1
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Gao J, Fu X, Yang K, Liu Z. Recent Advances in Visible Light-Induced C-H Functionalization of Imidazo[1,2-a]pyridines. Molecules 2025; 30:607. [PMID: 39942710 PMCID: PMC11820825 DOI: 10.3390/molecules30030607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2025] [Revised: 01/27/2025] [Accepted: 01/27/2025] [Indexed: 02/16/2025] Open
Abstract
The imidazo[1,2-a]pyridine skeleton is widely present in many natural products and pharmaceutical agents. Due to its impressive and significant biological activities, such as analgesic, anti-tumor, antiosteoporosis, and anxiolytic properties, the derivatization of imidazo[1,2-a]pyridine skeleton has attracted widespread attention from chemists. In recent years, significant progress has been made in the derivatization of imidazo[1,2-a]pyridines through direct C-H functionalization, especially through visible light induction. This review highlights recent advances in visible light-induced C-H functionalization of imidazo[1,2-a]pyridines during the past ten years, and some reaction mechanisms are also discussed.
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Affiliation(s)
| | | | | | - Zhaowen Liu
- Jiangxi Province Key Laboratory of Pharmacology of Traditional Chinese Medicine, College of Pharmacy, Gannan Medical University, Ganzhou 341000, China; (J.G.); (X.F.); (K.Y.)
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2
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Huang M, Deng L, Lao T, Zhang Z, Su Z, Yu Y, Cao H. Dehydrogenation Coupling and [3 + 2] Cycloaddition of Indolizines with Allenes in the Presence of Piezoelectric Materials under Ball Milling Conditions. J Org Chem 2024; 89:9733-9743. [PMID: 38959385 DOI: 10.1021/acs.joc.3c02404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/05/2024]
Abstract
A wide range of indolizines with allenes proceeded smoothly under mechanochemical-induced conditions via [3 + 2] annulation process, affording various substituted pyrrolo[2,1,5-cd]indolizines with good yield. The reaction efficiency was greatly improved by using a piezoelectric material as the charge transfer catalyst. The photophysical properties of the resulting pyrrolo[2,1,5-cd]indolizine was characterized.
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Affiliation(s)
- Mingzhou Huang
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering and Technology Research Centre, Guangdong Pharmaceutical University, Zhongshan 528458, China
| | - Lichan Deng
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering and Technology Research Centre, Guangdong Pharmaceutical University, Zhongshan 528458, China
| | - Tianfeng Lao
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering and Technology Research Centre, Guangdong Pharmaceutical University, Zhongshan 528458, China
| | - Ziwu Zhang
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering and Technology Research Centre, Guangdong Pharmaceutical University, Zhongshan 528458, China
| | - Zhengquan Su
- Guangdong Engineering Research Centre of Natural Products and New Drugs, Guangdong Provincial University Engineering Technology Research Centre of Natural Products and Drugs, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Yue Yu
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering and Technology Research Centre, Guangdong Pharmaceutical University, Zhongshan 528458, China
- Guangdong Pharmaceutical University-University of Hong Kong Joint Biomedical Innovation Platform, Zhongshan 528437, China
| | - Hua Cao
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering and Technology Research Centre, Guangdong Pharmaceutical University, Zhongshan 528458, China
- Guangdong Pharmaceutical University-University of Hong Kong Joint Biomedical Innovation Platform, Zhongshan 528437, China
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3
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Kumar Jha R, Rohilla K, Jain S, Parganiha D, Kumar S. Blue-Light Irradiated Mn(0)-Catalyzed Hydroxylation and C(sp 3 )-H Functionalization of Unactivated Alkanes with C(sp 2 )-H Bonds of Quinones for Alkylated Hydroxy Quinones and Parvaquone. Chemistry 2024; 30:e202303537. [PMID: 37991931 DOI: 10.1002/chem.202303537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 11/20/2023] [Accepted: 11/22/2023] [Indexed: 11/24/2023]
Abstract
Site-selective C(sp3 )-H functionalization of unreactive hydrocarbons is always challenging due to its inherited chemical inertness, slightly different reactivity of various C-H bonds, and intrinsically high bond dissociation energies. Here, a site-selective C-H alkylation of naphthoquinone with unactivated hydrocarbons using Mn2 (CO)10 as a catalyst under blue-light (457 nm) irradiation without any external acid or base and pre-functionalization is presented. The selective C-H functionalization of tertiary over secondary and secondary over primary C(sp3 )-H bonds in abundant chemical feedstocks was achieved, and hydroxylation of quinones was realized in situ by employing the developed methodology. This protocol provides a new catalytic system for the direct construction of high-value-added compounds, namely, parvaquone (a commercially available drug used to treat theileriosis) and its derivatives under ambient reaction conditions. Moreover, this operationally simple protocol applies to various linear-, branched-, and cyclo-alkanes with high degrees of site selectivity under blue-light irradiated conditions and could provide rapid and straightforward access to versatile methodologies for upgrading feedstock chemicals. Mechanistic insight by radical trapping, radical scavenging, EPR, and other controlled experiments well corroborated with DFT studies suggest that the reaction proceeds by a radical pathway.
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Affiliation(s)
- Raushan Kumar Jha
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-pass Road, Bhauri, Bhopal, Madhya Pradesh, 462066, India
| | - Komal Rohilla
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-pass Road, Bhauri, Bhopal, Madhya Pradesh, 462066, India
| | - Saket Jain
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-pass Road, Bhauri, Bhopal, Madhya Pradesh, 462066, India
| | - Devendra Parganiha
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-pass Road, Bhauri, Bhopal, Madhya Pradesh, 462066, India
| | - Sangit Kumar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-pass Road, Bhauri, Bhopal, Madhya Pradesh, 462066, India
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4
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Mohar M, Ghosh S, Hajra A. Visible Light Induced Three-Component 1,2-Dicarbofunctionalization of Alkenes and Alkynes. CHEM REC 2023; 23:e202300121. [PMID: 37309268 DOI: 10.1002/tcr.202300121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 05/31/2023] [Indexed: 06/14/2023]
Abstract
Harnessing visible-light in organic synthesis is one of the most effective methods that aligns with green and sustainable chemistry principles and hence skyrocketed in the last two decades. Similarly, three-component 1,2-dicarbofunctionalization of alkenes and alkynes has recently been a great choice to construct complex molecular systems in an easy and rapid manner. Therefore, light-induced reactions can be an excellent alternative to carry out 1,2-dicarbofunctionalization reactions, and very recently, organic chemists across the globe have fascinated us with their interesting articles. In this present review, we have summarized the recent advancements in the area of visible light induced three-component 1,2-dicarbofunctionalization of alkenes and alkynes till March 2023. We have categorized the discussion based on the catalysts used to carry out the transformations for better understanding and different important aspects of these transformations have also been covered.
