1
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Singh B, Kashyap S, Singh S, Gupta S, Ghorai MK. Catalytic Aminium Radical-Cation Salt (Magic Blue)-Initiated S N2-Type Nucleophilic Ring-Opening Transformations of Aziridines. J Org Chem 2024; 89:2247-2263. [PMID: 38323416 DOI: 10.1021/acs.joc.3c02194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
A simple and atom economic protocol for the construction of C-X/C-C bonds via catalytic aminium radical-cation salt (Magic Blue)-initiated SN2-type nucleophilic ring-opening transformations of racemic and nonracemic aziridines with different hetero and carbon nucleophiles to afford various amino ethers, thioethers, and amines in up to 99% yield, and with perfect enantiospecificity for some substrates but reduced ee with others (for nonracemic aziridines), is developed. This aminium radical-cation salt-initiated, SN2-type nucleophilic ring-opening strategy, along with various cyclization protocols, is employed to synthesize various biologically significant compounds.
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Affiliation(s)
- Bharat Singh
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Suraj Kashyap
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Shishir Singh
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Sikha Gupta
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Manas K Ghorai
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
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2
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Chen Y, Zhang S, Li T, Ma Q, Yuan Y, Jia X. Oxidants Controlled C-H Bond Functionalization of N-Aryltetrahydroisoquinolines: The Construction of the Quaternary Carbon Center and Cleavage of the C-N Bond. Chemistry 2024; 30:e202303151. [PMID: 37875461 DOI: 10.1002/chem.202303151] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 10/22/2023] [Accepted: 10/24/2023] [Indexed: 10/26/2023]
Abstract
Initiated by triarylamine radical cation salt (TBPA), the direct C-H bond functionalization of α-N-aryltetrahydroisoquinoline esters was smoothly realized, giving a series of α-hydroxylated derivatives with a quaternary carbon center in good yields. Differently, in the presence of tert-butyl nitrite (TBN), the C-N single bond was cleaved to keto esters. The mechanistic study revealed that these reactions were mediated by a similar mechanism, in which the N-nitrosation might provide a driving force to the C-N bond cleavage.
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Affiliation(s)
- Yuqin Chen
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, 225002, China
| | - Shuwei Zhang
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, 225002, China
| | - Tong Li
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, 225002, China
| | - Qiyuan Ma
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, 225002, China
| | - Yu Yuan
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, 225002, China
| | - Xiaodong Jia
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, 225002, China
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3
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Hidasová D, Slanina T. Triarylamminium Radical Cation Facilitates the Deprotection of tert-Butyl Groups in Esters, Ethers, Carbonates, and Carbamates. J Org Chem 2023. [PMID: 37126731 DOI: 10.1021/acs.joc.3c00238] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
We report a catalytic protocol for mild OtBu deprotection using two commercial reagents: the tris-4-bromophenylamminium radical cation, commonly known as magic blue (MB•+), and triethylsilane. Magic blue catalytically facilitates the cleavage of the C-O bond in tert-butyl carbamates, carbonates, esters, and ethers in a high isolated yield of up to 95%, and sacrificial triethylsilane accelerates the reaction. Without requiring high temperatures, transition metals, or strong acidic or basic catalysts, this method is suitable for structurally diverse compounds, including aliphatic, aromatic, and heterocyclic substrates.
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Affiliation(s)
- Denisa Hidasová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague, Czech Republic
| | - Tomáš Slanina
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague, Czech Republic
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4
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Wei HZ, Shi M, Wei Y. Visible-light-induced reactions of methylenecyclopropanes (MCPs). Chem Commun (Camb) 2023; 59:2726-2738. [PMID: 36752186 DOI: 10.1039/d2cc06957a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Diverse, visible-light-induced transformations of methylenecyclopropanes (MCPs) have been reported in recent years, attracting significant attention from synthetic chemists. As readily accessible strained molecules, MCPs have sufficient reactivity to selectively generate different target products, through reactions with various radical species upon visible-light irradiation under regulated reaction conditions. These transformations can be classified into three subcategories of reaction pathway, forming ring-opened products, cyclopropane derivatives, and alkynes. These products include pharmaceutical intermediates and polycyclic/heterocyclic compounds that are challenging to obtain using traditional methods. This review summarizes the recent advancements in this field.
