1
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Roman D, Meisinger P, Guillonneau R, Peng CC, Peltner LK, Jordan PM, Haensch V, Götze S, Werz O, Hertweck C, Chen Y, Beemelmanns C. Structure Revision of a Widespread Marine Sulfonolipid Class Based on Isolation and Total Synthesis. Angew Chem Int Ed Engl 2024; 63:e202401195. [PMID: 38529534 DOI: 10.1002/anie.202401195] [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: 01/18/2024] [Revised: 03/14/2024] [Accepted: 03/15/2024] [Indexed: 03/27/2024]
Abstract
The cosmopolitan marine Roseobacter clade is of global biogeochemical importance. Members of this clade produce sulfur-containing amino lipids (SALs) involved in biofilm formation and marine surface colonization processes. Despite their physiological relevance and abundance, SALs have only been explored through genomic mining approaches and lipidomic studies based on mass spectrometry, which left the relative and absolute structures of SALs unresolved, hindering progress in biochemical and functional investigations. Herein, we report the structural revision of a new group of SALs, which we named cysteinolides, using a combination of analytical techniques, isolation and degradation experiments and total synthetic efforts. Contrary to the previously proposed homotaurine-based structures, cysteinolides are composed of an N,O-acylated cysteinolic acid-containing head group carrying various different (α-hydroxy)carboxylic acids. We also performed the first validated targeted-network based analysis, which allowed us to map the distribution and structural diversity of cysteinolides across bacterial lineages. Beyond offering structural insight, our research provides SAL standards and validated analytical data. This information holds significance for forthcoming investigations into bacterial sulfonolipid metabolism and biogeochemical nutrient cycling within marine environments.
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Affiliation(s)
- Dávid Roman
- Chemical Biology of Microbe-Host Interactions, Leibniz Institute for Natural Product Research and Infection Biology-Hans Knöll Institute (HKI), Beutenbergstrasse 11 A, 07745, Jena, Germany
- Anti-Infectives from Microbiota Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) Campus E8.1, 66123, Saarbrücken, Germany
| | - Philippe Meisinger
- Chemical Biology of Microbe-Host Interactions, Leibniz Institute for Natural Product Research and Infection Biology-Hans Knöll Institute (HKI), Beutenbergstrasse 11 A, 07745, Jena, Germany
- Biomolecular Chemistry, Leibniz Institute for Natural Product Research and Infection Biology-Hans Knöll Institute (HKI), Beutenbergstrasse 11 A, 07745, Jena, Germany
| | | | - Chia-Chi Peng
- Chemical Biology of Microbe-Host Interactions, Leibniz Institute for Natural Product Research and Infection Biology-Hans Knöll Institute (HKI), Beutenbergstrasse 11 A, 07745, Jena, Germany
- Anti-Infectives from Microbiota Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) Campus E8.1, 66123, Saarbrücken, Germany
| | - Lukas K Peltner
- Department of Pharmaceutical/Medicinal Chemistry Institute of Pharmacy-, Friedrich-Schiller-University Jena, Philosophenweg 14, 07743, Jena, Germany
| | - Paul M Jordan
- Department of Pharmaceutical/Medicinal Chemistry Institute of Pharmacy-, Friedrich-Schiller-University Jena, Philosophenweg 14, 07743, Jena, Germany
| | - Veit Haensch
- Biomolecular Chemistry, Leibniz Institute for Natural Product Research and Infection Biology-Hans Knöll Institute (HKI), Beutenbergstrasse 11 A, 07745, Jena, Germany
| | - Sebastian Götze
- Anti-Infectives from Microbiota Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) Campus E8.1, 66123, Saarbrücken, Germany
| | - Oliver Werz
- Department of Pharmaceutical/Medicinal Chemistry Institute of Pharmacy-, Friedrich-Schiller-University Jena, Philosophenweg 14, 07743, Jena, Germany
| | - Christian Hertweck
- Biomolecular Chemistry, Leibniz Institute for Natural Product Research and Infection Biology-Hans Knöll Institute (HKI), Beutenbergstrasse 11 A, 07745, Jena, Germany
- Institute of Microbiology-, Friedrich-Schiller-University Jena, 07743, Jena, Germany
| | - Yin Chen
- School of Biosciences, University of Birmingham, Edgbaston, B15 2TT, United Kingdom
| | - Christine Beemelmanns
- Chemical Biology of Microbe-Host Interactions, Leibniz Institute for Natural Product Research and Infection Biology-Hans Knöll Institute (HKI), Beutenbergstrasse 11 A, 07745, Jena, Germany
