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Roy S, Panja S, Sahoo SR, Chatterjee S, Maiti D. Enroute sustainability: metal free C-H bond functionalisation. Chem Soc Rev 2023; 52:2391-2479. [PMID: 36924227 DOI: 10.1039/d0cs01466d] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
The term "C-H functionalisation" incorporates C-H activation followed by its transformation. In a single line, this can be defined as the conversion of carbon-hydrogen bonds into carbon-carbon or carbon-heteroatom bonds. The catalytic functionalisation of C-H bonds using transition metals has emerged as an atom-economical technique to engender new bonds without activated precursors which can be considered as a major drawback while attempting large-scale synthesis. Replacing the transition-metal-catalysed approach with a metal-free strategy significantly offers an alternative route that is not only inexpensive but also environmentally benign to functionalize C-H bonds. Recently metal free synthetic approaches have been flourishing to functionalize C-H bonds, motivated by the search for greener, cost-effective, and non-toxic catalysts. In this review, we will highlight the comprehensive and up-to-date discussion on recent examples of ground-breaking research on green and sustainable metal-free C-H bond functionalisation.
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Affiliation(s)
- Sayan Roy
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Subir Panja
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Sumeet Ranjan Sahoo
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Sagnik Chatterjee
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India. .,Department of Interdisciplinary Program in Climate Studies, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India
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2
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Shinde RS, Narnawre AR, Karade NN. Metal-free Intramolecular Oxidative Cyclization of (Z)-2-Benzamido-3-arylacrylates Using I2/DMSO: Synthesis of 2,4,5-Trisubstituted Oxazoles. Tetrahedron Lett 2023. [DOI: 10.1016/j.tetlet.2023.154370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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3
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Xu H, Chen H, Hu X, Xuan G, Li P, Zhang Z. Synthesis of Fully Substituted 5-( o-Hydroxybenzoyl)imidazoles via Iodine-Promoted Domino Reaction of Aurones with Amidines. J Org Chem 2022; 87:16204-16212. [PMID: 36414000 DOI: 10.1021/acs.joc.2c01680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
An iodine-promoted domino reaction of aurones with amidines has been successfully explored. The reaction proceeds in a consecutive manner containing Michael addition, iodination, cyclization from intramolecular nucleophilic substitution, and dehydrogenative aromatization from spiro ring opening. Following this novel strategy, a variety of 1,2,4-trisubstituted 5-(o-hydroxybenzoyl)imidazoles were efficiently synthesized in moderate to good yields from readily available starting materials. A plausible mechanism has been proposed.
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Affiliation(s)
- Hui Xu
- Anhui Province Key Laboratory of Functional Coordinated Complexes for Materials Chemistry Application, and School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
| | - Hong Chen
- Anhui Province Key Laboratory of Functional Coordinated Complexes for Materials Chemistry Application, and School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
| | - Xiao Hu
- Anhui Province Key Laboratory of Functional Coordinated Complexes for Materials Chemistry Application, and School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
| | - Guang Xuan
- Anhui Province Key Laboratory of Functional Coordinated Complexes for Materials Chemistry Application, and School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
| | - Pinhua Li
- Anhui Province Key Laboratory of Functional Coordinated Complexes for Materials Chemistry Application, and School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
| | - Ze Zhang
- Anhui Province Key Laboratory of Functional Coordinated Complexes for Materials Chemistry Application, and School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
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4
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KI-TBHP mediated cascade oxidative annulations of enaminones: A facile approach towards 2, 4, 5-Trisubstituted oxazoles. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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5
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Tang P, Wen L, Ma HJ, Yang Y, Jiang Y. Synthesis of acyloxy-2 H-azirine and sulfonyloxy-2 H-azirine derivatives via a one-pot reaction of β-enamino esters, PIDA and carboxylic acid or sulfonic acid. Org Biomol Chem 2022; 20:3061-3066. [PMID: 35344576 DOI: 10.1039/d2ob00364c] [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
PIDA mediated oxidative acyloxylation/azirination and sulfonyloxylation/azirination of β-enamino esters were investigated. A series of functionalized acyloxy-2H-azirine and sulfonyloxy-2H-azirine derivatives was synthesized in moderate to good yields. This represents the first oxidative sulfonyloxylation/azirination of β-enamino esters with PIDA and sulfonic acid for access to sulfonyloxy-2H-azirine. Hypervalent iodine reagents enable cascade C-O/C-N bond formation. Furthermore, a possible reaction pathway was proposed based on the experimental results.
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Affiliation(s)
- Pan Tang
- School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China.
| | - Long Wen
- School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China.
| | - Hao-Jie Ma
- School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China.
| | - Yi Yang
- School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China.
| | - Yan Jiang
- School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China.
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6
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Zhao M, Yang Z, Yang D. Recent Progress in Synthesis of Polysubstituted Imidazoles by Cyclization Reaction. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202107014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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7
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Chen XY, Zhang X, Wan JP. Recent advances in transition metal-free annulation toward heterocycle diversity based on the C-N bond cleavage of enaminone platform. Org Biomol Chem 2022; 20:2356-2369. [DOI: 10.1039/d2ob00126h] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The enaminones and analogous stable enamines are well known as platform building blocks in organic synthesis for construction of heterocyclic compounds, especially N-heterocycles. To date, especially enaminones have been successfully...
