1
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Sittihan S, Harada S, Isono T, Nemoto T, Ruchirawat S. Molecular Reconstruction with Stereochemical Relay: An Investigation into the Rearrangement of Spiro[4.5]decadienone to Benzoxepane. Chem Asian J 2024; 19:e202300937. [PMID: 37986694 DOI: 10.1002/asia.202300937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 11/19/2023] [Accepted: 11/20/2023] [Indexed: 11/22/2023]
Abstract
Herein, we report the unusual skeletal rearrangement of spiro[4.5]decadienone to benzoxepane. In particular, Lewis acid-promoted epoxide-opening ipso-cyclization of aryl epoxides afforded spiro[4.5]decadienone intermediates. Subsequent thermal activation assembled a benzoxepane core via rearomative molecular reorganization. The sequence was high-yielding and highly diastereoselective but sensitive to the aromatic substitution pattern and the epoxide side chain. Mechanistic studies suggested that the rearrangement proceeded via an uncommon intramolecular enolate attack onto the electrophilic O of p-quinone oxonium zwitterion. DFT calculations helped rationalize the product distribution and the origin of diastereoselectivity. Initial investigation into the application of this chemical transformation is also presented.
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Affiliation(s)
- Satapanawat Sittihan
- Program on Chemical Sciences, Chulabhorn Graduate Institute, Chulabhorn Royal Academy, Center of Excellence on Environmental Health and Toxicology (EHT), Office of the Permanent Secretary, Ministry of Higher Education, Science, Research and Innovation, 906 Kamphaeng Phet 6, Talat Bang Khen, Lak Si, Bangkok, 10210, Thailand
| | - Shingo Harada
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba, 260-8675, Japan
| | - Tomohiro Isono
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba, 260-8675, Japan
| | - Tetsuhiro Nemoto
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba, 260-8675, Japan
| | - Somsak Ruchirawat
- Program on Chemical Sciences, Chulabhorn Graduate Institute, Chulabhorn Royal Academy, Center of Excellence on Environmental Health and Toxicology (EHT), Office of the Permanent Secretary, Ministry of Higher Education, Science, Research and Innovation, 906 Kamphaeng Phet 6, Talat Bang Khen, Lak Si, Bangkok, 10210, Thailand
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Talat Bang Khen, Lak Si, Bangkok, 10210, Thailand
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2
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Mondal S, Mukherjee S. Catalytic Generation of Remote C–N Axial Chirality through Atroposelective de novo Arene Construction. Org Lett 2022; 24:8300-8304. [DOI: 10.1021/acs.orglett.2c03272] [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)
- Subhajit Mondal
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Santanu Mukherjee
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
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3
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Sanzhiev AN, Krasnokutskaya EA, Erin KD, Filimonov VD. Diazotization of Aminopyridines in the Presence of Camphorsulfonic Acid. Synthesis and Some Properties of Pyridinyl Camphorsulfonates. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2021. [DOI: 10.1134/s1070428021060063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Zhao Y, Wang Y, Zhang C, Xu X, Wang S. Synthesis of Novel Camphor Sulfamoxime Ether Derivatives and Its Application in Antitumor Activity. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202009050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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5
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The Molecular and Macromolecular Level of Carbon Nanotube Modification Via Diazonium Chemistry: Emphasis on the 2010s Years. CHEMISTRY AFRICA 2020. [DOI: 10.1007/s42250-020-00144-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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6
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Dhakal R, Li X, Parkin SR, Lehmler HJ. Synthesis of mono- and dimethoxylated polychlorinated biphenyl derivatives starting from fluoroarene derivatives. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:8905-8925. [PMID: 31893358 PMCID: PMC7098850 DOI: 10.1007/s11356-019-07133-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 11/20/2019] [Indexed: 06/10/2023]
Abstract
Polychlorinated biphenyls (PCBs) are environmental pollutants implicated in a variety of adverse health effects, including cancer and noncancer diseases in animals and humans. PCBs are metabolized to hydroxylated compounds, and some of these PCB metabolites are more toxic than the parent PCBs. Unfortunately, most PCB metabolites needed for toxicological studies are not available from commercial sources. Moreover, it is challenging to synthesize PCB metabolites because starting materials with suitable substitution patterns are not readily available. Here, we report the novel synthesis of a variety of mono- and dimethoxyarene derivatives from commercially available fluoroarenes via nucleophilic aromatic substitution with sodium methoxide. This reaction provided good to excellent yields of the desired methoxylated products. Suzuki coupling of selected mono- and dimethoxy haloarenes with chlorinated phenylboronic acids yielded methoxylated derivatives of PCB 11, 12, 25, 35, and 36 in low to good yields. Crystal structures of 3,3'-dichloro-2,5-dimethoxy-1,1'-biphenyl and 3',5-dichloro-2,3-dimethoxy-1,1'-biphenyl confirmed the substitution pattern of both compounds. This synthesis strategy provides straightforward access to a range of mono- and dimethoxylated PCB derivatives that were not readily accessible previously.
