1
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Cui HL. Recent advances in oxidative chlorination. Org Biomol Chem 2024; 22:1580-1601. [PMID: 38312070 DOI: 10.1039/d3ob02012f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2024]
Abstract
Considering the wide occurrence and extensive application of organic chlorides in many research fields, the development of easy, practical and green chlorination methodologies is much needed. In the oxidative chlorination strategy, active chlorinating species can be in situ formed by the interaction of easily accessible chlorides such as NaCl, HCl, KCl, CHCl3, etc. and suitable oxidants. Among the established chlorination approaches, this strategy is an attractive one as it features the use of readily available, cheap and safe inorganic or organic chlorides, good atom economy of chlorine, and multiple choices of oxidants. This review summarizes the representative methodologies in the field of oxidative chlorination, covering 2013 to 2023.
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Affiliation(s)
- Hai-Lei Cui
- Laboratory of Asymmetric Synthesis, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, 319 Honghe Ave., Yongchuan, Chongqing, 402160, PR China.
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2
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Paul S, Choudhuri T, Das S, Pratap R, Bagdi AK. Tunable Regioselective Allylic Alkylation/Iodination of Imidazoheterocycles in Water. J Org Chem 2024; 89:1492-1504. [PMID: 38215401 DOI: 10.1021/acs.joc.3c02091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2024]
Abstract
The switchable roles of allylic alcohol and molecular iodine as reagents and catalysts have been demonstrated in the regioselective allylic alkylation and iodination of imidazoheterocycles employing the mixture of allylic alcohol-I2. First, we have explored the catalytic activity of iodine for the allylation of imidazoheterocycles using allylic alcohol in an aqueous medium. The allylation of a library of imidazoheterocycles and other electron-rich heterocycles like indole, pyrazole, 4-hydroxy coumarin, and 6-amino uracil has been achieved by employing this methodology. The efficiency of the I2 catalyst for N-allylation of azoles has also been demonstrated. Next, we have shown that this mixture of allylic alcohol and I2 could be beneficial for the iodination of imidazoheterocycles under room temperature. Mechanistic studies indicate that the activation of allylic alcohol by molecular iodine took place probably through halogen bonding, and NMR studies show that the reaction did not proceed through allylic ether formation.
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Affiliation(s)
- Suvam Paul
- Department of Chemistry, University of Kalyani, Kalyani 741235, India
| | | | - Sourav Das
- Department of Chemistry, University of Kalyani, Kalyani 741235, India
| | - Ramendra Pratap
- Department of Chemistry, University of Delhi, New Delhi 110007, India
| | - Avik Kumar Bagdi
- Department of Chemistry, University of Kalyani, Kalyani 741235, India
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3
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Sikdar P, Choudhuri T, Paul S, Das S, Bagdi AK. K 2S 2O 8-Promoted Consecutive Tandem Cyclization/Oxidative Halogenation: Access to 3-Halo-Pyrazolo[1,5- a]pyrimidines. ACS OMEGA 2023; 8:23851-23859. [PMID: 37426282 PMCID: PMC10323951 DOI: 10.1021/acsomega.3c02270] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 06/09/2023] [Indexed: 07/11/2023]
Abstract
A one-pot methodology has been developed to synthesize 3-halo-pyrazolo[1,5-a]pyrimidine derivatives through the three-component reaction of amino pyrazoles, enaminones (or chalcone), and sodium halides. The use of easily accessible 1,3-biselectrophilic reagents like enaminones and chalcone offers a straightforward approach for the synthesis of 3-halo-pyrazolo[1,5-a]pyrimidines. The reaction proceeded through a cyclocondensation reaction between amino pyrazoles with enaminones/chalcone in the presence of K2S2O8 followed by oxidative halogenations by NaX-K2S2O8. Mild and environmentally benign reaction conditions, wide functional group tolerance, and scalability of the reaction are the attractive facet of this protocol. The combination of NaX-K2S2O8 is also beneficial for the direct oxidative halogenations of pyrazolo[1,5-a]pyrimidines in water.
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4
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Tang J, Zhao C, Li S, Zhang J, Zheng X, Yuan M, Fu H, Li R, Chen H. Tandem Ring-Contraction/Regioselective C-H Iodination Reaction of Pyridinium Salts. J Org Chem 2023. [PMID: 36757877 DOI: 10.1021/acs.joc.2c02472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
A facile route for direct access to the 4-iodopyrrole-2-carbaldehydes from pyridinium salts has been successfully developed, which undergoes cascade pyrrole-2-carbaldehydes construction/selective C4 position iodination process. Using Na2S2O8 as an oxidant and readily available sodium iodide as an iodine source, a variety of 4-iodopyrrole-2-carbaldehydes were obtained in good to excellent yields. Atom- and step-economy, good functional group tolerance, high regioselectivity, as well as mild conditions entail this transformation an alternative strategy for enriching pyrroles library.
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Affiliation(s)
- Juan Tang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, P. R. China.,Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, P. R. China
| | - Chaoqun Zhao
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, P. R. China.,Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, P. R. China
| | - Shun Li
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, P. R. China.,Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, P. R. China
| | - Jing Zhang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education College of Chemistry, Sichuan University, Chengdu 610064, P. R. China.,Analytical & Testing Center, 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 610064, P. R. China.,Analytical & Testing Center, 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 610064, P. R. China.,Analytical & Testing Center, 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 610064, P. R. China.,Analytical & Testing Center, 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 610064, P. R. China.,Analytical & Testing Center, 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 610064, P. R. China.,Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, P. R. China
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5
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Lu Y, Zhang J, Duan X, Yang B, Zhao C, Gu L, Chen C, Zhu H, Ye Y, Luo Z, Zhang Y. K 2S 2O 8-Mediated Radical Cyclization of 1,6-Enyne for the Synthesis of Diiodonated γ-Lactams. J Org Chem 2023; 88:2393-2403. [PMID: 36715636 DOI: 10.1021/acs.joc.2c02818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A novel and convenient K2S2O8-mediated diiodo cyclization of 1,6-enynes for the facile synthesis of functionalized γ-lactam derivatives has been developed. This reaction features mild and transition-metal-free conditions, which offer a green and efficient entry to synthetically important γ-lactam scaffolds. Mechanistic studies suggest that iodide radicals initiate the cascade cyclic transformation.