- Anti-Infectives from Microbiota Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) Campus E8.1, 66123, Saarbrücken, Germany
- Saarland University, Campus E8.1, 66123, Saarbrücken, Germany
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2
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Chandra A, Yadav N, Payra S, Parida KN. Oxidation of Thiols with IBX or DMP: One-Pot Access to Thiosulfonates or 2-Iodobenzoates and Applications in Functional Group Transformations. Org Lett 2023; 25:6256-6261. [PMID: 37602744 DOI: 10.1021/acs.orglett.3c02017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/22/2023]
Abstract
o-Iodoxybenzoic acid (IBX) and Dess-Martin periodinane (DMP) are employed for thiol to thiosulfonate conversion at rt. DMP is better than IBX in terms of reaction rate, conversion, and required equivalents. IBX-mediated oxidation of benzyl thiols produced thiosulfonates, whereas DMP afforded O-benzyl esters. The one-pot conversion of a thiol to an ester is unprecedented; this atom-economic transformation has potential for functional group transformations (FGTs), e.g., an alcohol and an aldehyde are accessed from benzyl thiol.
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Affiliation(s)
- Ajeet Chandra
- Department of Chemistry, Indian Institute of Technology (IIT) Bombay, Mumbai 400 076, India
| | - Navin Yadav
- Department of Chemistry, IIT Kanpur, Kanpur 208016, India
| | - Soumen Payra
- Department of Chemistry, IIT Kanpur, Kanpur 208016, India
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3
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Bhatt MR, Zondlo NJ. Synthesis and conformational preferences of peptides and proteins with cysteine sulfonic acid. Org Biomol Chem 2023; 21:2779-2800. [PMID: 36920119 DOI: 10.1039/d3ob00179b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
Abstract
Cysteine sulfonic acid (Cys-SO3H; cysteic acid) is an oxidative post-translational modification of cysteine, resulting from further oxidation from cysteine sulfinic acid (Cys-SO2H). Cysteine sulfonic acid is considered an irreversible post-translational modification, which serves as a biomarker of oxidative stress that has resulted in oxidative damage to proteins. Cysteine sulfonic acid is anionic, as a sulfonate (Cys-SO3-; cysteate), in the ionization state that is almost exclusively present at physiological pH (pKa ∼ -2). In order to understand protein structural changes that can occur upon oxidation to cysteine sulfonic acid, we analyzed its conformational preferences, using experimental methods, bioinformatics, and DFT-based computational analysis. Cysteine sulfonic acid was incorporated into model peptides for α-helix and polyproline II helix (PPII). Within peptides, oxidation of cysteine to the sulfonic acid proceeds rapidly and efficiently at room temperature in solution with methyltrioxorhenium (MeReO3) and H2O2. Peptides containing cysteine sulfonic acid were also generated on solid phase using trityl-protected cysteine and oxidation with MeReO3 and H2O2. Using methoxybenzyl (Mob)-protected cysteine, solid-phase oxidation with MeReO3 and H2O2 generated the Mob sulfone precursor to Cys-SO2- within fully synthesized peptides. These two solid-phase methods allow the synthesis of peptides containing either Cys-SO3- or Cys-SO2- in a practical manner, with no solution-phase synthesis required. Cys-SO3- had low PPII propensity for PPII propagation, despite promoting a relatively compact conformation in ϕ. In contrast, in a PPII initiation model system, Cys-SO3- promoted PPII relative to neutral Cys, with PPII initiation similar to Cys thiolate but less than Cys-SO2- or Ala. In an α-helix model system, Cys-SO3- promoted α-helix near the N-terminus, due to favorable helix dipole interactions and favorable α-helix capping via a sulfonate-amide side chain-main chain hydrogen bond. Across all peptides, the sulfonate side chain was significantly less ordered than that of the sulfinate. Analysis of Cys-SO3- in the PDB revealed a very strong propensity for local (i/i or i/i + 1) side chain-main chain sulfonate-amide hydrogen bonds for Cys-SO3-, with >80% of Cys-SO3- residues exhibiting these interactions. DFT calculations conducted to explore these conformational preferences indicated that side chain-main chain hydrogen bonds of the sulfonate with the intraresidue amide and/or with the i + 1 amide were favorable. However, hydrogen bonds to water or to amides, as well as interactions with oxophilic metals, were weaker for the sulfonate than the sulfinate, due to lower charge density on the oxygens in the sulfonate.