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Affiliation(s)
- Ram Dhakal
- Department of Occupational and Environmental Health, College of Public Health, The University of Iowa, University of Iowa Research Park, #221 IREH, Iowa City, IA, 52242, USA
| | - Xueshu Li
- Department of Occupational and Environmental Health, College of Public Health, The University of Iowa, University of Iowa Research Park, #221 IREH, Iowa City, IA, 52242, USA
| | - Sean R Parkin
- Department of Chemistry, University of Kentucky, Lexington, KY, 40506, USA
| | - Hans-Joachim Lehmler
- Department of Occupational and Environmental Health, College of Public Health, The University of Iowa, University of Iowa Research Park, #221 IREH, Iowa City, IA, 52242, USA.
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7
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Ahmad K, Naseem HA, Parveen S, Shah HUR, Shah SSA, Shaheen S, Ashfaq A, Jamil J, Ahmad MM, Ashfaq M. Synthesis and spectroscopic characterization of medicinal azo derivatives and metal complexes of Indandion. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.126885] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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8
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Tran KT, Pallesen JS, Solbak SMØ, Narayanan D, Baig A, Zang J, Aguayo-Orozco A, Carmona RMC, Garcia AD, Bach A. A Comparative Assessment Study of Known Small-Molecule Keap1-Nrf2 Protein-Protein Interaction Inhibitors: Chemical Synthesis, Binding Properties, and Cellular Activity. J Med Chem 2019; 62:8028-8052. [PMID: 31411465 DOI: 10.1021/acs.jmedchem.9b00723] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Inhibiting the protein-protein interaction (PPI) between the transcription factor Nrf2 and its repressor protein Keap1 has emerged as a promising strategy to target oxidative stress in diseases, including central nervous system (CNS) disorders. Numerous non-covalent small-molecule Keap1-Nrf2 PPI inhibitors have been reported to date, but many feature suboptimal physicochemical properties for permeating the blood-brain barrier, while others contain problematic structural moieties. Here, we present the first side-by-side assessment of all reported Keap1-Nrf2 PPI inhibitor classes using fluorescence polarization, thermal shift assay, and surface plasmon resonance-and further evaluate the compounds in an NQO1 induction cell assay and in counter tests for nonspecific activities. Surprisingly, half of the compounds were inactive or deviated substantially from reported activities, while we confirm the cross-assay activities for others. Through this study, we have identified the most promising Keap1-Nrf2 inhibitors that can serve as pharmacological probes or starting points for developing CNS-active Keap1 inhibitors.