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Affiliation(s)
- Yuling Lu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation. School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, P. R. of China
| | - Jiale Zhang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation. School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, P. R. of China
| | - Xianxian Duan
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation. School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, P. R. of China
| | - Boyi Yang
- Department of Forensic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Chunhua Zhao
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation. School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, P. R. of China
| | - Lianghu Gu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation. School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, P. R. of China
| | - Chunmei Chen
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation. School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, P. R. of China
| | - Hucheng Zhu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation. School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, P. R. of China
| | - Ying Ye
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation. School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, P. R. of China
| | - Zengwei Luo
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation. School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, P. R. of China
| | - Yonghui Zhang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation. School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, P. R. of China
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6
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Latha Duda M, Velidandi A. Halogenation followed by Deformylation of 3-Formylchromones: A Novel Approaches for Synthesis of 3-Halochromones with Oxone and NaX. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
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7
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Wen T, Liang B, Liang J, Wang D, Shi J, Xu S, Zhu W, Chen X, Zhu Z. Copper-Promoted N-Alkylation and Bromination of Arylamines/Indazoles Using Alkyl Bromides as Reagents for Difunctionalization. J Org Chem 2022; 87:12214-12224. [PMID: 36053202 DOI: 10.1021/acs.joc.2c01356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Practical copper-promoted N-alkylation and bromination of arylamines/indazoles with alkyl bromides are described; the N-alkylation-C-4-bromination and N-dialkylation-C-4-bromination of arylamines, and N-alkylation-C-3-bromination of indazoles, with alkyl bromides have been analyzed. The full use of alkyl bromides as alkylating and brominating building blocks without atom wastage, indicating excellent atom and step economy, has been highlighted. Eco-friendly oxygen and water are the reaction oxidant and byproduct, respectively.
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Affiliation(s)
- Tingting Wen
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Baihui Liang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Jiacheng Liang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Dongyi Wang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Jianyi Shi
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Shengting Xu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Weidong Zhu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Xiuwen Chen
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Zhongzhi Zhu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
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8
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Li W, Liu J, Zhou M, Ma L, Zhang M. Visible light-enabled regioselective chlorination of coumarins using CuCl 2via LMCT excitation. Org Biomol Chem 2022; 20:6667-6672. [PMID: 35943174 DOI: 10.1039/d2ob01134d] [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
An efficient, regioselective chlorination of coumarins using Earth-abundant and cost-effective CuCl2 under visible light irradiation is reported. A key feature of this protocol is the photocatalytic dissociation of the copper(II) complex in acetonitrile through ligand-to-metal charge transfer (LMCT) to give the chlorine atom which then selectively chlorinates the coumarin. This method can chlorinate a broad scope of coumarins with either electron-withdrawing or electron-donating substituents to regioselectively afford 3-chlorocoumarins in good to excellent yields and can be further extended to other electron-deficient heterocycles and olefins such as flavones, 8-methoxypsoralen and naphthoquinones.
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Affiliation(s)
- Weiming Li
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China.
| | - Jinshan Liu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China.
| | - Min Zhou
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China.
| | - Lin Ma
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China.
| | - Min Zhang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China.
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9
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Dai PF, Xu H. Novel Chlorination of Imidazo‐Fused Heterocycles via Dichloro(aryl)‐λ3‐iodanes. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200779] [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)
- Peng-Fei Dai
- First Affiliated Hospital of Anhui Medical University Department of Nuclear Medicine 218 Jixi Road 230022 Hefei CHINA
| | - Huiqin Xu
- First Affiliated Hospital of Anhui Medical University Department of Nuclear Medicine 230022 NanJing CHINA
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10
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Sen PP, Roy VJ, Raha Roy S. Electrochemical Activation of the C-X Bond on Demand: Access to the Atom Economic Group Transfer Reaction Triggered by Noncovalent Interaction. J Org Chem 2022; 87:9551-9564. [PMID: 35816013 DOI: 10.1021/acs.joc.2c00529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An atom economic method demonstrates the involvement of noncovalent interaction via hydrogen or halogen bonding interaction in triggering paired electrolysis for the group transfer reactions. Specifically, this method demonstrated the bromination of several aromatic and heteroaromatic compounds through the activation of the C(sp3)-Br bond of organic-bromo derivatives on demand. This electrochemical protocol is mild, and mostly no additional electrolyte is needed, which makes the workup process straightforward. Unlike the existing regioselective monobromination methods, this work utilizes a relatively small amount (1.2 equiv) of bromine surrogates that releases bromine on demand under the electrochemical condition and after completion of the reaction generates acetophenone as a useful byproduct. Green metrics indicate this protocol has a very good atom efficiency with an E-factor of 26.86 kg of waste/1 kg of product. In addition to the scale-up process, this strategy could be extended to the transfer of chlorine and thioaryl units. An extensive mechanistic study is accomplished to validate the hypothesis of noncovalent interaction using computational, spectroscopic, and cyclic voltammetry studies. Finally, the applicability of this newly developed nonbonding interaction to trigger paired electrolysis was extended to the chemoselective debromination of several dihalo organic compounds.
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Affiliation(s)
- Partha Pratim Sen
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Vishal Jyoti Roy
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Sudipta Raha Roy
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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11
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Chen H, Wang Y, Liu Q, Guo Y, Cao S, Zhao Y. Synthesis and evaluation of photophysical properties of C‐3 halogenated derivatives of 2‐phenylimidazo[1,2‐
a
]pyridine. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202200224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hong Chen
- College of Chemistry Zhengzhou University Zhengzhou 450001 P.R. China
| | - Yanyan Wang
- College of Chemistry Zhengzhou University Zhengzhou 450001 P.R. China
| | - Qingjie Liu
- College of Chemistry Zhengzhou University Zhengzhou 450001 P.R. China
| | - Yanchun Guo
- College of Chemistry Zhengzhou University Zhengzhou 450001 P.R. China
| | - Shuxia Cao
- College of Chemistry Zhengzhou University Zhengzhou 450001 P.R. China
| | - Yufen Zhao
- College of Chemistry Zhengzhou University Zhengzhou 450001 P.R. China
- Institute Drug Discovery Technology Ningbo University Ningbo 315211 P.R. China
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12
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Van Kerrebroeck R, Horsten T, Stevens CV. BROMIDE OXIDATION: A SAFE STRATEGY FOR ELECTROPHILIC BROMINATIONS. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200310] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Tomas Horsten
- Ghent University: Universiteit Gent Green Chemistry and Technology BELGIUM
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13
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Xu H, Hu L, Zhu G, Zhu Y, Wang Y, Wu ZG, Zi Y, Huang W. DABCO as a practical catalyst for aromatic halogenation with N-halosuccinimides. RSC Adv 2022; 12:7115-7119. [PMID: 35424677 PMCID: PMC8982236 DOI: 10.1039/d2ra00197g] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 02/23/2022] [Indexed: 11/21/2022] Open
Abstract
A simple and practical synthetic approach for synthesis of aromatic halides is developed. Simple Lewis base, DABCO, is used as the catalyst. This arene halogenation process proceedes conveniently and efficiently at ambient conditions, providing the desired products in good to excellent yields and selectivity.