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Affiliation(s)
- Hao-Zhao Wei
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Min Shi
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China. .,Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China.
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5
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Wang S, Ye Y, Hu Y, Meng X, Liu Z, Liu J, Chen K, Zhang Z, Zhang Y. Visible-light-induced C sp3-H functionalization of glycine derivatives by cerium catalysis. Chem Commun (Camb) 2023; 59:2628-2631. [PMID: 36762590 DOI: 10.1039/d2cc07071e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A Ce(III)-catalyzed, visible-light-induced aerobic oxidative dehydrogenative coupling/aromatization reaction between glycine derivatives and alkenes has been developed, which provides an efficient approach for the synthesis of quinoline derivatives and post-modification of oligopeptides containing glycine residues under mild conditions without the need for external photosensitizers.
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Affiliation(s)
- Shutao Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, P. R. China.
| | - Yanjie Ye
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, P. R. China.
| | - Yansong Hu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, P. R. China.
| | - Xu Meng
- First Hospital of Lanzhou University, Lanzhou University, China
| | - Zhao Liu
- First Hospital of Lanzhou University, Lanzhou University, China
| | - Jiyu Liu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, P. R. China.
| | - Kuan Chen
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, P. R. China.
| | - Zhengze Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, P. R. China.
| | - Yuan Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, P. R. China.
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6
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Ding H, Zhang S, Sun Z, Ma Q, Li Y, Yuan Y, Jia X. Tris(4-bromophenyl)aminium Hexachloroantimonate as a "Waste-Utilized"-Type Initiator-Promoted C-H Chlorination via C-H Activation Relay: Synthesis of Chlorinated Pyrroles. J Org Chem 2022; 87:15139-15151. [PMID: 36398528 DOI: 10.1021/acs.joc.2c01641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Using tris(4-bromophenyl)aminium hexachloroantimonate as a "waste-utilized"-type initiator, the aerobic oxidation of the sp3 C-H bond of proline esters was realized via C-H activation relay, giving a series of halogenated pyrroles in high yields. The mechanistic study revealed that the counterion, SbCl6-, was involved in the radical chlorination process, which provides a new way to understand the role of the counterions.
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Affiliation(s)
- Han Ding
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
| | - Shuwei Zhang
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
| | - Zheng Sun
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
| | - Qiyuan Ma
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
| | - Yuemei Li
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
| | - Yu Yuan
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
| | - Xiaodong Jia
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
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7
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Zhang X, Zuo T, Yu L. Ag/Se‐Catalyzed Selective Epoxidation of
β
‐Ionone with Molecular Oxygen. ChemistrySelect 2022. [DOI: 10.1002/slct.202203514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xu Zhang
- School of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225002 People's Republic of China
| | - Tingting Zuo
- School of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225002 People's Republic of China
| | - Lei Yu
- School of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225002 People's Republic of China
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8
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de Fátima Â, Fernandes SA, Ferreira de Paiva W, de Freitas Rego Y. The Povarov Reaction: A Versatile Method to Synthesize Tetrahydroquinolines, Quinolines and Julolidines. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1794-8355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AbstractThe multicomponent Povarov reaction represents a powerful approach for the construction of substances containing N-heterocyclic frameworks. By using the Povarov reaction, in addition to accessing tetrahydroquinolines, quinolines and julolidines in a single step, it is possible to form the following new bonds: two Csp
3–Csp
3 and one Csp
3–Nsp
3, two Csp
2–Csp
2 and one Csp
2–Nsp
2, and four Csp
3–Csp
3 and two Csp
3–Nsp
1, respectively. This short review discusses the main features of the Povarov reaction, including its mechanism, the reaction scope by employing different catalysts and substrates, as well as stereoselective versions.1 Introduction2 Mechanism of the Povarov Reaction3 Tetrahydroquinolines4 Quinolines5 Julolidines6 Concluding Remarks
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Affiliation(s)
- Ângelo de Fátima
- Departamento de Química, ICEx, Universidade Federal de Minas Gerais
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9
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Shen M, Xu Y, Zhang X, Fan X. Synthesis of Spirocyclopropylpyrazole Derivatives via the Cascade Reaction of Alkylidenecyclopropanes with Pyrazolidinones and Trifluoroethanol. Org Chem Front 2022. [DOI: 10.1039/d1qo01921j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel synthesis of spirocyclopropylpyrazole derivatives tethered with a trifluoromethyl unit through an unprecedented cascade reaction of alkylidenecyclopropanes with pyrazolidinones and trifluoroethanol (TFE) has been developed. Mechanistically, the reaction involves...