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Affiliation(s)
- Megh R Bhatt
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA.
| | - Neal J Zondlo
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA.
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4
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Yi L, He YT, Tan S, White LV, Lan P, Gardiner MG, Pei Z, Coote ML, Banwell MG. Total Syntheses of the Structures Assigned to the Marine Natural Products Orthoscuticellines A-E. J Org Chem 2022; 87:12287-12296. [PMID: 36036791 DOI: 10.1021/acs.joc.2c01477] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The readily prepared and vinylated β-carboline 11 has been converted over one or two steps into compounds 1-5, the structures assigned to the recently reported marine natural products orthoscuticellines A-E. The spectral data recorded on the synthetically derived compounds are fully consistent with the assigned structures and, on making allowances for variations in the pH of the medium in which the spectra of the natural products were recorded, it is concluded that the structures assigned to orthoscuticellines A-E are most likely correct. Certainly, the calculated 13C NMR spectra of the α-, γ-, and δ-carboline isomers of compounds 1-5 suggest that orthoscuticellines A-E do incorporate the assigned β-carboline core.
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Affiliation(s)
- Liangguang Yi
- Guangdong Key Laboratory for Research and the Development of Natural Drugs, The Marine Biomedical Research Institute, Guangdong Medical University, Zhanjiang, Guangdong 524023, China
| | - Yu-Tao He
- Institute for Advanced and Applied Chemical Synthesis, College of Pharmacy, Jinan University, Guangzhou, Guangdong 510632, China
| | - Shen Tan
- Institute for Advanced and Applied Chemical Synthesis, College of Pharmacy, Jinan University, Guangzhou, Guangdong 510632, China
| | - Lorenzo V White
- Institute for Advanced and Applied Chemical Synthesis, College of Pharmacy, Jinan University, Guangzhou, Guangdong 510632, China
| | - Ping Lan
- Institute for Advanced and Applied Chemical Synthesis, College of Pharmacy, Jinan University, Guangzhou, Guangdong 510632, China
| | - Michael G Gardiner
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601, Australia
| | - Zhipeng Pei
- Flinders Institute for Nanoscale Science and Technology, College of Science and Engineering, Flinders University, Bedford Park, SA 5042, Australia
| | - Michelle L Coote
- Flinders Institute for Nanoscale Science and Technology, College of Science and Engineering, Flinders University, Bedford Park, SA 5042, Australia
| | - Martin G Banwell
- Guangdong Key Laboratory for Research and the Development of Natural Drugs, The Marine Biomedical Research Institute, Guangdong Medical University, Zhanjiang, Guangdong 524023, China.,Institute for Advanced and Applied Chemical Synthesis, College of Pharmacy, Jinan University, Guangzhou, Guangdong 510632, China
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5
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Alvi S, Jayant V, Ali R. Applications of Oxone® in Organic Synthesis: An Emerging Green Reagent of Modern Era. ChemistrySelect 2022. [DOI: 10.1002/slct.202200704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shakeel Alvi
- Department of Chemistry, Jamia Millia Islamia, Jamia Nagar, Okhla New Delhi 110025 India
| | - Vikrant Jayant
- Department of Chemistry, Jamia Millia Islamia, Jamia Nagar, Okhla New Delhi 110025 India
| | - Rashid Ali
- Department of Chemistry, Jamia Millia Islamia, Jamia Nagar, Okhla New Delhi 110025 India
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6
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Payra S, Yadav N, Moorthy JN. Solvent-mediated switching between oxidative addition and addition–oxidation: access to β-hydroxysulfides and β-arylsulfones by the addition of thiols to olefins in the presence of Oxone. NEW J CHEM 2022. [DOI: 10.1039/d1nj04892a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Solvent-switching allows formation of either β-hydroxy-2-arylethyl aryl sulfides or 2-arylethyl aryl sulfones exclusively in thiol–ene ‘click’ reactions conducted with Oxone.