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Affiliation(s)
- Haiyan Xu
- Nantong Normal College Nantong 226010 Jiangsu P. R. China
| | - Lanping Hu
- School of Chemistry and Chemical Engineering, Nantong University Nantong 226019 Jiangsu P. R. China
| | - Guanghua Zhu
- School of Chemistry and Chemical Engineering, Nantong University Nantong 226019 Jiangsu P. R. China
| | - Yueping Zhu
- Nantong Normal College Nantong 226010 Jiangsu P. R. China
| | - Yang Wang
- School of Chemistry and Chemical Engineering, Nantong University Nantong 226019 Jiangsu P. R. China
| | - Zheng-Guang Wu
- School of Chemistry and Chemical Engineering, Nantong University Nantong 226019 Jiangsu P. R. China
| | - You Zi
- School of Chemistry and Chemical Engineering, Nantong University Nantong 226019 Jiangsu P. R. China
| | - Weichun Huang
- School of Chemistry and Chemical Engineering, Nantong University Nantong 226019 Jiangsu P. R. China
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14
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Recent advances in transition-metal-free C–H functionalization of imidazo[1,2-a]pyridines. GREEN SYNTHESIS AND CATALYSIS 2022. [DOI: 10.1016/j.gresc.2022.03.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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15
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Chen J, Wen K, Wu Y, Shi J, Yao X, Tang X. Transition Metal Catalyst-Free C-3 Sulfonylmethylation of Imidazo[1,2- a]pyridines with Glyoxylic Acid and Sodium Sulfinates in Water. J Org Chem 2022; 87:3780-3787. [PMID: 35133825 DOI: 10.1021/acs.joc.1c02856] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein, we describe an efficient and benign protocol for direct C-3 sulfonylmethylation of imidazo[1,2-a]pyridines with glyoxylic acid and sodium sulfinates. Various sulfonylmethylated imidazo[1,2-a]pyridines were synthesized in water under transition metal catalyst-free conditions. This multicomponent reaction featured available substrates, good functional group tolerance, moderate to excellent yields, and mild reaction conditions.
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Affiliation(s)
- Jiewen Chen
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, 1023 South Shatai Road, Baiyun District, Guangzhou 510515, People's Republic of China
| | - Kangmei Wen
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, 1023 South Shatai Road, Baiyun District, Guangzhou 510515, People's Republic of China
| | - Yinrong Wu
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, 1023 South Shatai Road, Baiyun District, Guangzhou 510515, People's Republic of China
| | - Jie Shi
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, 1023 South Shatai Road, Baiyun District, Guangzhou 510515, People's Republic of China
| | - Xingang Yao
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, 1023 South Shatai Road, Baiyun District, Guangzhou 510515, People's Republic of China
| | - Xiaodong Tang
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, 1023 South Shatai Road, Baiyun District, Guangzhou 510515, People's Republic of China
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16
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Jalani HB, Jeong J. p‐
Toluenesulfonic
acid Catalyzed,
Isocyanide‐Free
,
Groebke‐Blackburn‐Bienayme
(
GBB
) Type Multicomponent Synthesis of
3‐Anilino
‐imdazo[1,2‐a]pyridines. J Heterocycl Chem 2022. [DOI: 10.1002/jhet.4456] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Hitesh B. Jalani
- College of Pharmacy Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak‐ro, Yeonsu‐gu Incheon South Korea
- Smart BioPharm, 310‐Pilotplant, Incheon Techno‐Park, 12‐Gaetbeol‐ro, Yeonsu‐gu Incheon South Korea
| | - Jin‐Hyun Jeong
- College of Pharmacy Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak‐ro, Yeonsu‐gu Incheon South Korea
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17
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Chen X, Zhang Z, Sun T, Cai H, Gao Y, Cai T, Shang T, Luo Y, Yu G, Shen H, Wu G, Hei Y, Li E, Fan G. Oxone®-mediated halocyclization/demethylation of 2-alkynylthioanisoles with sodium halides towards 3-halobenzo[b]thiophenes. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2021.153614] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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18
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Qiao H, Yang L, Sun W, Chen Y, Wang J, Wang Y, Dong H. Metal-Free C3-H Hydrazination of Imidazo[1,2-a]pyridine with Azodiformates in Water at Room Temperature. HETEROCYCLES 2022. [DOI: 10.3987/com-21-14576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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19
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Qiao H, Yang L, Chen Y, Wang J, Sun W, Dong H, Wang Y. An Efficient Three-Component Tandem Approach for the Synthesis of Imidazoheterocycle-Hydrazine Derivatives under Mild Conditions. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202110015] [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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20
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Das S, Singh B, Fadikar P, Barman PD, Paira R. Application of recyclable base-washed graphene oxide for one-pot conversion of 2-aminopyridines into 5-iodo-imidazo[1,2-a]pyridines at room temperature in water. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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21
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Zhou Z, Luo D, Li G, Yang Z, Cui L, Yang W. Copper-catalyzed three-component reaction to synthesize polysubstituted imidazo[1,2- a]pyridines. RSC Adv 2022; 12:20199-20205. [PMID: 35919587 PMCID: PMC9280286 DOI: 10.1039/d2ra02722d] [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: 04/29/2022] [Accepted: 07/07/2022] [Indexed: 12/02/2022] Open
Abstract
An efficient three-component one-pot and operationally simple cascade of 2-aminopyridines with sulfonyl azides and terminal ynones is reported, providing a variety of polysubstituted imidazo[1,2-a]pyridine derivatives in moderate to excellent yields. In particular, the reaction goes a through CuAAC/ring-cleavage process and forms a highly active intermediate α-acyl-N-sulfonyl ketenimine with base free. Three-component one-pot synthesis of polysubstituted imidazo[1,2-a]pyridine derivatives through a base free CuAAC/ring-cleavage process.![]()
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Affiliation(s)
- Zitong Zhou
- Public Service Platform of South China Sea for R&D Marine Biomedicine Resources, The Marine Biomedical Research Institute, Guangdong Medical University, Zhanjiang, 524023, China
| | - Danyang Luo