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10
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Li JZ, Mei L, Yu XC, Wang LT, Cai XE, Li T, Wei WT. C-centered radical-initiated cyclization by directed C(sp 3)–H oxidative functionalization. Org Chem Front 2022. [DOI: 10.1039/d2qo01128j] [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
C(sp3)–H functionalization is attracting constant attention. This review emphasizes C-centered radicals initiated cyclization strategies by directed C(sp3)–H oxidative functionalization since 2012.
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Affiliation(s)
- Jiao-Zhe Li
- Institute of Drug Discovery Technology, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
| | - Lan Mei
- Institute of Drug Discovery Technology, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
| | - Xuan-Chi Yu
- Institute of Drug Discovery Technology, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
| | - Ling-Tao Wang
- Institute of Drug Discovery Technology, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
| | - Xue-Er Cai
- Institute of Drug Discovery Technology, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
| | - Ting Li
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, Henan, 473061, China
| | - Wen-Ting Wei
- Institute of Drug Discovery Technology, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
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11
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Su Y, Zhang S, Yuan Y, Ma Q, Sun Z, Yuan Y, Jia X. SbCl 3 initiated conjunctive C-H bond functionalization and carbochlorination between glycine esters and methylenecyclopropanes (MCPs). Chem Commun (Camb) 2021; 57:9878-9881. [PMID: 34494034 DOI: 10.1039/d1cc03744g] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
In the presence of dioxygen, an antimony trichloride enabled conjunctive sp3 C-H bond functionalization and carbochlorination of glycines was realized, providing a series of chlorinated quinolines in high yields. The mechanistic study shows that the antimony(V) species might be involved in the oxidation of the sp3 C-H bond and is followed by carbochlorination through a radical intermediate.
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Affiliation(s)
- Yichun Su
- School of Chemistry & Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, 225002, China.
| | - Shuwei Zhang
- School of Chemistry & Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, 225002, China.
| | - Yuan Yuan
- School of Chemistry & Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, 225002, China.
| | - Qiyuan Ma
- School of Chemistry & Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, 225002, China.
| | - Zheng Sun
- School of Chemistry & Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, 225002, China.
| | - Yu Yuan
- School of Chemistry & Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, 225002, China.
| | - Xiaodong Jia
- School of Chemistry & Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, 225002, China.
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12
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Yu XX, Zhao P, Zhou Y, Huang C, Wang LS, Wu YD, Wu AX. Employing Arylacetylene as a Diene Precursor and Dienophile: Synthesis of Quinoline via the Povarov Reaction. J Org Chem 2021; 86:8381-8388. [PMID: 34106703 DOI: 10.1021/acs.joc.1c00793] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A novel I2-mediated Povarov reaction of arylacetylenes and anilines for the synthesis of 2,4-substituted quinolines has been developed, in which arylacetylene first acts as both a diene precursor and dienophile. This work further develops the Povarov reaction to expand the types of diene precursors. Preliminary mechanistic studies indicate that the I2/DMSO system realized the oxidative carbonylation of C(sp)-H of arylacetylene and then undergoes a [4 + 2] cycloaddition reaction.
