1
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Sharma A, Sharma S, Dutta S, Yadav S, Dixit R, Arora B, Mehta S, Srivastava A, Sharma RK. A simple and straightforward strategy for expedient access to benzoxazoles using chemically engineered 2D magnetic graphene oxide nanosheets as an eco-compatible catalyst. Dalton Trans 2023; 52:11303-11314. [PMID: 37530180 DOI: 10.1039/d3dt01265d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
Two-dimensional (2D) graphene oxide nanosheets serve as an excellent support material for immobilizing metal complexes to deal with the drawbacks of homogeneous catalysis. In this work, we report a magnetically retrievable graphene oxide (MGO) based copper nanocatalytic system that has been efficiently exploited for obtaining a series of pharmaceutically and biologically active benzoxazole scaffolds. The nanocatalyst was designed by covalent immobilization of dehydroacetic acid (DHA) onto a magnetic amino-silanized graphene oxide nanosupport which was accompanied by its metallation with copper acetate. The structure of the synthesized MGO hybrid material (Cu@DHA@APTES@MGO) was characterized by numerous physico-chemical techniques such as transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), vibrating sample magnetometry (VSM), elemental mapping, atomic absorption spectroscopy (AAS), thermogravimetric analysis (TGA), Brunauer-Emmett-Teller (BET) surface area analysis and energy-dispersive X-ray fluorescence spectroscopy (ED-XRF). The fabricated architectures exhibited high efficiency for cyclization of 2-aminophenols and β-diketones with wide substrate scope, excellent functional group tolerance, a higher conversion percentage (>98%) and a high turnover number (TON). The exceptional catalytic activity could be attributed to the 2D architecture of graphene oxide which provides space for trapping of reactants between 2D graphitic overlayers and metal surfaces and the reaction proceeds to afford benzoxazole products with moderate to excellent conversion percentages. Notably, this nanocomposite could be recovered easily through an external magnetic force and reused for multiple runs without any appreciable loss in its catalytic efficacy.
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Affiliation(s)
- Aditi Sharma
- Green Chemistry Network Centre, Department of Chemistry, University of Delhi, New Delhi-110007, India.
| | - Shivani Sharma
- Green Chemistry Network Centre, Department of Chemistry, University of Delhi, New Delhi-110007, India.
- Department of Chemistry, Ramjas College, University of, Delhi, Delhi-110007, India
| | - Sriparna Dutta
- Green Chemistry Network Centre, Department of Chemistry, University of Delhi, New Delhi-110007, India.
- Department of Chemistry, Hindu College, University of Delhi, Delhi-110007, India
| | - Sneha Yadav
- Green Chemistry Network Centre, Department of Chemistry, University of Delhi, New Delhi-110007, India.
- Department of Chemistry, Institute of Home Economics, University of Delhi, Delhi-110016, India
| | - Ranjana Dixit
- Department of Chemistry, Ramjas College, University of, Delhi, Delhi-110007, India
| | - Bhavya Arora
- Green Chemistry Network Centre, Department of Chemistry, University of Delhi, New Delhi-110007, India.
| | - Shilpa Mehta
- Department of Chemistry, Ramjas College, University of, Delhi, Delhi-110007, India
| | - Anju Srivastava
- Department of Chemistry, Hindu College, University of Delhi, Delhi-110007, India
| | - Rakesh K Sharma
- Green Chemistry Network Centre, Department of Chemistry, University of Delhi, New Delhi-110007, India.
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2
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Skrzypczak N, Pyta K, Bohusz W, Leśniewska A, Gdaniec M, Ruszkowski P, Schilf W, Bartl F, Przybylski P. Cascade Transformation of the Ansamycin Benzoquinone Core into Benzoxazole Influencing Anticancer Activity and Selectivity. J Org Chem 2023; 88:9469-9474. [PMID: 37276434 PMCID: PMC10337034 DOI: 10.1021/acs.joc.3c00493] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Indexed: 06/07/2023]
Abstract
The metal-free cascade transformation of geldanamycin benzoquinone core is proposed at relatively mild conditions. This approach yields new benzoxazole ansamycin antibiotics and enables their functionalization in an atom-economic manner, irrespective of the type of amine used. The analysis of the heterocyclization course reveals the dependence of its rate on the nature of the para-substituent within the benzylamine moiety (EDG/EWG) and the strength of the base. The reduction of the ansamycin core enables an increase in anticancer potency and selectivity.
