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Akter M, Rupa K, Anbarasan P. 1,2,3-Triazole and Its Analogues: New Surrogates for Diazo Compounds. Chem Rev 2022; 122:13108-13205. [DOI: 10.1021/acs.chemrev.1c00991] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Monalisa Akter
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
| | - Kavuri Rupa
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
| | - Pazhamalai Anbarasan
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
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2
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Jenifer VR, Muthuvel P, Das TM. Rational Design of Heterocyclic Moieties Incorporated in [1,2,3]Sugar‐Triazole Derivatives for Antioxidant Studies. ChemistrySelect 2021. [DOI: 10.1002/slct.202102516] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- V. Rabecca Jenifer
- Department of Chemistry School of Basic and Applied Sciences Central University of Tamil Nadu (CUTN) Thiruvarur 610 005 INDIA
| | - Panneerselvam Muthuvel
- Department of Organic Chemistry University of Madras, Guindy Campus Chennai 600 025 INDIA
| | - Thangamuthu Mohan Das
- Department of Chemistry School of Basic and Applied Sciences Central University of Tamil Nadu (CUTN) Thiruvarur 610 005 INDIA
- Department of Organic Chemistry University of Madras, Guindy Campus Chennai 600 025 INDIA
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3
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Agrahari AK, Bose P, Jaiswal MK, Rajkhowa S, Singh AS, Hotha S, Mishra N, Tiwari VK. Cu(I)-Catalyzed Click Chemistry in Glycoscience and Their Diverse Applications. Chem Rev 2021; 121:7638-7956. [PMID: 34165284 DOI: 10.1021/acs.chemrev.0c00920] [Citation(s) in RCA: 154] [Impact Index Per Article: 51.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Copper(I)-catalyzed 1,3-dipolar cycloaddition between organic azides and terminal alkynes, commonly known as CuAAC or click chemistry, has been identified as one of the most successful, versatile, reliable, and modular strategies for the rapid and regioselective construction of 1,4-disubstituted 1,2,3-triazoles as diversely functionalized molecules. Carbohydrates, an integral part of living cells, have several fascinating features, including their structural diversity, biocompatibility, bioavailability, hydrophilicity, and superior ADME properties with minimal toxicity, which support increased demand to explore them as versatile scaffolds for easy access to diverse glycohybrids and well-defined glycoconjugates for complete chemical, biochemical, and pharmacological investigations. This review highlights the successful development of CuAAC or click chemistry in emerging areas of glycoscience, including the synthesis of triazole appended carbohydrate-containing molecular architectures (mainly glycohybrids, glycoconjugates, glycopolymers, glycopeptides, glycoproteins, glycolipids, glycoclusters, and glycodendrimers through regioselective triazole forming modular and bio-orthogonal coupling protocols). It discusses the widespread applications of these glycoproducts as enzyme inhibitors in drug discovery and development, sensing, gelation, chelation, glycosylation, and catalysis. This review also covers the impact of click chemistry and provides future perspectives on its role in various emerging disciplines of science and technology.
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Affiliation(s)
- Anand K Agrahari
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Priyanka Bose
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Manoj K Jaiswal
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Sanchayita Rajkhowa
- Department of Chemistry, Jorhat Institute of Science and Technology (JIST), Jorhat, Assam 785010, India
| | - Anoop S Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Srinivas Hotha
- Department of Chemistry, Indian Institute of Science and Engineering Research (IISER), Pune, Maharashtra 411021, India
| | - Nidhi Mishra
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Vinod K Tiwari
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
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4
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Tiwari VK. Development of Diverse Range of Biologically Relevant Carbohydrate-Containing Molecules: Twenty Years of Our Journey*. CHEM REC 2021; 21:3029-3048. [PMID: 34047444 DOI: 10.1002/tcr.202100058] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 04/02/2021] [Indexed: 11/12/2022]
Abstract
There is an increasing demand for significant amount of carbohydrate-containing molecules owing to their complete chemical, biological, and pharmacological investigations to better understand their role in many important biological events. Clinical studies of a wide range of simple carbohydrates or their derivatives, glycohybrids, glycoconjugates, and neoglycoconjugates have been conducted worldwide for the successful treatment of various frontline diseases. Herein, a brief perspective of carbohydrate-based molecular scaffolding and my experience during the last 20 years in the area of synthetic carbohydrate chemistry, mainly for their impact in drug discovery & development, is presented.