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Affiliation(s)
- Xiao-Xiao Yu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Peng Zhao
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - You Zhou
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Chun Huang
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Li-Sheng Wang
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Yan-Dong Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - An-Xin Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
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13
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Yang L, Qiu Z, Wu J, Zhao J, Shen T, Huang X, Liu ZQ. Molecular Oxygen-Mediated Radical Alkylation of C(sp 3)-H Bonds with Boronic Acids. Org Lett 2021; 23:3207-3210. [PMID: 33821663 DOI: 10.1021/acs.orglett.1c00948] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A direct and site-specific alkylation of (sp3)C-H bond with aliphatic boronic acid was achieved. By simply heating glycinates and amines together with alkylboronic acids under an oxygen atmosphere, a variety of unnatural α-amino acids and peptides could be obtained in good yields.
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Affiliation(s)
- Le Yang
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Zhihong Qiu
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Jintao Wu
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Jianyou Zhao
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Tong Shen
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Xuan Huang
- Department of Laboratory Medicine, Affiliated Hospital of Jiangnan University, Wuxi 214122, China
| | - Zhong-Quan Liu
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
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14
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Zhu Z, Liu S, Hu Z, Xie Z, Tang J, Le Z. Visible‐Light‐Induced Aerobic Oxidative C
sp
3
−H Functionalization of Glycine Derivatives for 2‐Substituted Benzoxazoles. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100134] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Zhi‐Qiang Zhu
- Jiangxi Province Key Laboratory of Synthetic Chemistry School of Chemistry Biology and Material Science East China University of Technology Nanchang 330013 People's Republic of China
| | - Shan Liu
- Jiangxi Province Key Laboratory of Synthetic Chemistry School of Chemistry Biology and Material Science East China University of Technology Nanchang 330013 People's Republic of China
| | - Zhi‐Yu Hu
- Jiangxi Province Key Laboratory of Synthetic Chemistry School of Chemistry Biology and Material Science East China University of Technology Nanchang 330013 People's Republic of China
| | - Zong‐Bo Xie
- Jiangxi Province Key Laboratory of Synthetic Chemistry School of Chemistry Biology and Material Science East China University of Technology Nanchang 330013 People's Republic of China
| | - Juan Tang
- Ministry of Education Key Laboratory of Functional Small Organic Molecule Department of Chemistry and Chemical Engineering Jiangxi Normal University Nanchang 330022 People's Republic of China
| | - Zhang‐Gao Le
- Jiangxi Province Key Laboratory of Synthetic Chemistry School of Chemistry Biology and Material Science East China University of Technology Nanchang 330013 People's Republic of China
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15
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Liu S, Zhu ZQ, Hu ZY, Tang J, Yuan E. Copper-catalyzed oxidative cyclization of glycine derivatives toward 2-substituted benzoxazoles. Org Biomol Chem 2021; 19:1616-1619. [PMID: 33533370 DOI: 10.1039/d0ob02490b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A novel and straightforward intramolecular cyclization of glycine derivatives to 2-substituted benzoxazoles through copper-catalyzed oxidative C-H/O-H cross-coupling was described. A variety of glycine derivatives involving short peptides underwent cross-dehydrogenative-coupling readily to afford diverse 2-substituted benzoxazoles. The synthetic method has the advantages of simple operation, broad substrate scope and mild reaction conditions, thus providing an alternative effective approach for benzoxazole construction.