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Affiliation(s)
- Natalia Skrzypczak
- Faculty
of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego
8, 61-614 Poznań, Poland
| | - Krystian Pyta
- Faculty
of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego
8, 61-614 Poznań, Poland
- Lebenswissenschaftliche
Fakultät, Institut für Biologie, Biophysikalische Chemie Humboldt-Universität zu Berlin, Invalidenstraße 42, 10115 Berlin, Germany
| | - Wiktor Bohusz
- Faculty
of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego
8, 61-614 Poznań, Poland
| | - Aleksandra Leśniewska
- Faculty
of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego
8, 61-614 Poznań, Poland
| | - Maria Gdaniec
- Faculty
of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego
8, 61-614 Poznań, Poland
| | - Piotr Ruszkowski
- Department
of Pharmacology, Poznań University
of Medical Sciences, Rokietnicka 5a, 60-806 Poznań, Poland
| | - Wojciech Schilf
- Institute
of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Franz Bartl
- Lebenswissenschaftliche
Fakultät, Institut für Biologie, Biophysikalische Chemie Humboldt-Universität zu Berlin, Invalidenstraße 42, 10115 Berlin, Germany
| | - Piotr Przybylski
- Faculty
of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego
8, 61-614 Poznań, Poland
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3
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Rodphon W, Jaithum K, Linkhum S, Thongsornkleeb C, Tummatorn J, Ruchirawat S. Synthesis of Naphtho[2,3- d]oxazoles via Ag(I) Acid-Mediated Oxazole-Benzannulation of ortho-Alkynylamidoarylketones. J Org Chem 2023. [PMID: 35786915 DOI: 10.1021/acs.joc.2c00940] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A cascade oxazole-benzannulation for the synthesis of naphtho[2,3-d]oxazoles has been developed employing ortho-alkynylamidoarylketones as substrates. This procedure provides the advantage of preparing a wide variety of substituents on naphtho[2,3-d]oxazole structures. In addition, o-alkynylamidoarylketones could be prepared from easily accessible and a wide variety of commercially available starting materials. Therefore, this method is a judicious choice of strategy to synthesize naphtho[2,3-d]oxazoles with a great variety of substituents. In this work, 27 examples were demonstrated to provide the desired products in moderate to good yields.
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Affiliation(s)
- Warabhorn Rodphon
- Program on Chemical Sciences, Center of Excellence on Environmental Health and Toxicology (EHT), Chulabhorn Graduate Institute, OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
| | - Kanokwan Jaithum
- Program on Chemical Sciences, Center of Excellence on Environmental Health and Toxicology (EHT), Chulabhorn Graduate Institute, OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
| | - Sutida Linkhum
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
| | - Charnsak Thongsornkleeb
- Program on Chemical Sciences, Center of Excellence on Environmental Health and Toxicology (EHT), Chulabhorn Graduate Institute, OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand.,Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
| | - Jumreang Tummatorn
- Program on Chemical Sciences, Center of Excellence on Environmental Health and Toxicology (EHT), Chulabhorn Graduate Institute, OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand.,Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
| | - Somsak Ruchirawat
- Program on Chemical Sciences, Center of Excellence on Environmental Health and Toxicology (EHT), Chulabhorn Graduate Institute, OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand.,Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
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4
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Jiang HM, Zhao YL, Sun Q, Ouyang XH, Li JH. Recent Advances in N-O Bond Cleavage of Oximes and Hydroxylamines to Construct N-Heterocycle. Molecules 2023; 28:molecules28041775. [PMID: 36838760 PMCID: PMC9964420 DOI: 10.3390/molecules28041775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 02/10/2023] [Accepted: 02/11/2023] [Indexed: 02/16/2023] Open
Abstract
Oximes and hydroxylamines are a very important class of skeletons that not only widely exist in natural products and drug molecules, but also a class of synthon, which have been widely used in industrial production. Due to weak N-O σ bonds of oximes and hydroxylamines, they can be easily transformed into other functional groups by N-O bond cleavage. Therefore, the synthesis of N-heterocycle by using oximes and hydroxylamines as nitrogen sources has attracted wide attention. Recent advances for the synthesis of N-heterocycle through transition-metal-catalyzed and radical-mediated cyclization classified by the type of nitrogen sources and rings are summarized. In this paper, the recent advances in the N-O bond cleavage of oximes and hydroxylamines are reviewed. We hope that this review provides a new perspective on this field, and also provides a reference to develop environmentally friendly and sustainable methods.