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Affiliation(s)
- Mrittika Mohar
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan, 731235, India
| | - Sumit Ghosh
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan, 731235, India
| | - Alakananda Hajra
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan, 731235, India
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5
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Liao W, Hou J, Tang H, Guo X, Sheng G, Jin M. Photoredox Catalysis with Visible Light for Synthesis of Thioxanthones Derivatives. Org Lett 2023; 25:6352-6356. [PMID: 37584450 DOI: 10.1021/acs.orglett.3c02253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/17/2023]
Abstract
A visible-light-promoted and transition-metal-free photoredox-catalysis strategy is developed for the synthesis of thioxanthone derivatives (TXs). The mechanistic study and density functional theory calculations suggest that visible-light-promoted intramolecular cyclization can be divided into hydrogen atom transfer, C-C formation, and oxidative dehydrogenation with high regioselectivity and reactivity. Significantly, this C-C formation strategy can be used in TXs-based commercial photoinitiators and drugs at the gram level.
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Affiliation(s)
- Wen Liao
- Department of Polymer Materials, School of Materials Science and Engineering, Tongji University, Shanghai 201804, P. R. China
| | - Jing Hou
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Sauvage Center for Molecular Sciences, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P. R. China
| | - Hongding Tang
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Sauvage Center for Molecular Sciences, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P. R. China
| | - Xinyue Guo
- Department of Polymer Materials, School of Materials Science and Engineering, Tongji University, Shanghai 201804, P. R. China
| | - Guanyu Sheng
- Department of Polymer Materials, School of Materials Science and Engineering, Tongji University, Shanghai 201804, P. R. China
| | - Ming Jin
- Department of Polymer Materials, School of Materials Science and Engineering, Tongji University, Shanghai 201804, P. R. China
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6
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Wang K, Du X, Zhang P, Wei Z, Cao XT. Metal-free C-3 selective C(sp 2)-C(sp 3) heteroarylation of anilines with imidazo[1,2- a]pyridine derivatives via cross-dehydrogenative coupling. RSC Adv 2023; 13:21685-21689. [PMID: 37476046 PMCID: PMC10355276 DOI: 10.1039/d3ra03852a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 07/09/2023] [Indexed: 07/22/2023] Open
Abstract
A general and straightforward method for the regioselective construction of C-3 heteroaryl-containing imidazo[1,2-a]pyridines via cross-dehydrogenative coupling under transition-metal-free conditions has been reported, utilizing N,N-dimethylaniline as the methylenation source and furnishing the C(sp2)-C(sp3) functionalized products in good to excellent yields. Mechanism studies indicate that a radical pathway is responsible for this transformation.
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Affiliation(s)
- Kai Wang
- College of Medical Engineering & the Key Laboratory for Medical Functional Nanomaterials, Jining Medical University Jining 272067 China
| | - Xiaoxue Du
- College of Medical Engineering & the Key Laboratory for Medical Functional Nanomaterials, Jining Medical University Jining 272067 China
| | - Pengfei Zhang
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University Hangzhou 311121 China
| | - Zhenjiang Wei
- Department of Pharmaceutical Engineering, Shandong Medicine Technician College Taian 271016 China
| | - Xian-Ting Cao
- College of Medical Engineering & the Key Laboratory for Medical Functional Nanomaterials, Jining Medical University Jining 272067 China
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7
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Sun M, Liu W, Wu W, Li Q, Shen L. Fe 3O 4@ABA-aniline-CuI nanocomposite as a highly efficient and reusable nanocatalyst for the synthesis of benzothiazole-sulfide aryls and heteroaryls. RSC Adv 2023; 13:20351-20364. [PMID: 37448779 PMCID: PMC10337755 DOI: 10.1039/d3ra03069e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 06/21/2023] [Indexed: 07/15/2023] Open
Abstract
Studying diaryl sulfides and benzothiazoles is important in organic synthesis because numerous natural and medicinal products contain these scaffolds. Over the past few years, research on the synthesis of compounds containing benzothiazole-sulfide aryls, as important biological molecules, has received significant attention. Multicomponent reactions are the most popular strategy for performing difficult reactions and the synthesis of complexed molecules such as benzothiazole-sulfide aryls. In this work, CuI was successfully immobilized on the surface of magnetic Fe3O4 nanoparticles modified with aniline and 4-aminobenzoic acid [Fe3O4@ABA-Aniline-CuI nanocomposite] and its catalytic activity was investigated in the preparation of a broad range of benzothiazole-sulfide aryls and heteroaryls through the one-pot three-component reactions of 2-iodoaniline with carbon disulfide and aryl or heteroaryl iodides in the presence of KOAc as base in PEG-400 as solvent. TEM and SEM images revealed that the shape of the Fe3O4@ABA-Aniline-CuI particles is spherical and the size of the particles is approximately between 12-25 nanometers.
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Affiliation(s)
- Mingzhe Sun
- College of Food and Biology, Changchun Polytechnic Changchun Jilin 130033 China
| | - Wei Liu
- College of computer science, Jilin Normal University Siping Jilin 136000 China
| | - Wei Wu
- College of computer science, Jilin Normal University Siping Jilin 136000 China
| | - Qun Li
- College of Food and Biology, Changchun Polytechnic Changchun Jilin 130033 China
| | - Li Shen
- Institute Chemical and Nanotechnology Beijing China
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8
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Choudhuri T, Paul S, Das S, Pathak DD, Bagdi AK. Visible-Light-Mediated Regioselective C3-H Selenylation of Pyrazolo[1,5- a]pyrimidines Using Erythrosine B as Photocatalyst. J Org Chem 2023. [PMID: 37302135 DOI: 10.1021/acs.joc.3c00720] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A visible-light-induced efficient methodology has been developed for the C-H selenylation of pyrazolo[1,5-a]pyrimidine derivatives employing erythrosine B as the photocatalyst. This is the first report on the regioselective selenylation of pyrazolo[1,5-a]pyrimidines. The efficiency of this methodology for the selenylation of different electron-rich heterocycles like pyrazole, indole, imidazo[1,2-a]pyridine, imidazo[2,1-b]thiazole, and 4-(phenylamino)-2H-chromen-2-one has been also demonstrated. The exploration of erythrosine B as a photocatalyst with a simple and mild procedure, wide substrate scope, and practical applicability and the employment of eco-friendly energy, oxidant, and solvent are the attractive characteristics of this methodology.
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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
| | - Devendra Deo Pathak
- Department of Chemistry & Chemical Biology, Indian Institute of Technology (ISM), Dhanbad 826 004, India
| | - Avik Kumar Bagdi
- Department of Chemistry, University of Kalyani, Kalyani 741235, India
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9
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Jha RK, Batabyal M, Kumar S. Blue Light Irradiated Metal-, Oxidant-, and Base-Free Cross-Dehydrogenative Coupling of C( sp2)-H and N-H Bonds: Amination of Naphthoquinones with Amines. J Org Chem 2023. [PMID: 37171187 DOI: 10.1021/acs.joc.3c00666] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Herein, we report a blue-light-driven amination of C(sp2)-H bond of naphthoquinones and quinones with the N-H bond of primary and secondary amines for the synthesis of 2-amino-naphthoquinones and 2-amino-quinones. The coupling of naphthoquinones with a wide array of aliphatic, aromatic, chiral, primary, and secondary amines having electron donating (-CH3, -OCH3, -SCH3), withdrawing (-F, -Cl, -Br, -I), and CO2H, -OH, -NH2 groups with acidic protons selectively occurred to afford C-N coupled 2-amino-naphthoquinones in 60-99% yields and hydrogen gas as a byproduct in methanol solvent without using any additional reagents, additives, and oxidant under the blue light irradiation. Mechanistic insight by DFT computation, controlled experiments, kinetic isotopic effect, and substitution effect of the substrates suggest that the reaction proceeds by radical pathway in which naphthoquinone forms a highly oxidizing naphthoquinonyl biradical upon irradiation of blue light (457 nm). Consequently, electron transfer from electron-rich amine to an oxidizing naphthoquinonyl biradical leads to a naphthoquinonyl radical anion and aminyl radical cation, followed by proton transfer and delocalization leading to a carbon-centered naphthoquinonyl radical. The cross-coupling of naphthoquinonyl carbon-centered and aminyl nitrogen radicals forms a C-N bond, with subsequent elimination of hydrogen gas (which was also confirmed by GC-TCD), affording 2-amino-1,4-naphthoquinone under metal-, reagent-, base-, and oxidant-free conditions.