- Public Service Platform of South China Sea for R&D Marine Biomedicine Resources, The Marine Biomedical Research Institute, Guangdong Medical University, Zhanjiang, 524023, China
| | - Guanrong Li
- Public Service Platform of South China Sea for R&D Marine Biomedicine Resources, The Marine Biomedical Research Institute, Guangdong Medical University, Zhanjiang, 524023, China
| | - Zhongtao Yang
- Public Service Platform of South China Sea for R&D Marine Biomedicine Resources, The Marine Biomedical Research Institute, Guangdong Medical University, Zhanjiang, 524023, China
| | - Liao Cui
- Public Service Platform of South China Sea for R&D Marine Biomedicine Resources, The Marine Biomedical Research Institute, Guangdong Medical University, Zhanjiang, 524023, China
| | - Weiguang Yang
- Public Service Platform of South China Sea for R&D Marine Biomedicine Resources, The Marine Biomedical Research Institute, Guangdong Medical University, Zhanjiang, 524023, China
- The Marine Biomedical Research Institute of Guangdong Zhanjiang, Zhanjiang, Guangdong, 524023, China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang), Zhanjiang, Guangdong, 524023, China
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22
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Yu D, Ji R, Sun Z, Li W, Liu ZQ. Electrochemical chlorination and bromination of electron-deficient C H bonds in quinones, coumarins, quinoxalines and 1,3-diketones. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153514] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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23
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Wu Y, Xu S, Wang H, Shao D, Qi Q, Lu Y, Ma L, Zhou J, Hu W, Gao W, Chen J. Directing Group Enables Electrochemical Selectively Meta-Bromination of Pyridines under Mild Conditions. J Org Chem 2021; 86:16144-16150. [PMID: 34128672 DOI: 10.1021/acs.joc.1c00923] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Without the use of catalysts and oxidants, a facile and sustainable electrochemical bromination protocol was developed. By introducing the directing groups, the regioselectivity of pyridine derivatives could be controlled at the meta-position utilizing the inexpensive and safe bromine salts at room temperature. A variety of brominated pyridine derivatives were obtained in 28-95% yields, and the reaction could be readily performed at a gram scale. By combining the installation and removing the directing group, the concept of meta-bromination of pyridines could be verified.
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Affiliation(s)
- Yanwei Wu
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, People's Republic of China
| | - Shanghui Xu
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, People's Republic of China
| | - Hong Wang
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, People's Republic of China
| | - Dongxu Shao
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, People's Republic of China
| | - Qiqi Qi
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, People's Republic of China
| | - Yi Lu
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, People's Republic of China
| | - Li Ma
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, People's Republic of China
| | - Jianhua Zhou
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, People's Republic of China
| | - Wei Hu
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, People's Republic of China
| | - Wei Gao
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, People's Republic of China.,Archives of Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, People's Republic of China
| | - Jianbin Chen
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, People's Republic of China.,State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, People's Republic of China
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24
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Tali JA, Kumar G, Singh D, Shankar R. Palladium(II) catalyzed site-selective C-H olefination of imidazo[1,2- a]pyridines. Org Biomol Chem 2021; 19:9401-9406. [PMID: 34705920 DOI: 10.1039/d1ob01683k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Herein, we disclose an efficient Pd(II)-catalyzed site selective C8 alkenylation of imidazo[1,2-a]pyridines with electronically biased olefinic substrates. Notably, besides the presence of four C-H sites available, selective mono-alkenylation was achieved by N-chelation overriding O-chelation. The versatility and scalability of the catalysis enabled the selective late-stage functionalization of a marketed drug, zolimidine. Various substituted heteroaryl alkenes can be afforded with moderate to good yields with high C8 regioselectivity.
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Affiliation(s)
- Javeed Ahmad Tali
- Natural Product and Medicinal Chemistry (NPMC), CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Gulshan Kumar
- Natural Product and Medicinal Chemistry (NPMC), CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Davinder Singh
- Natural Product and Medicinal Chemistry (NPMC), CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Ravi Shankar
- Natural Product and Medicinal Chemistry (NPMC), CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
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25
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Mal S, Jana M, Sarkar S. Recent Update on Transition Metal‐Free C(sp
2
)−H Bond Halogenation in (Hetero) Arenes. ChemistrySelect 2021. [DOI: 10.1002/slct.202102956] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Sourav Mal
- Department of Chemistry University of Kalyani Kalyani 741235 West Bengal India
| | - Manoranjan Jana
- Department of Chemistry University of Kalyani Kalyani 741235 West Bengal India
| | - Satinath Sarkar
- Department of Chemistry University of Kalyani Kalyani 741235 West Bengal India
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26
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Yang H, Huang N, Wang N, Shen H, Teng F, Liu X, Jiang H, Tan MC, Gui QW. Ultrasound-Assisted Iodination of Imidazo[1,2-α]pyridines Via C-H Functionalization Mediated by tert-Butyl Hydroperoxide. ACS OMEGA 2021; 6:25940-25949. [PMID: 34660956 PMCID: PMC8515396 DOI: 10.1021/acsomega.1c02645] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 08/05/2021] [Indexed: 05/15/2023]
Abstract
A novel metal catalyst-free and environmentally friendly method for the regioselective iodination of imidazo[1,2-α]pyridines at their C3 position is disclosed, which has a wide substrate scope and could be sustainable. This reaction proceeds through ultrasound acceleration in the presence of a green alcohol solvent. Compared with a conventional heating system, the reaction efficiency and the rate are significantly improved and the iodine atom economy is maximized using ultrasound techniques.