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Affiliation(s)
- Soumen Payra
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Navin Yadav
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Jarugu Narasimha Moorthy
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram 695551, India
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7
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El-Assaad TH, Zhu J, Sebastian A, McGrath DV, Neogi I, Parida KN. Dioxiranes: A Half-Century Journey. Org Chem Front 2022. [DOI: 10.1039/d2qo01005d] [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
Dioxiranes are multi-tasking reagents inheriting mild and selective oxygen transfer attributes. These oxidants are accessed from the reaction of ketones with an oxidant and are employed stoichiometrically or catalytically (in...
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8
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Chandra A, Jana K, Moorthy JN. One-Pot Synthesis of 4-Carboalkoxy-Substituted Benzo[ h]coumarins from α- and β-Naphthols and Their Excited-State Properties. ACS OMEGA 2020; 5:207-218. [PMID: 31956767 PMCID: PMC6963932 DOI: 10.1021/acsomega.9b02489] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 11/14/2019] [Indexed: 05/27/2023]
Abstract
One-pot synthesis has been developed for 4-carboethoxybenzo[h]coumarins starting from α-/β-naphthols. Accordingly, diverse 4-carboethoxybenzocoumarins can be synthesized in moderate-to-excellent (31-75%) isolated yields. The synthesis involves initial oxidation of naphthols to the intermediary 1,2-naphthoquinones with 2-iodoxybenzoic acid followed by a cascade of reactions, namely, Wittig olefination, Michael addition, β-elimination, and cyclization. Furthermore, we have comprehensively investigated the excited-state properties of differently substituted 4-carboalkoxybenzo[h]coumarins. It is shown that they exhibit low to high fluorescence quantum yields (1-36%) and excited-state lifetimes (ca. 1-7 ns) depending on the substitution pattern and solvent employed.
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9
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Uhlig S, Ivanova L, Miles CO. Oxidative Release of Thiol-Conjugated Forms of the Mycotoxin 4-Deoxynivalenol. Chem Res Toxicol 2020; 33:515-521. [PMID: 31867960 DOI: 10.1021/acs.chemrestox.9b00385] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Deoxynivalenol (DON) is a trichothecene mycotoxin that is produced by several species of Fusarium, which may infect grain crops. DON, as well as other type-B trichothecenes, contain an α,β-unsaturated carbonyl group that may react with sulfhydryl groups in, for example, amino acids and peptides. Such conjugates have been shown to occur in plants. Nucleophilic addition of thiols to the conjugated double bond in DON afforded several isomeric reaction products, and the thermodynamically favored isomers of DON-10-cysteine and DON-10-glutathione have been prepared and characterized previously. This study reports the preparation and characterization of the kinetically favored DON-10-cysteine isomer. We subsequently studied and compared the rate of the deconjugation reaction of the two DON-10-cysteine isomers and the thermodynamically favored DON-10-glutathione adduct. The deconjugation rate of the thermodynamically favored thiol conjugates was slow with half-lives of weeks even at pH 10.7, while the kinetically favored DON-10-cysteine isomer deconjugated within a few hours, affording free DON. We adapted a simple and rapid oxidation protocol in which the sulfide linkage was oxidized to a sulfoxide or sulfone that, when treated with the base, rapidly eliminated the adducted thiol as its sulfenate or sulfinate to afford free DON. The deconjugation reactions of the sulfoxides and sulfones of thermodynamically favored DON-10-thiols were complete within hours or minutes at pH 10.7, respectively. The increase in deconjugation rates for the kinetically favored DON-10-cysteine were less dramatic. Oxidation of sulfides to sulfoxides is known to occur in vivo, and thus, our data show that thiol-conjugated DON might become bioavailable via sulfide oxidation followed by elimination to regenerate DON. The oxidation-elimination approach could also be useful for the indirect quantification of DON-10-thiol conjugates in plant and animal tissues.