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Affiliation(s)
- Raushan Kumar Jha
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal By-pass Road, Bhauri, Bhopal, Madhya Pradesh 462066, India
| | - Monojit Batabyal
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal By-pass Road, Bhauri, Bhopal, Madhya Pradesh 462066, India
| | - Sangit Kumar
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal By-pass Road, Bhauri, Bhopal, Madhya Pradesh 462066, India
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10
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Paul S, Das S, Choudhuri T, Sikdar P, Bagdi AK. Visible-Light-Induced Regioselective C-H Sulfenylation of Pyrazolo[1,5- a]pyrimidines via Cross-Dehydrogenative Coupling. J Org Chem 2023; 88:4187-4198. [PMID: 36916032 DOI: 10.1021/acs.joc.2c02665] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
A visible-light-induced cross-dehydrogenative methodology has been developed for the regioselective sulfenylation of pyrazolo[1,5-a]pyrimidine derivatives. Rose bengal, blue LEDs, KI, K2S2O8, and DMSO are all essential for this photocatalytic transformation. The protocol is applicable for the synthesis of a library of 3-(aryl/heteroaryl thio)pyrazolo[1,5-a]pyrimidine derivatives with broad functionalities. The selectivity and scalability of the methodology have been also demonstrated. Moreover, the efficiency of this strategy for sulfenylation of pyrazoles, indole, imidazoheterocycles, and 4-hydroxy coumarin has been proven. The mechanistic investigation revealed the radical-based mechanism and formation of diaryl disulfide as a key intermediate for this cross-dehydrogenative coupling reaction.
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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
| | | | - Papiya Sikdar
- Department of Chemistry, University of Kalyani, Kalyani 741235, India
| | - Avik Kumar Bagdi
- Department of Chemistry, University of Kalyani, Kalyani 741235, India
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Han X, Guo C, Xu C, Shi L, Liu B, Zhang Z, Bai Q, Song B, Pan F, Lu S, Zhu X, Wang H, Hao XQ, Song MP, Li X. Water-Soluble Metallo-Supramolecular Nanoreactors for Mediating Visible-Light-Promoted Cross-Dehydrogenative Coupling Reactions. ACS NANO 2023; 17:3723-3736. [PMID: 36757357 DOI: 10.1021/acsnano.2c10856] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Water-soluble metallo-supramolecular cages with well-defined nanosized cavities have a wide range of functions and applications. Herein, we design and synthesize two series of metallo-supramolecular octahedral cages based on the self-assembly of two congeneric truxene-derived tripyridyl ligands modified with two polyethylene glycol (PEG) chains, i.e., monodispersed tetraethylene glycol (TEG) and polydispersed PEG-1000, with four divalent transition metals (i.e., Pd, Cu, Ni, and Zn). The resulting monodispersed cages C1-C4 are fully characterized by electrospray ionization mass spectrometry (ESI-MS), nuclear magnetic resonance (NMR) spectroscopy, and single-crystal X-ray diffraction. The polydispersed cages C5-C8 display good water solubilities and can act as nanoreactors to mediate visible-light-promoted C(sp3)-C(sp2) cross-dehydrogenative coupling reactions in an aqueous phase. In particular, the most robust Pd(II)-linked water-soluble polydispersed nanoreactor C5 is characterized by ESI-MS and capable of mediating the reactions with the highest efficiencies. Detailed host-guest binding studies in conjunction with control studies suggest that these cages could encapsulate the substrates simultaneously inside its hydrophobic cavity while interacting with the photosensitizer (i.e., eosin Y).
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Affiliation(s)
- Xin Han
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong 518055, China
| | - Chenxing Guo
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong 518055, China
- School of Biomedical Engineering, Shenzhen University, Shenzhen, Guangdong 518060, China
| | - Chen Xu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, China
| | - Linlin Shi
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Binghui Liu
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Zhe Zhang
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, Guangdong 510006, China
| | - Qixia Bai
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, Guangdong 510006, China
| | - Bo Song
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Fangfang Pan
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Department of Chemistry, Central China Normal University, Wuhan, Hubei 430079, China
| | - Shuai Lu
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong 518055, China
| | - Xinju Zhu
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Heng Wang
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong 518055, China
| | - Xin-Qi Hao
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Mao-Ping Song
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Xiaopeng Li
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong 518055, China
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12
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Tong Z, Peng X, Tang Z, Yang W, Deng W, Yin SF, Kambe N, Qiu R. DTBP-mediated cross-dehydrogenative coupling of 3-aryl benzofuran-2(3 H)-ones with toluenes/phenols for all-carbon quaternary centers. RSC Adv 2022; 12:35215-35220. [PMID: 36540229 PMCID: PMC9732748 DOI: 10.1039/d2ra06231c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 12/02/2022] [Indexed: 12/28/2024] Open
Abstract
We have developed a transition-metal free protocol for efficient cross-dehydrogenative coupling of 3-aryl benzofuran-2(3H)-ones and toluenes/phenols using DTBP as an oxidant. A diverse range of 3-aryl benzofuran-2(3H)-ones, toluenes, and phenols undergo C-H bond cleavage to generate all-carbon quaternary centers in good yields, making this protocol useful for the synthesis of complex molecules. A gram scale experiment was performed in good yield.