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Affiliation(s)
- Kim T Tran
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences , University of Copenhagen , Universitetsparken 2 , DK-2100 Copenhagen , Denmark
| | - Jakob S Pallesen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences , University of Copenhagen , Universitetsparken 2 , DK-2100 Copenhagen , Denmark
| | - Sara M Ø Solbak
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences , University of Copenhagen , Universitetsparken 2 , DK-2100 Copenhagen , Denmark
| | - Dilip Narayanan
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences , University of Copenhagen , Universitetsparken 2 , DK-2100 Copenhagen , Denmark
| | - Amina Baig
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences , University of Copenhagen , Universitetsparken 2 , DK-2100 Copenhagen , Denmark
| | - Jie Zang
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences , University of Copenhagen , Universitetsparken 2 , DK-2100 Copenhagen , Denmark
| | - Alejandro Aguayo-Orozco
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences , University of Copenhagen , Universitetsparken 2 , DK-2100 Copenhagen , Denmark
| | - Rosa M C Carmona
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences , University of Copenhagen , Universitetsparken 2 , DK-2100 Copenhagen , Denmark
| | - Anthony D Garcia
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences , University of Copenhagen , Universitetsparken 2 , DK-2100 Copenhagen , Denmark.,École Nationale Supérieure de Chimie de Rennes , 11 Allée de Beaulieu , CS 50837, Rennes Cedex 7 35708 , France
| | - Anders Bach
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences , University of Copenhagen , Universitetsparken 2 , DK-2100 Copenhagen , Denmark
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Kamble SS, Shankarling GS. Room temperature diazotization and coupling reaction using a DES-ethanol system: a green approach towards the synthesis of monoazo pigments. Chem Commun (Camb) 2019; 55:5970-5973. [PMID: 31062004 DOI: 10.1039/c9cc01114e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An environmentally benign, one-pot diazotization and coupling reaction using ChCl:tartaric acid DES at room temperature is described. The bulky tartrate ion renders stability to the diazonium salt at room temperature, also evidenced by 1H NMR. The isolated diazonium salt is stable and active even after 192 h at room temperature.
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Affiliation(s)
- Sujit Suresh Kamble
- Dyestuff Technology Department, Institute of Chemical Technology, N. P. Marg, Matunga, Mumbai-400019, India.
| | - Ganapati Subray Shankarling
- Dyestuff Technology Department, Institute of Chemical Technology, N. P. Marg, Matunga, Mumbai-400019, India.
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Filimonov VD, Krasnokutskaya EA, Kassanova AZ, Fedorova VA, Stankevich KS, Naumov NG, Bondarev AA, Kataeva VA. Synthesis, Structure, and Synthetic Potential of Arenediazonium Trifluoromethanesulfonates as Stable and Safe Diazonium Salts. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800887] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Victor D. Filimonov
- The Kizhner Research Center School of Advanced Manufacturing Technologies National Research Tomsk Polytechnic University 634050 Tomsk Russia
| | - Elena A. Krasnokutskaya
- The Kizhner Research Center School of Advanced Manufacturing Technologies National Research Tomsk Polytechnic University 634050 Tomsk Russia
| | - Assia Zh. Kassanova
- The Kizhner Research Center School of Advanced Manufacturing Technologies National Research Tomsk Polytechnic University 634050 Tomsk Russia
- S. Toraighyrov Pavlodar State University Pavlodar Kazakhstan
| | - Valentina A. Fedorova
- The Kizhner Research Center School of Advanced Manufacturing Technologies National Research Tomsk Polytechnic University 634050 Tomsk Russia
| | - Ksenia S. Stankevich
- The Kizhner Research Center School of Advanced Manufacturing Technologies National Research Tomsk Polytechnic University 634050 Tomsk Russia
| | - Nikolay G. Naumov
- Nikolaev Institute of Inorganic Chemistry 3 Acad. Lavrentiev pr. 630090 Novosibirsk Russia
- Novosibirsk State University Pirogova str.2 630090 Novosibirsk Russia
| | | | - Veronika A. Kataeva
- The Kizhner Research Center School of Advanced Manufacturing Technologies National Research Tomsk Polytechnic University 634050 Tomsk Russia
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11
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Trusova ME, Kutonova KV, Kurtukov VV, Filimonov VD, Postnikov PS. Arenediazonium salts transformations in water media: Coming round to origins. RESOURCE-EFFICIENT TECHNOLOGIES 2016. [DOI: 10.1016/j.reffit.2016.01.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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12
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Hinze ME, Daughtry JL, Lewis CA. Access to the Surugatoxin Alkaloids: Chemo-, Regio-, and Stereoselective Oxindole Annulation. J Org Chem 2015; 80:11258-65. [DOI: 10.1021/acs.joc.5b02053] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Meagan E. Hinze
- Department
of Chemistry and
Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Jessica L. Daughtry
- Department
of Chemistry and
Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Chad A. Lewis
- Department
of Chemistry and
Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
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