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Affiliation(s)
- Silvio Uhlig
- Toxinology Research Group , Norwegian Veterinary Institute , Ullevålsveien 68 , 0454 Oslo , Norway
| | - Lada Ivanova
- Toxinology Research Group , Norwegian Veterinary Institute , Ullevålsveien 68 , 0454 Oslo , Norway
| | - Christopher O Miles
- Biotoxin Metrology , National Research Council , 1411 Oxford Street , Halifax , NS B3H 3Z1 , Canada
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10
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Lu F, Li J, Wang T, Li Z, Jiang M, Hu X, Pei H, Yuan F, Lu L, Lei A. Electrochemical Oxidative C−H Sulfonylation of Anilines. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900447] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Fangling Lu
- College of Chemistry & Chemical EngineeringJiangxi Normal University Nanchang 330022, Jiangxi P. R. China
| | - Jun Li
- College of Chemistry & Chemical EngineeringJiangxi Normal University Nanchang 330022, Jiangxi P. R. China
| | - Tao Wang
- College of Chemistry & Chemical EngineeringJiangxi Normal University Nanchang 330022, Jiangxi P. R. China
| | - Zhen Li
- College of Chemistry & Chemical EngineeringJiangxi Normal University Nanchang 330022, Jiangxi P. R. China
| | - Minbao Jiang
- College of Chemistry & Chemical EngineeringJiangxi Normal University Nanchang 330022, Jiangxi P. R. China
| | - Xingxing Hu
- College of Chemistry & Chemical EngineeringJiangxi Normal University Nanchang 330022, Jiangxi P. R. China
| | - Hongqiao Pei
- College of Chemistry & Chemical EngineeringJiangxi Normal University Nanchang 330022, Jiangxi P. R. China
| | - Feng Yuan
- College of Chemistry & Chemical EngineeringJiangxi Normal University Nanchang 330022, Jiangxi P. R. China
| | - Lijun Lu
- College of Chemistry and Molecular Sciences The Institute for Advanced Studies (IAS)Wuhan University Wuhan, Hubei 430072 P. R. China
| | - Aiwen Lei
- College of Chemistry & Chemical EngineeringJiangxi Normal University Nanchang 330022, Jiangxi P. R. China
- College of Chemistry and Molecular Sciences The Institute for Advanced Studies (IAS)Wuhan University Wuhan, Hubei 430072 P. R. China
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11
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Moreira RE, Sinclair GS, Schipper DJ. Oxidative ring-opening of benzothiazole derivatives. CAN J CHEM 2019. [DOI: 10.1139/cjc-2018-0459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
An oxidative ring opening of benzothiazole to an acylamidobenzene sulfonate ester using alcohol solvents and magnesium monoperxoyphthalate hexahydrate has been described. Under the established conditions, the reaction produces synthetically significant yields with a variety of benzothiazole derivatives. A sulfonate ester intermediate suggests that the reaction proceeds via thiazole ring opening followed by thiol oxidation.
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Affiliation(s)
- Ryan E. Moreira
- Department of Chemistry, University of Waterloo, Waterloo, ON N2L 3N1, Canada
- Department of Chemistry, University of Waterloo, Waterloo, ON N2L 3N1, Canada
| | - Geoffrey S. Sinclair
- Department of Chemistry, University of Waterloo, Waterloo, ON N2L 3N1, Canada
- Department of Chemistry, University of Waterloo, Waterloo, ON N2L 3N1, Canada
| | - Derek J. Schipper
- Department of Chemistry, University of Waterloo, Waterloo, ON N2L 3N1, Canada
- Department of Chemistry, University of Waterloo, Waterloo, ON N2L 3N1, Canada
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12
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Perin G, Soares LK, Hellwig PS, Silva MS, Neto JSS, Roehrs JA, Barcellos T, Lenardão EJ. Synthesis of 2,3-bis-organochalcogenyl-benzo[b]chalcogenophenes promoted by Oxone®. NEW J CHEM 2019. [DOI: 10.1039/c9nj00526a] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We report here an alternative and tunable metal-free synthesis of benzo[b]chalcogenophenes via the electrophilic cyclization of 2-functionalized chalcogenoalkynes promoted by Oxone®.