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Affiliation(s)
- Hui-Min Jiang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Yi-Lin Zhao
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Qing Sun
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Xuan-Hui Ouyang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
- Correspondence: (X.-H.O.); (J.-H.L.)
| | - Jin-Heng Li
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
- Correspondence: (X.-H.O.); (J.-H.L.)
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5
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Wu S, Geng F, Dong J, Liu L, Su L, Zhou Y. General and practical synthesis of naphtho[2,1-d]oxazoles from naphthols and amines. Org Chem Front 2022. [DOI: 10.1039/d2qo00557c] [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 general and practical synthesis of naphtho[2,1-d]oxazoles from readily available naphthols and amines is developed using TEMPO as the oxygen source with outstanding functional group tolerance, especially for the construction...
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6
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Aboonajmi J, Panahi F, Hosseini MA, Aberi M, Sharghi H. Iodine-catalyzed synthesis of benzoxazoles using catechols, ammonium acetate, and alkenes/alkynes/ketones via C–C and C–O bond cleavage. RSC Adv 2022; 12:20968-20972. [PMID: 35919129 PMCID: PMC9302334 DOI: 10.1039/d2ra03340b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Accepted: 07/08/2022] [Indexed: 11/21/2022] Open
Abstract
An efficient metal-free synthesis strategy of benzoxazoles was developed via coupling catechols, ammonium acetate, and alkenes/alkynes/ketones. The developed methodology represents an operationally simple, one-pot and large-scale procedure for the preparation of benzoxazole derivatives using molecular iodine as the catalyst. A metal-free one-pot multi-component method for the efficient synthesis of 2-aryl benzoxazoles via coupling of catechols, ammonium acetate and alkenes/alkynes/ketones using an I2–DMSO catalyst system is illustrated.![]()
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Affiliation(s)
- Jasem Aboonajmi
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran
| | - Farhad Panahi
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran
| | - Mina Aali Hosseini
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran
| | - Mahdi Aberi
- Department of Chemical and Materials Engineering, Faculty of Shahid Rajaee, Technical and Vocational University (TVU), Shiraz Branch, Shiraz, Iran
| | - Hashem Sharghi
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran
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7
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Abstract
A Cu-catalyzed straightforward synthesis of benzoxazoles from free phenols and cyclic oxime esters is reported. The mild reaction conditions tolerate various electron-withdrawing and electron-donating functional groups on both substrates, affording benzoxazoles in moderate to good yields. With this protocol, large-scale syntheses of Ezutromid and Flunoxaprofe in one or two steps are demonstrated. A catalytic mechanism, which includes Cu-catalyzed amination via inner-sphere electron transfer and consequent annulation, is proposed.
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Affiliation(s)
- Zheng-Hai Wang
- Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, University of Chinese Academy of Sciences, Shanghai Institute of Organic Chemistry, CAS, 345 Lingling Road, Shanghai 200032, China
| | - Dong-Hui Wang
- Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, University of Chinese Academy of Sciences, Shanghai Institute of Organic Chemistry, CAS, 345 Lingling Road, Shanghai 200032, China.,Department of Pharmacy, Nanjing University of Chinese Medicine, 138 Xianlin Boulevard, Nanjing 210023, China
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8
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Wu S, Zhou D, Geng F, Dong J, Su L, Zhou Y, Yin S. Metal‐Free Oxidative Condensation of Catechols, Aldehydes and NH
4
OAc towards Benzoxazoles. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100249] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Shaofeng Wu
- Advanced Catalytic Engineering Research Center of the Ministry of Education College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Dan Zhou
- Advanced Catalytic Engineering Research Center of the Ministry of Education College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Furong Geng
- Advanced Catalytic Engineering Research Center of the Ministry of Education College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Jianyu Dong
- Department of Educational Science Hunan First Normal University Changsha 410205 People's Republic of China
| | - Lebin Su
- Advanced Catalytic Engineering Research Center of the Ministry of Education College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Yongbo Zhou
- Advanced Catalytic Engineering Research Center of the Ministry of Education College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
| | - Shuang‐Feng Yin
- Advanced Catalytic Engineering Research Center of the Ministry of Education College of Chemistry and Chemical Engineering Hunan University Changsha 410082 People's Republic of China
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9
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Chen F, Zhu C, Jiang H. [3+1+1] Annulation Reaction of Benzo‐1,2‐Quinones, Aldehydes and Hydroxylamine Hydrochloride: Access to Benzoxazoles with Inorganic Nitrogen Source. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001521] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Fulin Chen
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 People's Republic of China
| | - Chuanle Zhu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 People's Republic of China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 People's Republic of China