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Affiliation(s)
- Hua Yang
- College
of Bioscience and Biotechnology, Hunan Agricultural
University, Changsha 410128, People’s Republic
of China
| | - Ning Huang
- School
of Chemistry and Materials Science, Hunan
Agricultural University, Changsha 410128, People’s Republic
of China
| | - Nengqing Wang
- School
of Chemistry and Materials Science, Hunan
Agricultural University, Changsha 410128, People’s Republic
of China
| | - Haicheng Shen
- School
of Chemistry and Materials Science, Hunan
Agricultural University, Changsha 410128, People’s Republic
of China
| | - Fan Teng
- School
of Chemistry and Materials Science, Hunan
Agricultural University, Changsha 410128, People’s Republic
of China
| | - Xiaoying Liu
- School
of Chemistry and Materials Science, Hunan
Agricultural University, Changsha 410128, People’s Republic
of China
| | - Hongmei Jiang
- School
of Chemistry and Materials Science, Hunan
Agricultural University, Changsha 410128, People’s Republic
of China
| | - Mei-Chen Tan
- School
of Chemistry and Materials Science, Hunan
Agricultural University, Changsha 410128, People’s Republic
of China
| | - Qing-Wen Gui
- School
of Chemistry and Materials Science, Hunan
Agricultural University, Changsha 410128, People’s Republic
of China
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27
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Krake EF, Baumann W. Selective Oxidation of Clopidogrel by Peroxymonosulfate (PMS) and Sodium Halide (NaX) System: An NMR Study. Molecules 2021; 26:5921. [PMID: 34641465 PMCID: PMC8512727 DOI: 10.3390/molecules26195921] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 09/23/2021] [Accepted: 09/25/2021] [Indexed: 11/17/2022] Open
Abstract
A selective transformation of clopidogrel hydrogen sulfate (CLP) by reactive halogen species (HOX) generated from peroxymonosulfate (PMS) and sodium halide (NaX) is described. Other sustainable oxidants as well as different solvents have also been investigated. As result of this study, for each sodium salt the reaction conditions were optimized, and four different degradation products were formed. Three products were halogenated at C-2 on the thiophene ring and have concomitant functional transformation, such as N-oxide in the piperidine group. A halogenated endo-iminium product was also observed. With this condition, a fast preparation of known endo-iminium clopidogrel impurity (new counterion) was reported as well. The progress of the reaction was monitored using nuclear magnetic resonance spectroscopy as an analytical tool and all the products were characterized by 1D-, 2D-NMR and HRMS.
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Affiliation(s)
| | - Wolfgang Baumann
- Leibniz-Institut für Katalyse e.V., Albert-Einstein-Straße 29a, 18059 Rostock, Germany;
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28
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Wu Y, Li L, Wen K, Deng J, Chen J, Shi J, Wu T, Pang J, Tang X. Copper-Catalyzed C-3 Functionalization of Imidazo[1,2- a]pyridines with 3-Indoleacetic Acids. J Org Chem 2021; 86:12394-12402. [PMID: 34387491 DOI: 10.1021/acs.joc.1c01371] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A copper-catalyzed C-3 functionalization of imidazo[1,2-a]pyridines with 3-indoleacetic acids through an aerobic oxidative decarboxylative process has been developed. The protocol provided a series of 3-(1H-indol-3-ylmethyl)-imidazo[1,2-a]pyridines in moderate to good yields under simple reaction conditions. Importantly, some products exhibited potent antiproliferative activity in cancer cell lines.
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Affiliation(s)
- Yinrong Wu
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, 1023 South Shatai Road, Baiyun District, Guangzhou 510515, People's Republic of China
| | - Lu Li
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, 1023 South Shatai Road, Baiyun District, Guangzhou 510515, People's Republic of China
| | - Kangmei Wen
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, 1023 South Shatai Road, Baiyun District, Guangzhou 510515, People's Republic of China
| | - Jie Deng
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, 1023 South Shatai Road, Baiyun District, Guangzhou 510515, People's Republic of China
| | - Jiewen Chen
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, 1023 South Shatai Road, Baiyun District, Guangzhou 510515, People's Republic of China
| | - Jie Shi
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, 1023 South Shatai Road, Baiyun District, Guangzhou 510515, People's Republic of China
| | - Ting Wu
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, 1023 South Shatai Road, Baiyun District, Guangzhou 510515, People's Republic of China
| | - Jianxin Pang
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, 1023 South Shatai Road, Baiyun District, Guangzhou 510515, People's Republic of China
| | - Xiaodong Tang
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, 1023 South Shatai Road, Baiyun District, Guangzhou 510515, People's Republic of China
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29
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Yadav RK, Sharma R, Gautam D, Joshi J, Chaudhary S. Lewis Acid/Oxidant as Rapid Regioselective Halogenating Reagent System for Direct Halogenation of Fused Bi‐/Tri‐cyclic Hetero‐Aromatic Congeners
via
−H bond Functionalization. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100156] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Ravi Kant Yadav
- Laboratory of Organic and Medicinal Chemistry (OMC lab) Department of Chemistry Malaviya National Institute of Technology Jaipur Jawaharlal Nehru Marg Jaipur 302017 India
- Department of Chemistry Malaviya National Institute of Technology Jaipur Jawaharlal Nehru Marg Jaipur 302017 India
| | - Richa Sharma
- Laboratory of Organic and Medicinal Chemistry (OMC lab) Department of Chemistry Malaviya National Institute of Technology Jaipur Jawaharlal Nehru Marg Jaipur 302017 India
| | - Deepak Gautam
- Laboratory of Organic and Medicinal Chemistry (OMC lab) Department of Chemistry Malaviya National Institute of Technology Jaipur Jawaharlal Nehru Marg Jaipur 302017 India
| | - Jyoti Joshi
- Department of Chemistry Malaviya National Institute of Technology Jaipur Jawaharlal Nehru Marg Jaipur 302017 India
| | - Sandeep Chaudhary
- Laboratory of Organic and Medicinal Chemistry (OMC lab) Department of Chemistry Malaviya National Institute of Technology Jaipur Jawaharlal Nehru Marg Jaipur 302017 India
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30
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Lafzi F, Kilic H. Metal‐ and Additive‐Free C3‐Functionalization of Imidazo[1,2‐
a
]pyridines with
para
‐Quinone Methides. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100313] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ferruh Lafzi
- Department of Chemistry Faculty of Sciences Atatürk University 25240 Erzurum Turkey
| | - Haydar Kilic
- Department of Chemistry Faculty of Sciences Atatürk University 25240 Erzurum Turkey
- Oltu Vocational Training School Atatürk University 25400 Erzurum Turkey
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31
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Demina MA, Egorova EM, Garkushin IK, Burchakov AV, Ignat’eva EO. Phase Equilibria in the NaCl–NaBr–Na2CrO4 Ternary System. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2021. [DOI: 10.1134/s003602442106008x] [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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32
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Singh B, Ahmed J, Biswas A, Paira R, Mandal SK. Reduced Phenalenyl in Catalytic Dehalogenative Deuteration and Hydrodehalogenation of Aryl Halides. J Org Chem 2021; 86:7242-7255. [PMID: 33949861 DOI: 10.1021/acs.joc.1c00573] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Dehalogenative deuteration reactions are generally performed through metal-mediated processes. This report demonstrates a mild protocol for hydrodehalogenation and dehalogenative deuteration of aryl/heteroaryl halides (39 examples) using a reduced odd alternant hydrocarbon phenalenyl under transition metal-free conditions and has been employed successfully for the incorporation of deuterium in various biologically active compounds. The combined approach of experimental and theoretical studies revealed a single electron transfer-based mechanism.