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8
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Sun R, Yang X, Ge Y, Song J, Zheng X, Yuan M, Li R, Chen H, Fu H. Visible-Light-Induced Oxazoline Formations from N-Vinyl Amides Catalyzed by an Ion-Pair Charge-Transfer Complex. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01755] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Rui Sun
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, P. R. China
| | - Xiao Yang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, P. R. China
| | - Yicen Ge
- College of Materials, Chemistry and Chemical Engineering, Chengdu University of Technology, No.1 3rd Road, Erxian Bridge East, Chengdu, Sichuan 610059, P. R. China
| | - Jintong Song
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, P. R. China
| | - Xueli Zheng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, P. R. China
| | - Maolin Yuan
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, P. R. China
| | - Ruixiang Li
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, P. R. China
| | - Hua Chen
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, P. R. China
| | - Haiyan Fu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, P. R. China
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9
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Robidas R, Legault CY. Cyclic Haloiodanes: Syntheses, Applications and Fundamental Studies. Helv Chim Acta 2021. [DOI: 10.1002/hlca.202100111] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Raphaël Robidas
- Department of Chemistry Université de Sherbrooke Sherbrooke Québec J1K 2R1 Canada
| | - Claude Y. Legault
- Department of Chemistry Université de Sherbrooke Sherbrooke Québec J1K 2R1 Canada
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Gao P, Chen H, Bai ZJ, Zhang S, Zhao MN, Yang D, Li Y, Zhang J, Wang X. Iodine-Mediated Cyclization of Enamines to Imidazole-4-Carboxylic Derivatives with Sequential Removal of Nitrogen Atoms from TMSN 3. J Org Chem 2021; 86:10492-10500. [PMID: 34308649 DOI: 10.1021/acs.joc.1c01145] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
An iodine-mediated oxidative [4+1] cyclization of enamines with TMSN3 for the synthesis of 2,5-disubstituted imidazole-4-carboxylic derivatives has been developed. The mechanistic studies revealed that the reaction proceeds through a sequential removal of two nitrogen atoms from TMSN3. The synthetic utility was further demonstrated with a gram-scale reaction and various derivatization transformations of the products.
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Affiliation(s)
- Peng Gao
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji, Shaanxi 721013, P. R. China.,Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi'an 710127, P. R. China
| | - Huaijuan Chen
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji, Shaanxi 721013, P. R. China
| | - Zi-Jing Bai
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji, Shaanxi 721013, P. R. China
| | - Sheng Zhang
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji, Shaanxi 721013, P. R. China
| | - Mi-Na Zhao
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji, Shaanxi 721013, P. R. China
| | - Desuo Yang
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji, Shaanxi 721013, P. R. China
| | - Yingchun Li
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji, Shaanxi 721013, P. R. China
| | - Jiangwei Zhang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Dalian 116023, China
| | - Xiaomei Wang
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji, Shaanxi 721013, P. R. China
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11
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Chen J, Li Z, Suleman M, Wang Z, Lu P, Wang Y. TfOH-promoted synthesis of 4,5-dihydrooxazolo[5,4- c]isoquinolines via formal [3 + 2] cycloaddition of 4-diazoisoquinolin-3-one and benzonitriles. Org Biomol Chem 2020; 18:7671-7676. [PMID: 32966526 DOI: 10.1039/d0ob01748e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A facile and efficient method for the synthesis of novel 2-substituted 4-tosyl-4,5-dihydrooxazolo[5,4-c]isoquinolines from 4-diazoisoquinolin-3-ones and nitriles is reported. The reaction proceeded through a TfOH-promoted formal [3 + 2] cycloaddition and the products could be conveniently converted to 2-aryloxazolo[5,4-c]isoquinolines and the subsequent 2-(oxazolo[5,4-c]isoquinolin-2-yl)phenol which emitted bright green light in dilute dichloromethane solution and in solid form as well. Simple operation, metal-free and mild reaction conditions, short reaction time and broad substrate scope are the prominent features of this methodology.
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Affiliation(s)
- Junrong Chen
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China.
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12
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Allahresani A, Naghdi E, Ali Nasseri M. Catalytic activity of Co(II) Salen@KCC-1 on the synthesis of 2,4,5-triphenyl-1H-imidazoles and benzimidazoles. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2020.108137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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13
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Saito A, Togo H. Photochemical Transformation of O
-(β-Arylethyl) Arylimidates into 2,4-Diaryl-5-iodoxazoles with 1,3-Diiodo-5,5-dimethylhydantoin. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000383] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Aya Saito
- Graduate School of Science; Chiba University; Yayoi-cho 1-33 263-8522 Chiba Inage-ku Japan
| | - Hideo Togo
- Graduate School of Science; Chiba University; Yayoi-cho 1-33 263-8522 Chiba Inage-ku Japan
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14
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Xu K, Yang S, Ding Z. PhI(OAc)2-mediated oxidative rearrangement of allylic amides: efficient synthesis of oxazoles and β-keto amides. Org Chem Front 2020. [DOI: 10.1039/c9qo01298b] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A series of 2,5-disubstituted oxazoles and β-keto amides were synthesized from allylic amides via PhI(OAc)2-mediated intramolecular cyclization and oxidation with the migration of an aryl group.
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Affiliation(s)
- Kang Xu
- Jiangsu Key Laboratory of Drug Design and Optimization
- Department of Medicinal Chemistry
- School of Pharmacy
- China Pharmaceutical University
- Nanjing 211198
| | - Shuang Yang
- Jiangsu Key Laboratory of Drug Design and Optimization
- Department of Medicinal Chemistry
- School of Pharmacy
- China Pharmaceutical University
- Nanjing 211198
| | - Zhenhua Ding
- Jiangsu Key Laboratory of Drug Design and Optimization
- Department of Medicinal Chemistry
- School of Pharmacy
- China Pharmaceutical University
- Nanjing 211198
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