- State Key Laboratory of Applied Organic Chemistry (Lanzhou University) Lanzhou 730000 People's Republic of China
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10
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Krylov IB, Segida OO, Budnikov AS, Terent'ev AO. Oxime‐Derived Iminyl Radicals in Selective Processes of Hydrogen Atom Transfer and Addition to Carbon‐Carbon π‐Bonds. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100058] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Igor B. Krylov
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Leninsky Prospekt 47 119991 Moscow Russian Federation
| | - Oleg O. Segida
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Leninsky Prospekt 47 119991 Moscow Russian Federation
| | - Alexander S. Budnikov
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Leninsky Prospekt 47 119991 Moscow Russian Federation
| | - Alexander O. Terent'ev
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Leninsky Prospekt 47 119991 Moscow Russian Federation
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11
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Adak L, Ghosh T. Recent Progress in Iron-Catalyzed Reactions Towards the Synthesis of Bioactive Five- and Six-Membered Heterocycles. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824999200714102103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Heterocyclic compounds are the largely diverse organic molecules and find
prevalent applications in the fine chemical industry, medicinal chemistry and agricultural
science. They are also among the most commonly bearing frameworks in numerous drugs
and pharmaceutical substances. Therefore, the development of convenient, efficient and
environmentally benign methods to produce various types of heterocyclic compounds is
an attractive area of research. For the synthesis and functionalization of heterocycles,
enormous achievements have been attributed over the past decades. Recently, ironcatalyzed
reactions have accomplished a noteworthy development in the synthesis of
heterocycles. This review highlights some remarkable achievements in the iron-catalyzed
synthesis of heterocyclic compounds published in the last five years.
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Affiliation(s)
- Laksmikanta Adak
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah 711103, India
| | - Tubai Ghosh
- Department of Chemistry, Jadavpur University, Raja S C Mullick Road, Jadavpur, Kolkata 700032, India
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12
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Prim D, Large B. C–H Functionalization Strategies in the Naphthalene Series: Site Selections and Functional Diversity. SYNTHESIS-STUTTGART 2020. [DOI: 10.1055/s-0040-1707855] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Naphthalene is certainly not a common arene. In contrast to benzene, the bicyclic feature of naphthalene offers multiple differentiable positions and thus a broad diversity of substitution patterns. Naphthalene is a central building block for the construction of elaborated polycyclic architectures with applications in broad domains such as life and materials sciences. As a result, C–H functionalization strategies specially designed for naphthalene substrates have become essential to install valuable substituents on one or both rings towards polysubstituted naphthalenes. This short review provides a focus on uncommon substitution patterns; however, classical ortho C–H activation is not covered.1 Introduction2 C–H Functionalization Using a Directing Group Located at Position 12.1 Functionalization on the Ring Bearing the DG: 1,3-Substitution Pattern2.2 Functionalization on the Ring Bearing the DG: 1,4-Substitution Pattern2.3 Functionalization on the Neighboring Ring: 1,6-, 1,7- and 1,8-Substitution Patterns3 C–H Functionalization Using a Directing Group Located at Position 23.1 Functionalization on the Ring Bearing the DG: 2,4- and 2,1-Substitution Patterns3.2 Miscellaneous Substitution Patterns4 Bis C–H Functionalization4.1 Symmetrical Bisfunctionalization: 1,2,8-Substitution Pattern4.2 Symmetrical Bisfunctionalization: 2,3,1-Substitution Pattern4.2 Unsymmetrical Bisfunctionalization: 2,3,1-Substitution Pattern4.3 Symmetrical Bisfunctionalization: 2,4,8-Substitution Pattern5 Conclusion and Outlook
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Affiliation(s)
- Damien Prim
- Université Paris-Saclay, UVSQ, CNRS, Institut Lavoisier de Versailles
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13
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Sharghi H, Aboonajmi J, Aberi M. One-Pot Multicomponent Reaction of Catechols, Ammonium Acetate, and Aldehydes for the Synthesis of Benzoxazole Derivatives Using the Fe(III)-Salen Complex. J Org Chem 2020; 85:6567-6577. [PMID: 32326700 DOI: 10.1021/acs.joc.0c00560] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The Fe(III)-salen complex has been applied successfully as a catalyst for the novel, simple, efficient, and one-pot multicomponent synthesis of benzoxazole derivatives from catechols, ammonium acetate as the nitrogen source, and aldehydes (nontoxic and cheap alternatives of amines) for the first time. Using this procedure, a wide range of benzoxazoles was successfully synthesized in the presence of a catalyst in EtOH under mild conditions, and all products were obtained in excellent yields. To the best of our knowledge, this method is the first example of the multicomponent synthesis of benzoxazole derivatives using these starting materials. The notable features such as the use of air that is considered as a benign oxidant and EtOH as a green solvent, ease of product separation, readily available and inexpensive aldehydes, and mild conditions make our procedure more efficient and practical for organic synthesis. Moreover, the current protocol is successfully applied to synthesize desirable products on a large scale.