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Affiliation(s)
- Bhagat Singh
- Department of Chemical Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur 741246, India
| | - Jasimuddin Ahmed
- Department of Chemical Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur 741246, India
| | - Amit Biswas
- Department of Chemical Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur 741246, India
| | - Rupankar Paira
- Department of Chemistry, Maharaja Manindra Chandra College, 20 Ramkanto Bose Street, Kolkata 700003, India
| | - Swadhin K Mandal
- Department of Chemical Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur 741246, India
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33
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Kalari S, Balasubramanian S, Rode HB. Difluorinative-hydroxylation and C-3 functionalization (halogenation/SCN/NO) of imidazopyridine using Selectfluor as fluorine source or oxidant respectively. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153028] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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34
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Hellwig PS, Guedes JS, Barcellos AM, Jacob RG, Silveira CC, Lenardão EJ, Perin G. Synthesis of benzo[ b]chalcogenophenes fused to selenophenes via intramolecular electrophilic cyclization of 1,3-diynes. Org Biomol Chem 2021; 19:596-604. [PMID: 33355583 DOI: 10.1039/d0ob02362k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
We describe herein an alternative and transition-metal-free procedure for the access of benzo[b]chalcogenophenes fused to selenophenes via intramolecular cyclization of 1,3-diynes. This efficient protocol involves a double cyclization of 1,3-diynyl chalcogen derivatives promoted by the electrophilic species of organoselenium generated in situ by the oxidative cleavage of the Se-Se bond of dibutyl diselenide using Oxone® in acetonitrile as solvent in an open-flask at 80 °C. In this study, 15 selenophenes with broad substrate scope were prepared in moderate to excellent yields (55-98%) with short reaction times (0.5-3.0 h).
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Affiliation(s)
- Paola S Hellwig
- LASOL-CCQFA, Universidade Federal de Pelotas - UFPel, P.O. Box 354, 96010-900, Pelotas, RS, Brazil.
| | - Jonatan S Guedes
- LASOL-CCQFA, Universidade Federal de Pelotas - UFPel, P.O. Box 354, 96010-900, Pelotas, RS, Brazil.
| | - Angelita M Barcellos
- LASOL-CCQFA, Universidade Federal de Pelotas - UFPel, P.O. Box 354, 96010-900, Pelotas, RS, Brazil.
| | - Raquel G Jacob
- LASOL-CCQFA, Universidade Federal de Pelotas - UFPel, P.O. Box 354, 96010-900, Pelotas, RS, Brazil.
| | - Claudio C Silveira
- Departamento de Química, Universidade Federal de Santa Maria - UFSM, CEP: 97105-900, Santa Maria - RS, Brazil
| | - Eder J Lenardão
- LASOL-CCQFA, Universidade Federal de Pelotas - UFPel, P.O. Box 354, 96010-900, Pelotas, RS, Brazil.
| | - Gelson Perin
- LASOL-CCQFA, Universidade Federal de Pelotas - UFPel, P.O. Box 354, 96010-900, Pelotas, RS, Brazil.
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35
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Ghosh P, Chhetri G, Das S. Metal free C-3 chalcogenation (sulfenylation and selenylation) of 4 H-pyrido[1,2- a]pyrimidin-4-ones. RSC Adv 2021; 11:10258-10263. [PMID: 35423521 PMCID: PMC8695620 DOI: 10.1039/d1ra00834j] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Accepted: 03/03/2021] [Indexed: 11/21/2022] Open
Abstract
An expeditious metal free C-3 chalcogenation of 4H-pyrido[1,2-a]pyrimidin-4-one has been devised to synthesize diversely orchestrated 3-ArS/ArSe derivatives in high yields (up to 95%). This operationally simple reaction proceeds under mild reaction conditions, can be executed in gram scale, and also highlights broad functional group tolerance. Preliminary experimental investigation suggests a radical mechanistic pathway for these transformations.
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Affiliation(s)
- Prasanjit Ghosh
- Department of Chemistry, University of North Bengal Darjeeling-734013 India +91-0353-2699-001 +91-0353-2776-381
| | - Gautam Chhetri
- Department of Chemistry, University of North Bengal Darjeeling-734013 India +91-0353-2699-001 +91-0353-2776-381
| | - Sajal Das
- Department of Chemistry, University of North Bengal Darjeeling-734013 India +91-0353-2699-001 +91-0353-2776-381
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36
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Fan J, Wei Q, Zhu E, Gao J, Cheng X, Lu Y, Loh TP. Visible light-induced mono-bromination of arenes with BrCCl 3. Chem Commun (Camb) 2021; 57:5977-5980. [PMID: 34027541 DOI: 10.1039/d1cc01721g] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly efficient and regioselective bromination of electron-rich arenes and heteroarenes using commercially available BrCCl3 as a "Br" source has been developed. The reaction was performed in air under mild conditions with photocatalyst Ru(bpy)3Cl2·6H2O, avoiding the usage of strong acids and strong oxidants. Mono-brominated products were obtained with medium to excellent yields (up to 94%). This strategy has shown good compatibility and high para-selectivity, which will facilitate the complicated synthesis.