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Affiliation(s)
- Shan Liu
- Jiangxi Province Key Laboratory of Synthetic chemistry, School of Chemistry, Biology and Material Science, East China University of Technology, Nanchang 330013, China.
| | - Zhi-Qiang Zhu
- Jiangxi Province Key Laboratory of Synthetic chemistry, School of Chemistry, Biology and Material Science, East China University of Technology, Nanchang 330013, China.
| | - Zhi-Yu Hu
- Jiangxi Province Key Laboratory of Synthetic chemistry, School of Chemistry, Biology and Material Science, East China University of Technology, Nanchang 330013, China.
| | - Juan Tang
- Ministry of Education Key Laboratory of Functional Small Organic Molecule, Department of Chemistry and chemical engineering, Jiangxi Normal University, Nanchang 330022, China
| | - En Yuan
- College of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, China
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16
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Zhu ZQ, Guo D, Ji JJ, Zhu X, Tang J, Xie ZB, Le ZG. Visible-Light-Induced Dehydrogenative Imidoylation of Imidazo[1,2- a]pyridines with α-Amino Acid Derivatives and α-Amino Ketones. J Org Chem 2020; 85:15062-15071. [PMID: 33135893 DOI: 10.1021/acs.joc.0c01940] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new and efficient visible-light-promoted dehydrogenative cross-coupling reaction of imidazo[1,2-a]pyridines with α-amino carbonyl compounds toward imidoyl imidazo[1,2-a]pyridines is developed. A diverse range of imidazo[1,2-a]pyridines undergoes the dehydrogenative imidoylation smoothly with α-amino carbonyl compounds to access the corresponding products in satisfactory yields. We have also proposed the possible reaction mechanism based on preliminary mechanistic studies. The synthetic method has the advantages of wide substrate scope, good functional tolerance, and mild reaction conditions, which make this transformation more practical and sustainable.
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Affiliation(s)
- Zhi-Qiang Zhu
- Jiangxi Province Key Laboratory of Synthetic Chemistry, School of Chemistry, Biology and Materials Science, East China University of Technology, Nanchang 330013, China
| | - Dong Guo
- Jiangxi Province Key Laboratory of Synthetic Chemistry, School of Chemistry, Biology and Materials Science, East China University of Technology, Nanchang 330013, China
| | - Jiu-Jian Ji
- Jiangxi Province Key Laboratory of Synthetic Chemistry, School of Chemistry, Biology and Materials Science, East China University of Technology, Nanchang 330013, China
| | - Xiao Zhu
- Jiangxi Province Key Laboratory of Synthetic Chemistry, School of Chemistry, Biology and Materials Science, East China University of Technology, Nanchang 330013, China
| | - Juan Tang
- Ministry of Education Key Laboratory of Functional Small Organic Molecule, Department of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Zong-Bo Xie
- Jiangxi Province Key Laboratory of Synthetic Chemistry, School of Chemistry, Biology and Materials Science, East China University of Technology, Nanchang 330013, China
| | - Zhang-Gao Le
- Jiangxi Province Key Laboratory of Synthetic Chemistry, School of Chemistry, Biology and Materials Science, East China University of Technology, Nanchang 330013, China
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17
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Wei HZ, Li QZ, Wei Y, Shi M. Rapid construction of cyclopenta[ b]naphthalene frameworks from propargylic alcohol tethered methylenecyclopropanes. Org Biomol Chem 2020; 18:7396-7400. [PMID: 32930310 DOI: 10.1039/d0ob01732a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
We have developed a new synthetic methodology for the rapid construction of cyclopenta[b]naphthalene frameworks from the reaction of propargylic alcohol tethered methylenecyclopropanes with mesyl chloride in the presence of triethylamine through cascade cyclization. The reaction can be performed under mild conditions without the use of transition metals, affording the target products in moderate to good yields, and this cyclization reaction process can be scaled up to a gram-scale synthesis.
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Affiliation(s)
- Hao-Zhao Wei
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Quan-Zhe Li
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling-Ling Lu, Shanghai, 200032, China.
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China and State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling-Ling Lu, Shanghai, 200032, China.
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