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Affiliation(s)
- Hashem Sharghi
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran
| | - Jasem Aboonajmi
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran
| | - Mahdi Aberi
- Department of Chemical and Materials Engineering, Faculty of Shahid Rajaee, Shiraz Branch, Technical and Vocational University (TVU), Shiraz 71777, Iran
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14
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Tang J, Cao Y, Ruan F, Li F, Jin Y, Ha MN, Han X, Ke Q. New Approach for Controllable Synthesis of N-MnO x Microflowers and Their Superior Catalytic Performance for Benzoxazole Synthesis. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c00746] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Jun Tang
- College of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, Anhui, P. R. China
| | - Yali Cao
- College of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, Anhui, P. R. China
| | - Fei Ruan
- College of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, Anhui, P. R. China
| | - Fengfeng Li
- College of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, Anhui, P. R. China
| | - Yangxin Jin
- College of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, Anhui, P. R. China
| | - Minh Ngoc Ha
- College of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, Anhui, P. R. China
| | - Xinya Han
- College of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, Anhui, P. R. China
| | - Qingping Ke
- College of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, Anhui, P. R. China
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15
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Anderson K, Eastabrook AS, Sperry J. One-pot oxidative hydrolysis-oxidative cleavage of 7-borylindoles enables access to o-amidophenols and 4-acylbenzoxazoles. Chem Commun (Camb) 2020; 56:3559-3562. [PMID: 32104796 DOI: 10.1039/c9cc09807k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
7-Borylindoles undergo a one-pot oxidative-hydrolysis of the arylboronate and oxidative cleavage of the indole C2-C3 double bond to afford o-amidophenol derivatives. Subsequent cyclisation delivers benzoxazoles bearing an acyl group at C4, a substitution pattern common to fungal-derived benzoxazole alkaloids. Using 7-borylindoles as substrates to access functionalised o-amidophenols circumvents the difficult preparation of these compounds from arenes, streamlining access to substituted 4-acylbenzoxazoles in the process.
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Affiliation(s)
- Kirsty Anderson
- School of Chemical Sciences, University of Auckland, 23 Symonds Street, Auckland, New Zealand.
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16
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Henry MC, Abbinante VM, Sutherland A. Iron-Catalyzed Regioselective Synthesis of 2-Arylbenzoxazoles and 2-Arylbenzothiazoles via Alternative Reaction Pathways. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000014] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Martyn C. Henry
- WestCHEM, School of Chemistry; The Joseph Black Building; University of Glasgow; G12 8QQ Glasgow United Kingdom
| | - Vincenzo Mirco Abbinante
- WestCHEM, School of Chemistry; The Joseph Black Building; University of Glasgow; G12 8QQ Glasgow United Kingdom
| | - Andrew Sutherland
- WestCHEM, School of Chemistry; The Joseph Black Building; University of Glasgow; G12 8QQ Glasgow United Kingdom
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17
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Luo Z, Wu H, Li Y, Chen Y, Nie J, Lu S, Zhu Y, Zeng Z. Cesium Fluoride and Copper‐Catalyzed One‐Pot Synthesis of Benzoxazoles
via
a Site‐Selective Amide C−N Bond Cleavage. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900485] [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)
- Zhongfeng Luo
- College of Chemistry and Environment South China Normal University Guangzhou 510006 People's Republic of China
| | - Hongxiang Wu
- College of Chemistry and Environment South China Normal University Guangzhou 510006 People's Republic of China
| | - Yue Li
- College of Chemistry and Environment South China Normal University Guangzhou 510006 People's Republic of China
| | - Yuwen Chen
- College of Chemistry and Environment South China Normal University Guangzhou 510006 People's Republic of China
| | - Jingyi Nie
- College of Chemistry and Environment South China Normal University Guangzhou 510006 People's Republic of China
| | - Siqi Lu
- College of Chemistry and Environment South China Normal University Guangzhou 510006 People's Republic of China
| | - Yulin Zhu
- College of Chemistry and Environment South China Normal University Guangzhou 510006 People's Republic of China
| | - Zhuo Zeng
- College of Chemistry and Environment South China Normal University Guangzhou 510006 People's Republic of China
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry Chinese Academy of Science 345 Lingling Road Shanghai 200032 People's Republic of China
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18