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Affiliation(s)
- Zhou Tong
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha 410082 P. R. China
| | - Xinju Peng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha 410082 P. R. China
| | - Zhi Tang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha 410082 P. R. China
| | - Weijun Yang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha 410082 P. R. China
| | - Wei Deng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha 410082 P. R. China
| | - Shuang-Feng Yin
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha 410082 P. R. China
| | - Nobuaki Kambe
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha 410082 P. R. China
| | - Renhua Qiu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University Changsha 410082 P. R. China
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13
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Ranu B, Egorov I, Mukherjee A, Santra S, Kopchuk D, Kovalev I, Zyryanov G, Majee A, Chupakhin O, Liu Y. Mechanochemically Induced Cross Dehydrogenative Coupling Reactions under Ball Milling. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200296] [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)
| | - Ilya Egorov
- Ural Federal University named after the first President of Russia B N Yeltsin RUSSIAN FEDERATION
| | - Anindita Mukherjee
- Ural'skij federal'nyj universitet imeni pervogo Prezidenta Rossii B N El'cina RUSSIAN FEDERATION
| | - Sougata Santra
- Ural Federal University named after the first President of Russia B N Yeltsin RUSSIAN FEDERATION
| | - Dmitry Kopchuk
- Institute of Organic Synthesis UB RAS RUSSIAN FEDERATION
| | | | - Grigory Zyryanov
- Ural Federal University named after the first President of Russia B N Yeltsin RUSSIAN FEDERATION
| | | | - Oleg Chupakhin
- Ural Federal University named after the first President of Russia B N Yeltsin RUSSIAN FEDERATION
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14
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Rahman M, Ghosh S, Bhattacherjee D, Zyryanov GV, Bagdi AK, Hajra A. Recent Advances in Microwave‐assisted Cross‐Coupling Reactions. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200179] [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)
- Matiur Rahman
- Ural Federal University named after the first President of Russia B N Yeltsin: Ural'skij federal'nyj universitet imeni pervogo Prezidenta Rossii B N El'cina Department of Organic and Biomolecular Chemistry RUSSIAN FEDERATION
| | | | - Dhananjay Bhattacherjee
- Ural Federal University named after the first President of Russia B N Yeltsin: Ural'skij federal'nyj universitet imeni pervogo Prezidenta Rossii B N El'cina Department of Organic and Biomolecular Chemistry RUSSIAN FEDERATION
| | - Grigory V. Zyryanov
- Ural Federal University named after the first President of Russia B N Yeltsin: Ural'skij federal'nyj universitet imeni pervogo Prezidenta Rossii B N El'cina Department of Organic and Biomolecular Chemistry RUSSIAN FEDERATION
| | | | - Alakananda Hajra
- Visva-Bharati Chemistry Santiniketan Road 731235 Santiniketan, Bolpur INDIA
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15
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Singh T, Panday P, Upreti GC, Ranjan S, Gupta RK, Singh A. Visible-light-mediated synthesis of α,β-diamino esters via coupling of N, N-dimethylanilines and glyoxalic oxime ethers. Org Biomol Chem 2022; 20:4522-4525. [PMID: 35605977 DOI: 10.1039/d2ob00361a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A visible-light-mediated synthesis of α,β-diamino esters has been developed via the cross coupling of N,N-dimethylanilines with glyoxalic oxime ethers. This protocol involves the generation of α-aminoalkyl radicals under mild reaction conditions, provides α,β-diamino esters in good to excellent yields, and can be performed on a gram-scale.
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Affiliation(s)
- Tavinder Singh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, U. P., 208016, India.
| | - Prabhakar Panday
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, U. P., 208016, India.
| | - Ganesh Chandra Upreti
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, U. P., 208016, India.
| | - Sudhir Ranjan
- Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur, U. P., 208016, India
| | - Raju Kumar Gupta
- Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur, U. P., 208016, India
| | - Anand Singh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, U. P., 208016, India.
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16
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Tran C, Hamze A. Recent Developments in the Photochemical Synthesis of Functionalized Imidazopyridines. Molecules 2022; 27:molecules27113461. [PMID: 35684399 PMCID: PMC9182178 DOI: 10.3390/molecules27113461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 05/20/2022] [Accepted: 05/25/2022] [Indexed: 12/04/2022] Open
Abstract
Imidazopyridines constitute one of the most important scaffolds in medicinal chemistry, as their skeleton could be found in a myriad of biologically active molecules. Although numerous strategies were elaborated for imidazopyridine preparation in the 2010s, novel eco-compatible synthetic approaches have emerged, conscious of climate change concerns. In this framework, photochemical methods have been promoted to conceive this heterocyclic motif over the last decade. This review covers the recently published works on synthesizing highly functionalized imidazopyridines by light induction.
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17
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Ghosh D, Ghosh S, Ghosh A, Pyne P, Majumder S, Hajra A. Visible light-induced functionalization of indazole and pyrazole: a recent update. Chem Commun (Camb) 2022; 58:4435-4455. [PMID: 35294515 DOI: 10.1039/d2cc00002d] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Indazole and pyrazole are renowned as a prodigious class of heterocycles having versatile uses in medicinal as well as industrial chemistry. Considering sustainable approaches, recently, photocatalysis has become an indispensable tool in organic chemistry due to its application for the activation of small molecules and the use of a clean energy source. In this review, we have highlighted the use of metal-based photocatalysts, organic photoredox catalysts, energy transfer photocatalysts and electron-donor-acceptor complexes in the functionalization of indazole and pyrazole. This perspective is arranged based on the types of functionalization reactions on indazole and pyrazole. A detailed discussion regarding the reaction mechanism of each reaction is given to provide a comprehensive guide to the reader. Finally, a summary of existing challenges and the future outlook towards the development of efficient photocatalytic methods for functionalization of these heterocycles is also presented.
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Affiliation(s)
- Debashis Ghosh
- Department of Chemistry, St. Joseph's College (Autonomous), Bangalore 560027, Karnataka, India
| | - Sumit Ghosh
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India.
| | - Anogh Ghosh
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India.
| | - Pranjal Pyne
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India.
| | - Souvik Majumder
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India.
| | - Alakananda Hajra
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India.
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18
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Huang M, Deng L, Lao T, Zhang Z, Su Z, Yu Y, Cao H. Mechanochemically Induced Dehydrogenation Coupling and [3+2] Cycloaddition of Indolizines with Allenes Using Piezoelectric Materials. J Org Chem 2022; 87:3265-3275. [PMID: 35080180 DOI: 10.1021/acs.joc.1c02940] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A wide range of indolizines with allenes proceeded smoothly under mechanochemically induced conditions via a [3+2] annulation process, affording various substituted pyrrolo[2,1,5-cd]indolizines in good yields. The reaction efficiency was greatly improved by using piezoelectric material as the charge transfer catalyst. The photophysical properties of the resulting pyrrolo[2,1,5-cd]indolizine were characterized.
