai
- Department of Chemistry
- School of Science
- Tokai University
- Hiratsuka-shi
- Japan
| | - Yuui Osaka
- Department of Chemistry
- School of Science
- Tokai University
- Hiratsuka-shi
- Japan
| | - Masahiro Haneda
- Department of Chemistry
- School of Science
- Tokai University
- Hiratsuka-shi
- Japan
| | - Yuumi Sato
- Department of Chemistry
- School of Science
- Tokai University
- Hiratsuka-shi
- Japan
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