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Affiliation(s)
- Vinod K Tiwari
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, U.P.-221005, India
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5
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Kumar H, Dhameja M, Rizvi M, Gupta P. Progress in the Synthesis of Fused 1,2,3‐Triazoles. ChemistrySelect 2021. [DOI: 10.1002/slct.202100442] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Hariom Kumar
- Department of Chemistry School of Physical & Decision Sciences Babasaheb Bhimrao Ambedkar University (A Central University) Rae barelli Road Lucknow 226025, U. P. India
| | - Manoj Dhameja
- Department of Chemistry School of Physical & Decision Sciences Babasaheb Bhimrao Ambedkar University (A Central University) Rae barelli Road Lucknow 226025, U. P. India
| | - Marziya Rizvi
- Department of Chemistry School of Physical & Decision Sciences Babasaheb Bhimrao Ambedkar University (A Central University) Rae barelli Road Lucknow 226025, U. P. India
| | - Preeti Gupta
- Department of Chemistry School of Physical & Decision Sciences Babasaheb Bhimrao Ambedkar University (A Central University) Rae barelli Road Lucknow 226025, U. P. India
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6
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Yan G, Tiwari VK, Yu J, Singh AS, Yu J. Recent Developments on Denitrogenative Functionalization of Benzotriazoles. SYNTHESIS-STUTTGART 2020. [DOI: 10.1055/s-0040-1707253] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
AbstractBenzotriazoles are employed as useful synthons in organic synthesis, and due to their unique structural motif, they are able to undergo denitrogenation during the construction of new bonds. Various methods for the functionalization of benzotriazoles as precursors of ortho-amino arenediazoniums have recently been developed that involve transition-metal-catalyzed coupling reactions, mainly via cyclization, borylation, alkenylation, alkylation, carbonylation and the formation of carbon–heteroatom bonds. In this short review, we primarily focus on the recent applications of benzotriazoles in organic chemistry that proceed via a denitrogenative process, and the mechanisms are also discussed.1 Introduction2 Common Synthetic Routes Allowing Easy Access to Benzotriazole Derivatives3 Formation of C–C Bonds3.1 Cyclization Reactions3.2 Arylation, Alkenylation, Alkylation and Carbonylation Reactions4 Carbon–Heteroatom Bond Formation5 Miscellaneous Denitrogenative Functionalization6 Conclusions and Future Perspectives
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7
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Li W, Zhang J. Synthesis of Heterocycles through Denitrogenative Cyclization of Triazoles and Benzotriazoles. Chemistry 2020; 26:11931-11945. [DOI: 10.1002/chem.202000674] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 05/07/2020] [Indexed: 11/11/2022]
Affiliation(s)
- Wenbo Li
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University 3663 N. Zhongshan Road Shanghai 20062 P. R. China
| | - Junliang Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University 3663 N. Zhongshan Road Shanghai 20062 P. R. China
- Department of ChemistryFudan University 2005 Songhu Road Shanghai 20048 P. R. China
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8
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Zhu X, Zhou F, Yang Y, Deng G, Liang Y. Catalyst- and Additive-Free Method for the Synthesis of 2-Substituted Benzothiazoles from Aromatic Amines, Aliphatic Amines, and Elemental Sulfur. ACS OMEGA 2020; 5:13136-13147. [PMID: 32548500 PMCID: PMC7288589 DOI: 10.1021/acsomega.0c01150] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Accepted: 05/04/2020] [Indexed: 06/11/2023]
Abstract
Under catalyst- and additive-free conditions, a novel, convenient, environmentally friendly method was developed for the synthesis of 2-substituted benzothiazoles via the three-component one pot reaction from aromatic amines, aliphatic amines, and elemental sulfur. The reaction achieves double C-S and one C-N bond formations via cleavage of two C-N bonds and multiple C-H bonds. Furthermore, the mechanism research shows that DMSO acts as an oxidant in the cyclization reaction.
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Affiliation(s)
- Xiaoming Zhu
- National
and Local Joint Engineering Laboratory for New Petro-chemical Materials
and Fine Utilization of Resources, Key Laboratory of Chemical Biology
and Traditional Chinese Medicine Research, Ministry of Education,
Key Laboratory of the Assembly and Application of Organic Functional
Molecules of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, Hunan 410081, China
- Key
Laboratory of Functional Metal-Organic Compounds of Hunan Province,
Hunan Province Universities Key Laboratory of Functional Organometallic
Materials, College of Chemistry and Material Science, Hengyang Normal University, Hengyang, Hunan 421008, China
| | - Fengru Zhou
- National
and Local Joint Engineering Laboratory for New Petro-chemical Materials
and Fine Utilization of Resources, Key Laboratory of Chemical Biology
and Traditional Chinese Medicine Research, Ministry of Education,
Key Laboratory of the Assembly and Application of Organic Functional
Molecules of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, Hunan 410081, China
| | - Yuan Yang
- National
and Local Joint Engineering Laboratory for New Petro-chemical Materials
and Fine Utilization of Resources, Key Laboratory of Chemical Biology
and Traditional Chinese Medicine Research, Ministry of Education,
Key Laboratory of the Assembly and Application of Organic Functional
Molecules of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, Hunan 410081, China
| | - Guobo Deng
- National