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Affiliation(s)
- Jiali Fan
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University (Nanjing Tech), Nanjing 211816, P. R. China.
| | - Qiancheng Wei
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University (Nanjing Tech), Nanjing 211816, P. R. China.
| | - Ershu Zhu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University (Nanjing Tech), Nanjing 211816, P. R. China.
| | - Jing Gao
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University (Nanjing Tech), Nanjing 211816, P. R. China.
| | - Xiamin Cheng
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University (Nanjing Tech), Nanjing 211816, P. R. China.
| | - Yongna Lu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University (Nanjing Tech), Nanjing 211816, P. R. China.
| | - Teck-Peng Loh
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University (Nanjing Tech), Nanjing 211816, P. R. China. and Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
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37
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Singh D, Tali JA, Kumar G, Shankar R. Metal-free oxidative decarbonylative halogenation of fused imidazoles. NEW J CHEM 2021. [DOI: 10.1039/d1nj04440k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An efficient strategy has been developed for the deformylative halogenation of carbaldehyde imidazo-fused heterocycles in the presence of TBHP controlled by temperature.
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Affiliation(s)
- Davinder Singh
- Natural Products and Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Jammu, 180001, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Javeed Ahmad Tali
- Natural Products and Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Jammu, 180001, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Gulshan Kumar
- Natural Products and Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Jammu, 180001, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Ravi Shankar
- Natural Products and Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Jammu, 180001, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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38
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Cárcamo-Martínez Á, Mallon B, Anjani QK, Domínguez-Robles J, Utomo E, Vora LK, Tekko IA, Larrañeta E, Donnelly RF. Enhancing intradermal delivery of tofacitinib citrate: Comparison between powder-loaded hollow microneedle arrays and dissolving microneedle arrays. Int J Pharm 2020; 593:120152. [PMID: 33301867 DOI: 10.1016/j.ijpharm.2020.120152] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 11/28/2020] [Accepted: 12/02/2020] [Indexed: 02/06/2023]
Abstract
Autoimmune-mediated inflammatory skin diseases, such as psoriasis, alopecia areata, and vitiligo, have been reported as the 4th leading cause of nonfatal disease burden worldwide. This is mainly related to the poor quality of life experienced by these patients. Although topical and systemic steroids represent the most common treatment, the variability in success rates and side effects often lead to treatment discontinuation. Recent off-label clinical studies using oral Janus Kinase (JAK) inhibitors (e.g., ruxolitinib, tofacitinib, baraticinib) have shown promising results. However, frequent side effects, such as infections and blood clots have been reported. Therefore, the aim of this research was to enhance the intradermal delivery of tofacitinib citrate with MN arrays. Using crosslinked hydrogels containing modifying agents (urea, sorbitol and sodium chloride), hollow MN arrays were fabricated and then loaded with tofacitinib citrate. Their efficiency in intradermal delivery of tofacitinib was compared with dissolving MN arrays and a control (Aqueous cream BP), using neonatal porcine skin. Despite the fact that the hydrogel was only present on the outer surface, hollow MN arrays showed comparable resistance to compression values and insertion capabilities to dissolving MN arrays. Although hollow MN arrays containing NaCl in the formulation led to slightly higher depositions of tofacitinib in epidermis and dermis of neonatal porcine skin when compared to a control cream, dissolving MN arrays showed superiority in terms of tofacitinib deposition in the dermis. Indeed, at 24 h of the study, control cream and dissolving MN arrays delivered 143.98 ug/cm2 and 835 ug/cm2 of drug in the dermis, respectively, confirming the enhanced intradermal drug delivery capacity of MN arrays and their potential for treatment of autoimmune skin diseases.
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Affiliation(s)
- Álvaro Cárcamo-Martínez
- School of Pharmacy, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Brónach Mallon
- School of Pharmacy, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Qonita Kurnia Anjani
- School of Pharmacy, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Juan Domínguez-Robles
- School of Pharmacy, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Emilia Utomo
- School of Pharmacy, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Lalit K Vora
- School of Pharmacy, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Ismael A Tekko
- School of Pharmacy, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Eneko Larrañeta
- School of Pharmacy, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Ryan F Donnelly
- School of Pharmacy, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, UK.
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39
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Gao F, Sun K, Chen XL, Shi T, Li XY, Qu LB, Zhao YF, Yu B. Visible-Light-Induced Phosphorylation of Imidazo-Fused Heterocycles under Metal-Free Conditions. J Org Chem 2020; 85:14744-14752. [PMID: 33136392 DOI: 10.1021/acs.joc.0c02107] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A metal-free and base-free procedure for the phosphorylation of imidazo[1,2-a]pyridines with phosphine oxides under the irradiation of visible light at room temperature in green solvent was reported, featuring mild and sustainable conditions, convenient operation, as well as good functional group compatibility.