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Affiliation(s)
- Gelson Perin
- LASOL-CCQFA
- Universidade Federal de Pelotas – UFPel
- 96010-900, Pelotas
- Brazil
| | - Liane K. Soares
- LASOL-CCQFA
- Universidade Federal de Pelotas – UFPel
- 96010-900, Pelotas
- Brazil
| | - Paola S. Hellwig
- LASOL-CCQFA
- Universidade Federal de Pelotas – UFPel
- 96010-900, Pelotas
- Brazil
| | - Marcio S. Silva
- LASOL-CCQFA
- Universidade Federal de Pelotas – UFPel
- 96010-900, Pelotas
- Brazil
| | - José S. S. Neto
- LASOL-CCQFA
- Universidade Federal de Pelotas – UFPel
- 96010-900, Pelotas
- Brazil
| | - Juliano A. Roehrs
- Instituto Federal Sul-Rio-Grandense
- Campus Pelotas – Praça Vinte de Setembro
- Brazil
| | - Thiago Barcellos
- Laboratory of Biotechnology of Natural and Synthetic Products – Universidade de Caxias do Sul – UCS
- Caxias do Sul
- Brazil
| | - Eder J. Lenardão
- LASOL-CCQFA
- Universidade Federal de Pelotas – UFPel
- 96010-900, Pelotas
- Brazil
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13
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Synthesis of starch functionalized sulfonic acid co-imidazolium/silica composite for improving oil recovery through chemical flooding technologies. Int J Biol Macromol 2018; 118:1614-1626. [DOI: 10.1016/j.ijbiomac.2018.07.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 06/28/2018] [Accepted: 07/03/2018] [Indexed: 11/17/2022]
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14
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Palomba M, Trappetti F, Bagnoli L, Santi C, Marini F. Oxone-Mediated Oxidation of Vinyl Selenides in Water. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800498] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Martina Palomba
- Department of Pharmaceutical Sciences; Group of Catalysis and Organic Green Chemistry; University of Perugia; Via del Liceo, 1 06123 Perugia Italy
| | - Francesco Trappetti
- Department of Pharmaceutical Sciences; Group of Catalysis and Organic Green Chemistry; University of Perugia; Via del Liceo, 1 06123 Perugia Italy
| | - Luana Bagnoli
- Department of Pharmaceutical Sciences; Group of Catalysis and Organic Green Chemistry; University of Perugia; Via del Liceo, 1 06123 Perugia Italy
| | - Claudio Santi
- Department of Pharmaceutical Sciences; Group of Catalysis and Organic Green Chemistry; University of Perugia; Via del Liceo, 1 06123 Perugia Italy
| | - Francesca Marini
- Department of Pharmaceutical Sciences; Group of Catalysis and Organic Green Chemistry; University of Perugia; Via del Liceo, 1 06123 Perugia Italy
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15
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Perin G, Santoni P, Barcellos AM, Nobre PC, Jacob RG, Lenardão EJ, Santi C. Selenomethoxylation of Alkenes Promoted by Oxone®. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701775] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Gelson Perin
- Laboratório de Síntese Orgânica Limpa - LASOL; Federal University of Pelotas - UFPel; P.O. Box 354 96010-900 Pelotas - RS Brazil
| | - Paolo Santoni
- Department of Pharmaceutical Sciences; University of Perugia; Via del Liceo 1 Perugia (PG) Italy
| | - Angelita M. Barcellos
- Laboratório de Síntese Orgânica Limpa - LASOL; Federal University of Pelotas - UFPel; P.O. Box 354 96010-900 Pelotas - RS Brazil
| | - Patrick C. Nobre
- Laboratório de Síntese Orgânica Limpa - LASOL; Federal University of Pelotas - UFPel; P.O. Box 354 96010-900 Pelotas - RS Brazil
| | - Raquel G. Jacob
- Laboratório de Síntese Orgânica Limpa - LASOL; Federal University of Pelotas - UFPel; P.O. Box 354 96010-900 Pelotas - RS Brazil
| | - Eder J. Lenardão
- Laboratório de Síntese Orgânica Limpa - LASOL; Federal University of Pelotas - UFPel; P.O. Box 354 96010-900 Pelotas - RS Brazil
| | - Claudio Santi
- Department of Pharmaceutical Sciences; University of Perugia; Via del Liceo 1 Perugia (PG) Italy
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