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Meng H, Gao S, Luo M, Zeng X. Iron and Phenol Co-Catalysis for Rapid Synthesis of Nitriles under Mild Conditions. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900831] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Hong Meng
- Key Laboratory of Green Chemistry and Technology (MOE); College of Chemistry; Sichuan University; 610064 Chengdu People's Republic of China
| | - Sen Gao
- Key Laboratory of Green Chemistry and Technology (MOE); College of Chemistry; Sichuan University; 610064 Chengdu People's Republic of China
| | - Meiming Luo
- Key Laboratory of Green Chemistry and Technology (MOE); College of Chemistry; Sichuan University; 610064 Chengdu People's Republic of China
| | - Xiaoming Zeng
- Key Laboratory of Green Chemistry and Technology (MOE); College of Chemistry; Sichuan University; 610064 Chengdu People's Republic of China
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19
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Building molecular complexity through transition-metal-catalyzed oxidative annulations/cyclizations: Harnessing the utility of phenols, naphthols and 1,3-dicarbonyl compounds. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2018.11.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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20
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Patra A, James A, Das TK, Biju AT. Oxidative NHC Catalysis for the Generation of Imidoyl Azoliums: Synthesis of Benzoxazoles. J Org Chem 2018; 83:14820-14826. [DOI: 10.1021/acs.joc.8b02598] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Atanu Patra
- Organic Chemistry Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune 411008, India
| | - Anjima James
- Organic Chemistry Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune 411008, India
| | - Tamal Kanti Das
- Organic Chemistry Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune 411008, India
| | - Akkattu T. Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
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21
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Chen WL, Wu SY, Mo XL, Wei LX, Liang C, Mo DL. Synthesis of 2-Aminobenzonitriles through Nitrosation Reaction and Sequential Iron(III)-Catalyzed C–C Bond Cleavage of 2-Arylindoles. Org Lett 2018; 20:3527-3530. [DOI: 10.1021/acs.orglett.8b01294] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Wei-Li Chen
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin, 541004, China
| | - Si-Yi Wu
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin, 541004, China
| | - Xue-Ling Mo
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin, 541004, China
| | - Liu-Xu Wei
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin, 541004, China
| | - Cui Liang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin, 541004, China
| | - Dong-Liang Mo
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China; School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, 15 Yu Cai Road, Guilin, 541004, China
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22
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Jia L, Tang Q, Luo M, Zeng X. Direct ortho-Selective Amination of 2-Naphthol and Its Analogues with Hydrazines. J Org Chem 2018; 83:5082-5091. [PMID: 29644862 DOI: 10.1021/acs.joc.8b00421] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Described herein is a regioselective ortho-amination of 2-naphthol and its analogues with substituted hydrazines. It provides a direct methodology for the synthesis of N-arylaminated naphthol derivatives without the formation of related 1,1'-biaryl-2,2'-diamine or carbazole byproducts. Specifically, using N, N-disubstituted hydrazine precursors, N-unsubstituted ortho-aminated derivatives and related secondary amines can be formed in ethylene glycol in moderate to excellent yields. Variation of substrates to N, N'-diarylhydrazines and N-methyl- N, N'-diarylhydrazines led to N-aryl-1-amino-2-naphthol compounds. It is noted that biologically interesting indazole motifs can be facilely created by the reaction of N, N'-dialkylhydrazines with 2-naphthols. These ortho-amination reactions have the advantage of one-pot operation without the use of transition metal catalysts.
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Affiliation(s)
- Lei Jia
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , PR China
| | - Qiang Tang
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , PR China.,College of Pharmacy , Chongqing Medical University , Chongqing 400016 , PR China
| | - Meiming Luo
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , PR China
| | - Xiaoming Zeng
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , PR China
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23
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Access to Amidines and Arylbenzimidazoles: Zinc-Promoted Rearrangement of Oxime Acetates. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701490] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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