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Affiliation(s)
- Mingzhou Huang
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Centre, Guangdong Pharmaceutical University, Zhongshan 528458, China
| | - Lichan Deng
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Centre, Guangdong Pharmaceutical University, Zhongshan 528458, China
| | - Tianfeng Lao
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Centre, Guangdong Pharmaceutical University, Zhongshan 528458, China
| | - Ziwu Zhang
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Centre, Guangdong Pharmaceutical University, Zhongshan 528458, China
| | - Zhengquan Su
- Guangdong Engineering Research Centre of Natural Products and New Drugs, Guangdong Provincial University Engineering Technology Research Centre of Natural Products and Drugs, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Yue Yu
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Centre, Guangdong Pharmaceutical University, Zhongshan 528458, China
- Guangdong Pharmaceutical University-University of Hong Kong Joint Biomedical Innovation Platform, Zhongshan 528437, China
| | - Hua Cao
- School of Chemistry and Chemical Engineering and Guangdong Cosmetics Engineering & Technology Research Centre, Guangdong Pharmaceutical University, Zhongshan 528458, China
- Guangdong Pharmaceutical University-University of Hong Kong Joint Biomedical Innovation Platform, Zhongshan 528437, China
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19
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Ghosh S, Hajra A. Visible-light-mediated metal-free C–Si bond formation reactions. PHYSICAL SCIENCES REVIEWS 2022. [DOI: 10.1515/psr-2021-0087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Conserving the environment is one of the most imperative goals in recent days among the chemists throughout the world. Swiftly increasing the environmental awareness also increases the demand to build new approaches for synthesizing the same active molecules with zero-waste and pollution. In this background, visible-light-mediated synthesis and functionalization of diverse organic compounds has been established as a tremendously successful topic and has achieved a remarkable stage of superiority and efficiency in the last 20 years. Alternatively, organosilicon derivatives are gradually aspiring leaves among chemists because of their significant application on synthetic, medicinal, and material chemistry. In this scenario, the addition of Si–H group to carbon−carbon multiple bonds (alkenes, hetero-arenes, alkynes, allenes, carboxylic acids, enynes, and dienes) provides an extremely step- and atom-efficient method to obtain silicon-containing compounds. Several attempts for the development of mild, robust, and efficient green protocol were taken in the last two decades. In spite of substantial advancement/research on C–Si bond formation using transition metal catalysis, a green and metal-free approach is highly essential considering its application in the field of medicine and with respect to environmental aspects as well. In this article, we will summarize the reports considering suitable visible-light-mediated metal-free silylation of C–C multiple bonds that includes alkenes, hetero-arenes, alkynes, allenes, enynes, and dienes.
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Affiliation(s)
- Sumit Ghosh
- Department of Chemistry , Visva-Bharati (A Central University) , Santiniketan 731235 , India
| | - Alakananda Hajra
- Department of Chemistry , Visva-Bharati (A Central University) , Santiniketan 731235 , India
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20
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Majumder S, Ghosh S, Pyne P, Ghosh A, Ghosh D, Hajra A. Synthesis of Unsymmetrical Biheteroarenes via Dehydrogenative and Decarboxylative Coupling: a Decade Update. CHEM REC 2021; 22:e202100288. [PMID: 34970849 DOI: 10.1002/tcr.202100288] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 12/13/2021] [Accepted: 12/17/2021] [Indexed: 12/22/2022]
Abstract
The design and development of robust and efficient methods for installing one heterocycle with another is endowed as a ubiquitous and powerful synthetic strategy to access complex organic biheterocycles in recent days due to their pervasive applications in medicinal as well as material chemistry. This perspective presents an overview on the recent findings and developments for the synthesis of unsymmetrical biheteroarenes via dehydrogenative and decarboxylative couplings with literature coverage mainly extending from 2011 to 2021. For simplification of the readers, the article has been subcategorized based on the catalysts used in the reactions.
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Affiliation(s)
- Souvik Majumder
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan, 731235, India
| | - Sumit Ghosh
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan, 731235, India
| | - Pranjal Pyne
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan, 731235, India
| | - Anogh Ghosh
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan, 731235, India
| | - Debashis Ghosh
- Department of Chemistry, St. Joseph's College (Autonomous), Bangalore, 560027, Karnataka, India
| | - Alakananda Hajra
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan, 731235, India
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21
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Deb ML, Saikia BS, Borpatra PJ, Baruah PK. Progress of metal‐free visible‐light‐driven a‐C‐H functionalization of tertiary amines: A decade journey. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100706] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | | | | | - Pranjal K. Baruah
- GUIST, Gauhati University Applied Sciences Gopinath Bordoloi Nagar 781014 Guwahati INDIA
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22
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Kalari S, Shinde AU, Rode HB. Methylene-Tethered Arylsulfonation and Benzotriazolation of Aryl/Heteroaryl C-H Bonds with DMSO as a One-Carbon Surrogate. J Org Chem 2021; 86:17684-17695. [PMID: 34851649 DOI: 10.1021/acs.joc.1c01914] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The Selectfluor-mediated approach toward the synthesis of methylene-tethered arylsulfonation and benzotriazolation of imidazopyridines has been described. The reaction involves imidazopyridine, aryl sulfinate, or benzotriazole and dimethyl sulfoxide (DMSO) in the presence of Selectfluor, where DMSO acts as a one-carbon synthon. The protocol has been extended to the methylene-tethered arylsulfonation and benzotriazolation of β-naphthols. The mechanistic insights show that the intermediate 3-((methylthio)methyl)-2-phenylimidazo[1,2-a]pyridine is generated from imidazopyridine, DMSO, and Selectfluor. The nucleophilic displacement by the aryl sulfinate salt or benzotriazole on the intermediate afforded the product.
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Affiliation(s)
- Saradhi Kalari
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500 007, India.,Academy of Scientific and Innovative Research, Ghaziabad, Uttar Pradesh 201 002, India
| | - Akash U Shinde
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500 007, India
| | - Haridas B Rode
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500 007, India.,Academy of Scientific and Innovative Research, Ghaziabad, Uttar Pradesh 201 002, India
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23
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Ghosh S, Laru S, Hajra A. Ortho C-H Functionalization of 2-Arylimidazo[1,2-a]pyridines. CHEM REC 2021; 22:e202100240. [PMID: 34757691 DOI: 10.1002/tcr.202100240] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 10/19/2021] [Accepted: 10/25/2021] [Indexed: 11/09/2022]
Abstract
C-H activation and functionalization is quite promising in recent days as the strategy offers a go-to general method for different bond formations and hence grants synthetic versatility. At the same time, imidazopyridine, a fused bicycle of imidazole moiety with pyridine ring, has a profound impact due to its ubiquitous and prodigious application in medicinal as well as material chemistry. The presence of N-1 atom in 2-arylImidazo[1,2-a]pyridine facilitates the coordination with metal catalysts leading to the formation of ortho-substituted products. This review summarizes all the articles on ortho C-H functionalization of 2-arylImidazo[1,2-a]pyridines published till August 2021.
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Affiliation(s)
- Sumit Ghosh
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan, 731235, India
| | - Sudip Laru
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan, 731235, India
| | - Alakananda Hajra
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan, 731235, India
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24
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Guo X, Shao BR, Jiang WF, Shi L. The Photocatalyst-Free Cross-Dehydrogenative Coupling Reaction Enabled by Visible-Light Direct Excitation of Substrate. J Org Chem 2021; 86:15743-15752. [PMID: 34694134 DOI: 10.1021/acs.joc.1c01775] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new photocatalyst-free strategy for the cross-dehydrogenative C-C and C-P coupling reaction has been described. This protocol provides a concise method to synthesize various 1-substituted tetrahydroisoquinoline (THIQ) derivatives enabled by visible-light direct excitation of substrates without using any photocatalyst. Moreover, a wide substrate scope demonstrated good synthetic versatility and practicality.