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Affiliation(s)
- Fan Gao
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Kexue Road No. 100, Zhengzhou 450001, China
| | - Kai Sun
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Kexue Road No. 100, Zhengzhou 450001, China
| | - Xiao-Lan Chen
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Kexue Road No. 100, Zhengzhou 450001, China
| | - Tao Shi
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Kexue Road No. 100, Zhengzhou 450001, China
| | - Xiao-Yun Li
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Kexue Road No. 100, Zhengzhou 450001, China
| | - Ling-Bo Qu
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Kexue Road No. 100, Zhengzhou 450001, China
| | - Yu-Fen Zhao
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Kexue Road No. 100, Zhengzhou 450001, China.,Institute Drug Discovery Technology, Ningbo University, Ningbo 315211, Zhejiang, China
| | - Bing Yu
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Kexue Road No. 100, Zhengzhou 450001, China
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40
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Zhu S, Wang B, Li H, Xiao W, Teng F, Shen H, Gui Q, Li Z, Jiang H. Halogenation of Imidazo[1,2‐
α
]pyridines with DXDMH (X=Cl, Br and I) Using DMSO as a Solvent and an Oxidant. ChemistrySelect 2020. [DOI: 10.1002/slct.202003161] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Sha Zhu
- School of Chemistry and Materials Science Hunan Agricultural University Changsha 410128 People's Republic of China
| | - Binbin Wang
- School of Chemistry and Materials Science Hunan Agricultural University Changsha 410128 People's Republic of China
| | - Huiqin Li
- School of Chemistry and Materials Science Hunan Agricultural University Changsha 410128 People's Republic of China
| | - Wending Xiao
- Hunan Jiudian Pharmaceutical Co. Changsha 410009 People's Republic of China
| | - Fan Teng
- School of Chemistry and Materials Science Hunan Agricultural University Changsha 410128 People's Republic of China
| | - Haicheng Shen
- School of Chemistry and Materials Science Hunan Agricultural University Changsha 410128 People's Republic of China
| | - Qing‐Wen Gui
- School of Chemistry and Materials Science Hunan Agricultural University Changsha 410128 People's Republic of China
| | - Zhouchao Li
- School of Chemistry and Materials Science Hunan Agricultural University Changsha 410128 People's Republic of China
| | - Hongmei Jiang
- School of Chemistry and Materials Science Hunan Agricultural University Changsha 410128 People's Republic of China
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41
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Patel OPS, Nandwana NK, Legoabe LJ, Das BC, Kumar A. Recent Advances in Radical C−H Bond Functionalization of Imidazoheterocycles. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000633] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Om P. S. Patel
- Department of Chemistry Birla Institute of Technology and Science Pilani Pilani Campus 333031 Rajasthan India
- Centre of Excellence for Pharmaceutical Sciences North-West University Private Bag X6001 Potchefstroom 2520 South Africa
| | - Nitesh K. Nandwana
- Department of Chemistry Birla Institute of Technology and Science Pilani Pilani Campus 333031 Rajasthan India
- Departments of Medicine and Pharmacological Sciences Icahn School of Medicine at Mount Sinai New York, NY 10029 USA
| | - Lesetja J. Legoabe
- Centre of Excellence for Pharmaceutical Sciences North-West University Private Bag X6001 Potchefstroom 2520 South Africa
| | - Bhaskar C. Das
- Departments of Medicine and Pharmacological Sciences Icahn School of Medicine at Mount Sinai New York, NY 10029 USA
| | - Anil Kumar
- Department of Chemistry Birla Institute of Technology and Science Pilani Pilani Campus 333031 Rajasthan India
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42
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Kumar R, Rawat D, Adimurthy S. Polyethylene Glycol (PEG-400) as Methylene Spacer and Green Solvent for the Synthesis of Heterodiarylmethanes under Metal-Free Conditions. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000467] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Rahul Kumar
- Academy of Scientific & Innovative Research; CSIR-Central Salt & Marine Chemicals Research Institute; G.B. Marg; 364 002 Bhavnagar Gujarat India
| | - Deepa Rawat
- Academy of Scientific & Innovative Research; CSIR-Central Salt & Marine Chemicals Research Institute; G.B. Marg; 364 002 Bhavnagar Gujarat India
| | - Subbarayappa Adimurthy
- Academy of Scientific & Innovative Research; CSIR-Central Salt & Marine Chemicals Research Institute; G.B. Marg; 364 002 Bhavnagar Gujarat India
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43
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Egorova EM, Garkushin IK, Kondratyuk IM, Tarasova OA. Investigation of Phase Equilibria in the Ternary Systems RbCl–RbI–Rb2CrO4 and CsCl–CsI–Cs2CrO4. RUSS J INORG CHEM+ 2020. [DOI: 10.1134/s003602362004004x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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44
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Chen G, Li B, Hu B, Zhang X, Fan X. FeCl3-catalyzed C-3 functionalization of imidazo[1,2-a]pyridines with diazoacetonitrile under oxidant- and ligand-free conditions. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151774] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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45
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46
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Wang L, Feng C, Zhang Y, Hu J. Regioselective Monobromination of Phenols with KBr and ZnAl-BrO 3--Layered Double Hydroxides. Molecules 2020; 25:E914. [PMID: 32085603 PMCID: PMC7070364 DOI: 10.3390/molecules25040914] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Revised: 02/15/2020] [Accepted: 02/16/2020] [Indexed: 11/19/2022] Open
Abstract
The regioselective mono-bromination of phenols has been successfully developed with KBr and ZnAl-BrO3--layered double hydroxides (abbreviated as ZnAl-BrO3--LDHs) as brominating reagents. The para site is much favorable and the ortho site takes the priority if para site is occupied. This reaction featured with excellent regioselectivity, cheap brominating reagents, mild reaction condition, high atom economy, broad substrate scope, and provided an efficient method to synthesize bromophenols.
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Affiliation(s)
- Ligeng Wang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310004, China; (C.F.); (Y.Z.)
| | | | | | - Jun Hu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310004, China; (C.F.); (Y.Z.)
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47
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Kittikool T, Yotphan S. Metal-Free Direct C-H Thiolation and Thiocyanation of Pyrazolones. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901770] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Tanakorn Kittikool
- Department of Chemistry and Center of Excellence for Innovation in Chemistry; Faculty of Science; Mahidol University; Rama VI Road 10400 Bangkok Thailand
| | - Sirilata Yotphan
- Department of Chemistry and Center of Excellence for Innovation in Chemistry; Faculty of Science; Mahidol University; Rama VI Road 10400 Bangkok Thailand
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48
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One-pot synthesis of 3-haloflavones from flavones using Oxone® and potassium halide as a halogenation reagent. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2019.151511] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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49
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Park JW, Kim YH, Kim DY. Electrochemical oxidative iodination of imidazo[1,2-a]pyridines using NaI as iodine source. SYNTHETIC COMMUN 2020. [DOI: 10.1080/00397911.2020.1717539] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Jin Wha Park
- Department of Chemistry, Soonchunhyang University, Asan, Republic of Korea
| | - Yong Hwan Kim
- Department of Chemistry, Soonchunhyang University, Asan, Republic of Korea
| | - Dae Young Kim
- Department of Chemistry, Soonchunhyang University, Asan, Republic of Korea
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50
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Tashrifi Z, Mohammadi-Khanaposhtani M, Larijani B, Mahdavi M. C3-Functionalization of Imidazo[1,2-a
]pyridines. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901491] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Zahra Tashrifi
- Endocrinology and Metabolism Research Center; Endocrinology and Metabolism Clinical Sciences Institute; Tehran University of Medical Sciences; Tehran I.R. Iran
| | | | - Bagher Larijani
- Endocrinology and Metabolism Research Center; Endocrinology and Metabolism Clinical Sciences Institute; Tehran University of Medical Sciences; Tehran I.R. Iran
| | - Mohammad Mahdavi
- Endocrinology and Metabolism Research Center; Endocrinology and Metabolism Clinical Sciences Institute; Tehran University of Medical Sciences; Tehran I.R. Iran
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