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Affiliation(s)
- Xuan Guo
- School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Bing-Ru Shao
- School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Wen-Feng Jiang
- School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Lei Shi
- School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, P. R. China
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25
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Ghosh D, Ghosh S, Hajra A. Electrochemical Functionalization of Imidazopyridine and Indazole: An Overview. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100981] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Debashis Ghosh
- Department of Chemistry St. Joseph's College (Autonomous) Bangalore 560027 Karnataka India
| | - Sumit Ghosh
- Department of Chemistry Visva-Bharati (A Central University) Santiniketan 731235 India
| | - Alakananda Hajra
- Department of Chemistry Visva-Bharati (A Central University) Santiniketan 731235 India
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26
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Ding Y, Kuang J, Xiao X, Wang L, Ma Y. Environmentally Benign Synthesis of Quinoline-Spiroquinazolinones by Iron-Catalyzed Dehydrogenative [4 + 2] Cycloaddition of Secondary/Tertiary Anilines and 4-Methylene-quinazolinones. J Org Chem 2021; 86:12257-12266. [PMID: 34387487 DOI: 10.1021/acs.joc.1c01602] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report an efficient iron-catalyzed cross-dehydrogenative coupling [4 + 2] annulation of secondary/tertiary anilines with quinazolinones to generate quinoline-spiroquinzolinones. The reaction proceeds smoothly with a relatively broad variety of functional groups, a cheap transition metal catalyst (FeCl3), and environmentally friendly oxidant (H2O2/O2) under mild reaction conditions. Creatively, N-methylanilines are employed for the first time for the cycloaddition as both methyl and methylene sources attached to the N atom of tetrahydroquinolines.
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Affiliation(s)
- Yuxin Ding
- Institute of Advanced Studies and School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 318000, P R China.,School of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou 310053, P R China
| | - Jinqiang Kuang
- Institute of Advanced Studies and School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 318000, P R China
| | - Xuqiong Xiao
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, No. 2318 Yuhangtang Road, Hangzhou 311121, P R China
| | - Lei Wang
- Institute of Advanced Studies and School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 318000, P R China
| | - Yongmin Ma
- Institute of Advanced Studies and School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 318000, P R China.,School of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou 310053, P R China
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27
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Zhang HY, Chen J, Lu CC, Han YP, Zhang Y, Zhao J. Visible-Light-Induced C(sp 2)-C(sp 3) Cross-Dehydrogenative-Coupling Reaction of N-Heterocycles with N-Alkyl- N-methylanilines under Mild Conditions. J Org Chem 2021; 86:11723-11735. [PMID: 34369160 DOI: 10.1021/acs.joc.1c01207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Disclosed herein is a cross-dehydrogenative-coupling reaction of N-heterocycles including 1,2,4-triazine-3,5(2H, 4H)-diones and quinoxaline-2(1H)-ones with N-methylanilines to form C(sp2)-C(sp3) under visible-light illumination and ambient air at room temperature. In this process, easily available Ru(bpy)3Cl2·6H2O serves as the catalyst, and air acts as the green oxidant. This method features high atom economy, environmental friendliness, and convenient operation and provides an efficient and practical access to aminomethyl-substituted N-heterocycles with extensive functional group compatibility in 40-86% yields.
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Affiliation(s)
- Hong-Yu Zhang
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy Saving, Tianjin Key Laboratory of Chemical Process Safety, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Jianjun Chen
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy Saving, Tianjin Key Laboratory of Chemical Process Safety, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Cong-Cong Lu
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy Saving, Tianjin Key Laboratory of Chemical Process Safety, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Ya-Ping Han
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy Saving, Tianjin Key Laboratory of Chemical Process Safety, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Yuecheng Zhang
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy Saving, Tianjin Key Laboratory of Chemical Process Safety, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Jiquan Zhao
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy Saving, Tianjin Key Laboratory of Chemical Process Safety, Hebei University of Technology, Tianjin 300130, P. R. China
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28
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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: 0.8] [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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29
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Kumar Hota S, Jinan D, Prakash Panda S, Pan R, Sahoo B, Murarka S. Organophotoredox‐Catalyzed Late‐Stage Functionalization of Heterocycles. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100234] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Sudhir Kumar Hota
- Department of Chemistry Indian Institute of Technology (IIT) Jodhpur 342037 Karwar Rajasthan India
| | - Dilsha Jinan
- School of Chemistry Indian Institute of Science Education and Research (IISER) Thiruvananthapuram 695551 Thiruvananthapuram Kerala India
| | - Satya Prakash Panda
- Department of Chemistry Indian Institute of Technology (IIT) Jodhpur 342037 Karwar Rajasthan India
| | - Rittwika Pan
- Department of Chemistry Indian Institute of Technology (IIT) Jodhpur 342037 Karwar Rajasthan India
| | - Basudev Sahoo
- School of Chemistry Indian Institute of Science Education and Research (IISER) Thiruvananthapuram 695551 Thiruvananthapuram Kerala India
| | - Sandip Murarka
- Department of Chemistry Indian Institute of Technology (IIT) Jodhpur 342037 Karwar Rajasthan India
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30
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Gan Z, Zhu X, Yan Q, Song X, Yang D. Oxidative dual C–H sulfenylation: A strategy for the synthesis of bis(imidazo[1,2-a]pyridin-3-yl)sulfanes under metal-free conditions using sulfur powder. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.12.046] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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31
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Yuan Y, Zhang S, Sun Z, Su Y, Ma Q, Yuan Y, Jia X. Oxidation of the inert sp 3 C-H bonds of tetrahydroisoquinolines through C-H activation relay (CHAR): construction of functionalized isoquinolin-1-ones. Chem Commun (Camb) 2021; 57:3347-3350. [PMID: 33659968 DOI: 10.1039/d1cc00550b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A TBN/O2-initiated oxidation of the relatively inert 3,4-C-H bonds of THIQs was accomplished, in which the existence of an α-phosphoric ester group is crucial to enable dioxygen trapping and intramolecular HAT (C-H activation relay, CHAR), realizing the synthesis of a series of isoquinolin-1-ones in high yields. The mechanistic study confirmed that the formation of the 3,4-double bond is mediated by the CHAR process. This work provides a new strategy to achieve remote C-H bond activation.
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Affiliation(s)
- Yuan Yuan
- School of Chemistry & Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu 225002, China.
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32
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Chaubey NR, Kapdi AR, Maity B. Organophotoredox-Catalyzed C–H Alkylation of Imidazoheterocycles with Malonates: Total Synthesis of Zolpidem. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/s-0040-1706103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
AbstractOrganophotocatalytic C–H bond functionalization has attracted a lot of attention in the past several years due to the possibility of catalyzing reactions in a metal- and peroxide-free environment. Continuing on these lines, an organophotoredox-catalyzed C–H functionalization of imidazo[1,2-a]pyridines and related heterocycles with bromomalonates under mild conditions is reported, providing excellent yields of the products at room temperature. This is the first report involving malonates as coupling partners leading to the synthesis of a range of functionalized products including total synthesis of zolpidem, a sedative-hypnotic drug molecule.
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Affiliation(s)
| | - Anant R. Kapdi
- Institute of Chemical Technology, Department of Chemistry
| | - Biswanath Maity
- Translational Cell Biology Unit, Centre of Biomedical Research
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33
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Konwar D, Bora U. Recent Developments in Transition‐Metal‐Catalyzed Regioselective Functionalization of Imidazo[1, 2‐
a
]pyridine. ChemistrySelect 2021. [DOI: 10.1002/slct.202100144] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Dipika Konwar
- Department of Chemical Sciences Tezpur University, Napaam, Tezpur PIN 784028 Assam India
| | - Utpal Bora
- Department of Chemical Sciences Tezpur University, Napaam, Tezpur PIN 784028 Assam India
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34
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Wang H, Ying P, Yu J, Su W. Alternative Strategies Enabling Cross-Dehydrogenative Coupling: Access to C—C Bonds. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202009053] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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35
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Chen Y, Xia L, Chang Y, Ma W, Wang B. Application of N-Alkyl Amines as Versatile Building Blocks in Oxidative Coupling Reactions. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202009034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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36
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Ma CH, Chen M, Feng ZW, Zhang Y, Wang J, Jiang YQ, Yu B. Functionalization of imidazo[1,2-a]pyridines via radical reactions. NEW J CHEM 2021. [DOI: 10.1039/d1nj00704a] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The recent advances in radical reactions for the direct functionalization of imidazo[1,2-a]pyridines are reviewed.
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Affiliation(s)
- Chun-Hua Ma
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical
- Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials
| | - Ming Chen
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical
- Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials
| | - Zhi-Wen Feng
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical
- Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials
| | - Yan Zhang
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical
- Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials
| | - Jin Wang
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical
- Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials
| | - Yu-Qin Jiang
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical
- Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials
| | - Bing Yu
- Green Catalysis Centre
- College of Chemistry
- Zhengzhou University
- Zhengzhou 450001
- China
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37
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Abstract
This review summarizes the recent findings and developments in the emerging area of photocatalytic silylation with literature coverage mainly extending from 2014 to February 2021.
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Affiliation(s)
- Sumit Ghosh
- Department of Chemistry
- Visva-Bharati (A Central University)
- Santiniketan 731235
- India
| | - Dipti Lai
- Department of Chemistry
- Visva-Bharati (A Central University)
- Santiniketan 731235
- India
| | - Alakananda Hajra
- Department of Chemistry
- Visva-Bharati (A Central University)
- Santiniketan 731235
- India
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38
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Lai D, Ghosh S, Hajra A. Light-induced borylation: developments and mechanistic insights. Org Biomol Chem 2021; 19:4397-4428. [PMID: 33913460 DOI: 10.1039/d1ob00323b] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Organoboron compounds are very important derivatives because of their profound impacts on medicinal, biological as well as industrial applications. The development of several novel borylation methodologies has achieved momentous interest among synthetic chemists. In this scenario, eco-friendly light-induced borylation is progressively becoming one of the best synthetic tools in recent days to prepare organoboronic ester and acid derivatives based on green chemistry rules. In this article, we have discussed all the UV- and visible-light-induced borylation strategies developed in the last decade. Furthermore, special attention is given to the mechanisms of these borylation methodologies for better understanding of reaction insights.
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Affiliation(s)
- Dipti Lai
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India.
| | - Sumit Ghosh
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India.
| | - Alakananda Hajra
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India.
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39
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Ibrahim HM, Behbehani H. Palladium-Catalyzed Q-Tube-Assisted Protocol for Synthesizing Diaza-dibenzo[ a, e]azulene and Diaza-benzo[ a]fluorene Derivatives via O 2 Acid-Promoted Cross-Dehydrogenative Coupling. J Org Chem 2020; 85:15368-15381. [PMID: 33147024 DOI: 10.1021/acs.joc.0c02186] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
An appropriate and efficient Q-tube-assisted palladium-catalyzed strategy for the synthesis of novel, unparalleled diaza-dibenzo[a,e]azulene and diaza-benzo[a]fluorene derivatives has been sophisticated, which includes oxygen and AcOH-induced oxidative C(sp3)-C(sp2) cross-dehydrogenative coupling reactions of 1-amino-2-imino-4-arylpyridine-3-carbonitriles with benzocyclic ketones such as benzosuberone, tetralone, thiochromone, and chromone, respectively. This Q-tube gas purging kit assisted-protocol features safe due to easy pressing and sealing, a wide substrate scope, easy workup and purifying phases, and the use of O2 as a benign oxidant, in addition to being scalable and having a high atom economy. The suggested mechanistic pathway includes a formal dehydrative step followed by palladium AcOH-induced CH(sp3)-CH(sp2) oxidative cross-coupling. In this study, X-ray crystallographic analysis has been used to authenticate the targeted products.
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Affiliation(s)
- Hamada Mohamed Ibrahim
- Chemistry Department, Faculty of Science, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait.,Chemistry Department, Faculty of Science, Fayoum University, P.O. Box 63514, Fayoum 63514, Egypt
| | - Haider Behbehani
- Chemistry Department, Faculty of Science, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait
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40
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Ghosh S, Samanta S, Ghosh AK, Neogi S, Hajra A. Advances in Oxosulfonylation Reaction. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000647] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Sumit Ghosh
- Department of Chemistry Visva-Bharati (A Central University) Santiniketan 731235 India
| | - Sadhanendu Samanta
- Department of Chemistry Visva-Bharati (A Central University) Santiniketan 731235 India
| | - Asim Kumar Ghosh
- Department of Chemistry Visva-Bharati (A Central University) Santiniketan 731235 India
| | - Sukanya Neogi
- Department of Chemistry Visva-Bharati (A Central University) Santiniketan 731235 India
| | - Alakananda Hajra
- Department of Chemistry Visva-Bharati (A Central University) Santiniketan 731235 India
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41
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Batra A, Singh KN. Recent Developments in Transition Metal‐Free Cross‐Dehydrogenative Coupling Reactions for C–C Bond Formation. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000785] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Aanchal Batra
- PG Department of Chemistry Mehr Chand Mahajan DAV College for Women Sec 36/A 160036 Chandigarh India
| | - Kamal Nain Singh
- Department of Chemistry and Centre of Advanced studies in Chemistry Panjab University 160014 Chandigarh India
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42
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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: 13.4] [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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43
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Bhattacharjee S, Laru S, Samanta S, Singsardar M, Hajra A. Visible light-induced photocatalytic C–H ethoxycarbonylmethylation of imidazoheterocycles with ethyl diazoacetate. RSC Adv 2020; 10:27984-27988. [PMID: 35519122 PMCID: PMC9055643 DOI: 10.1039/d0ra05795a] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 07/21/2020] [Indexed: 12/30/2022] Open
Abstract
A visible-light-promoted regioselective ethoxycarbonylmethylation of imidazoheterocycles has been developed using an α-diazoester via a radical pathway.
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Affiliation(s)
- Suvam Bhattacharjee
- Department of Chemistry
- Visva-Bharati (A Central University)
- Santiniketan
- India
| | - Sudip Laru
- Department of Chemistry
- Visva-Bharati (A Central University)
- Santiniketan
- India
| | - Sadhanendu Samanta
- Department of Chemistry
- Visva-Bharati (A Central University)
- Santiniketan
- India
| | - Mukta Singsardar
- Department of Chemistry
- Visva-Bharati (A Central University)
- Santiniketan
- India
| | - Alakananda Hajra
- Department of Chemistry
- Visva-Bharati (A Central University)
- Santiniketan
- India
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44
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Yu ZY, Zhao JN, Yang F, Tang XF, Wu YF, Ma CF, Song B, Yun L, Meng QW. Rose bengal as photocatalyst: visible light-mediated Friedel–Crafts alkylation of indoles with nitroalkenes in water. RSC Adv 2020; 10:4825-4831. [PMID: 35495280 PMCID: PMC9049176 DOI: 10.1039/c9ra09227g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 01/21/2020] [Indexed: 11/21/2022] Open
Abstract
A novel and facile visible-light-mediated alkylation of indoles and nitroalkenes has been developed. In this protocol, rose bengal acts as a photosensitizer, and environmentally benign water was used as the green and efficient reaction medium. Indoles reacted smoothly with nitroalkenes under the irradiation of visible-light and generated corresponding 3-(2-nitroalkyl)indoles in moderate to good yields (up to 87%). A novel and facile visible-light-mediated alkylation of indoles and nitroalkenes has been developed.![]()
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Affiliation(s)
- Zong-Yi Yu
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Jing-Nan Zhao
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Fan Yang
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Xiao-Fei Tang
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Yu-Feng Wu
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Cun-Fei Ma
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Bo Song
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Lei Yun
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Qing-Wei Meng
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
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45
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Bagdi AK, Hajra A. Visible light promoted C–H functionalization of imidazoheterocycles. Org Biomol Chem 2020; 18:2611-2631. [DOI: 10.1039/d0ob00246a] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The present review summarizes the visible light mediated direct C–H functionalizations of pharmacologically active imidazo[1,2-a]pyridines and other related heterocycles.
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Affiliation(s)
| | - Alakananda Hajra
- Department of Chemistry
- Visva-Bharati (A Central University)
- Santiniketan 731235
- India
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46
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Xu JT, Xu GQ, Wang ZY, Xu PF. Visible Light Photoredox-Catalyzed α-Alkylation of Cyclic Tertiary Arylamines. J Org Chem 2019; 84:14760-14769. [PMID: 31642323 DOI: 10.1021/acs.joc.9b02347] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An efficient method was successfully developed to obtain cyclic β-amino ketones via visible-light photoredox catalysis. With this catalytic system, vinyl azides and N-Ph pyrrolidines react to form cyclic β-amino ketones by α-amino radical addition. This method provides a simple, mild, straightforward, and novel paradigm to prepare important β-amino ketones.
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Affiliation(s)
- Ji-Tao Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , Gansu 730000 , P. R. China
| | - Guo-Qiang Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , Gansu 730000 , P. R. China
| | - Zhu-Yin Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , Gansu 730000 , P. R. China
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , Gansu 730000 , P. R. China
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47
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Kibriya G, Ghosh D, Hajra A. Visible-light-promoted oxidative coupling of styrene with cyclic ethers. Sci China Chem 2019. [DOI: 10.1007/s11426-019-9609-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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48
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Behbehani H, Ibrahim HM. Synthetic Strategy for Pyrazolo[1,5- a]pyridine and Pyrido[1,2- b]indazole Derivatives through AcOH and O 2-Promoted Cross-dehydrogenative Coupling Reactions between 1,3-Dicarbonyl Compounds and N-Amino-2-iminopyridines. ACS OMEGA 2019; 4:15289-15303. [PMID: 31552376 PMCID: PMC6751734 DOI: 10.1021/acsomega.9b02430] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 08/21/2019] [Indexed: 05/12/2023]
Abstract
An efficient method has been developed for the synthesis of uniquely substituted pyrazolo[1,5-a]pyridine and pyrido[1,2-b]indazole derivatives, which involves acetic acid and molecular oxygen promoted cross-dehydrogenative coupling reactions of respective β-ketoesters and β-diketones (like ethyl acetoacetate, ethyl benzoylacetate, methyl propionylacetate, acetylacetone, dimedone, 1,3-cyclohexanedione, and 1,3-cyclopentanedione) with N-amino-2-iminopyridines. The proposed tentative mechanism involves formal acetic acid-promoted oxidative C(sp3)-C(sp2) dehydrogenative coupling followed by dehydrative cyclization under a catalyst-free condition within high atom economy processes.
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Affiliation(s)
- Haider Behbehani
- Chemistry
Department, Faculty of Science, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait
| | - Hamada Mohamed Ibrahim
- Chemistry
Department, Faculty of Science, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait
- Chemistry
Department, Faculty of Science, Fayoum University, P.O. Box 63514, Fayoum, Egypt
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49
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Gan Z, Yan Q, Li G, Li Q, Dou X, Li G, Yang D. Copper‐Catalyzed Domino Synthesis of Sulfur‐Containing Heterocycles Using Carbon Disulfide as a Building Block. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900643] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ziyu Gan
- School of Chemistry and Chemical EngineeringQufu Normal University Qufu 273165 People's Republic of China
| | - Qiuli Yan
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular EngineeringQingdao University of Science and Technology Qingdao 266042 People's Republic of China
- School of Chemistry and Chemical EngineeringQufu Normal University Qufu 273165 People's Republic of China
| | - Guoqing Li
- School of Chemistry and Chemical EngineeringQufu Normal University Qufu 273165 People's Republic of China
| | - Qin Li
- School of Chemistry and Chemical EngineeringQufu Normal University Qufu 273165 People's Republic of China
| | - Xiaomeng Dou
- School of Chemistry and Chemical EngineeringHunan University of Science and Technology Xiangtan 411201 People's Republic of China
| | - Guang‐Yao Li
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and TransportationChangsha University of Science and Technology Changsha 410114 People's Republic of China
| | - Daoshan Yang
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular EngineeringQingdao University of Science and Technology Qingdao 266042 People's Republic of China
- School of Chemistry and Chemical EngineeringQufu Normal University Qufu 273165 People's Republic of China
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50
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Ibrahim HM, Behbehani H. Sustainable Synthetic Approach for (Pyrazol-4-ylidene)pyridines By Metal Catalyst-Free Aerobic C(sp 2)-C(sp 3) Coupling Reactions between 1-Amino-2-imino-pyridines and 1-Aryl-5-pyrazolones. ACS OMEGA 2019; 4:11701-11711. [PMID: 31460276 PMCID: PMC6682090 DOI: 10.1021/acsomega.9b01650] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 06/21/2019] [Indexed: 05/26/2023]
Abstract
A novel, metal catalyst-free, and efficient method has been developed for the synthesis of (pyrazol-4-ylidene)pyridine derivatives. The process involves dehydrogenative coupling of 1-amino-2-imino-pyridines with 1-aryl-5-pyrazolone derivatives utilizing O2 as the sole oxidant. The new method benefits from a high atom economy, efficiency, and substrate scope, as well as the simplicity of reaction and product purification procedures.
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Affiliation(s)
- Hamada Mohamed Ibrahim
- Chemistry
Department, Faculty of Science, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait
- Chemistry
Department, Faculty of Science, Fayoum University, P.O. Box 63514, Fayoum, Egypt
| | - Haider Behbehani
- Chemistry
Department, Faculty of Science, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait
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