and Local Joint Engineering Laboratory for New Petro-chemical Materials
and Fine Utilization of Resources, Key Laboratory of Chemical Biology
and Traditional Chinese Medicine Research, Ministry of Education,
Key Laboratory of the Assembly and Application of Organic Functional
Molecules of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, Hunan 410081, China
| | - Yun Liang
- National
and Local Joint Engineering Laboratory for New Petro-chemical Materials
and Fine Utilization of Resources, Key Laboratory of Chemical Biology
and Traditional Chinese Medicine Research, Ministry of Education,
Key Laboratory of the Assembly and Application of Organic Functional
Molecules of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, Hunan 410081, China
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9
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Singh M, Bose P, Singh AS, Tiwari VK. Synthesis of 1-(2-bromo-1-arylethyl)-1H-benzotriazoles via NBS promoted addition of 1H-benzotriazole to alkene: Relevance in benzotriazole ring cleavage. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131078] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Elgemeie GH, Azzam RA, Osman RR. Recent advances in synthesis, metal complexes and biological evaluation of 2-aryl, 2-pyridyl and 2-pyrimidylbenzothiazoles as potential chemotherapeutics. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2019.119302] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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11
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Liu X, Dong ZB. A Review on Domino Condensation/Cyclization Reactions for the Synthesis of 2-Substituted 1,3-Benzothiazole Derivatives. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901502] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xing Liu
- School of Chemistry and Environmental Engineering; Wuhan Institute of Technology; 430205 Wuhan China
| | - Zhi-Bing Dong
- School of Chemistry and Environmental Engineering; Wuhan Institute of Technology; 430205 Wuhan China
- Key Laboratory of Green Chemical Process; Ministry of Education; Wuhan Institute of Technology; 430205 Wuhan China
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules; Ministry of Education; Hubei University; 430062 Wuhan China
- Hubei Key Laboratory of Novel Reactor and Green Chemistry Technology; Ministry of Education; Wuhan Institute of Technology; 430205 Wuhan China
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12
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Wang Y, Wang Z, Tang Y. Renaissance of Ring-Opening Chemistry of Benzotriazoles: New Wine in an Old Bottle. CHEM REC 2020; 20:693-709. [PMID: 31916676 DOI: 10.1002/tcr.201900088] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 12/11/2019] [Accepted: 12/16/2019] [Indexed: 12/18/2022]
Abstract
1,2,3-Benzotriazoles could undergo ring cleavage to form ortho-amino arenediazonium or α-diazo-imine species via a Dimroth-type equilibrium. Historically, the synthetic potential of this unique reactivity had remained underdeveloped. Recently, some new strategies have been developed to effect the ring-opening chemistry of benzotriazoles in more practical manners. A wide range of conceptually novel and synthetically useful reactions have been developed, which enable the access to diverse valuable heterocycles and ortho-amino arene derivatives. As one of the players in this field, our group has also contributed a series of intriguing transition-metal-catalyzed denitrogenative functionalizations of benzotriazoles. In this account, we aim to provide an overview of the ring-opening chemistry of benzotriazoles, with a focus on relevant works published in the past decade. In order to show a whole picture of the research field, some pioneering works in its developing history will also be discussed briefly.
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Affiliation(s)
- Yuanhao Wang
- School of Pharmaceutical Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing, 100084, China
| | - Zhiguo Wang
- School of Pharmaceutical Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing, 100084, China
| | - Yefeng Tang
- School of Pharmaceutical Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing, 100084, China
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13
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Agrahari AK, Singh AK, Singh AS, Singh M, Maji P, Yadav S, Rajkhowa S, Prakash P, Tiwari VK. Click inspired synthesis of p-tert-butyl calix[4]arene tethered benzotriazolyl dendrimers and their evaluation as anti-bacterial and anti-biofilm agents. NEW J CHEM 2020. [DOI: 10.1039/d0nj02591g] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
CuAAC inspired calix-[4]arene tethered benzotriazolyl dendrimers were developed and investigated for their therapeutic potential, where 7 displayed potent anti-bacterial and anti-biofilm activities against drug-resistant & slime producing organisms.
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Affiliation(s)
- Anand K. Agrahari
- Department of Chemistry
- Centre of Advanced Study
- Institute of Science
- Banaras Hindu University
- Varanasi-221005
| | - Ashish K. Singh
- Bacterial Biofilm and Drug Resistance Research Laboratory
- Department of Microbiology, Institute of Medical Sciences
- Banaras Hindu University
- Varanasi-221005
- India
| | - Anoop S. Singh
- Department of Chemistry
- Centre of Advanced Study
- Institute of Science
- Banaras Hindu University
- Varanasi-221005
| | - Mala Singh
- Department of Chemistry
- Centre of Advanced Study
- Institute of Science
- Banaras Hindu University
- Varanasi-221005
| | - Pathik Maji
- Department of Chemistry
- Guru Ghasidas University
- Bilaspur-495009
- India
| | - Shivangi Yadav
- Bacterial Biofilm and Drug Resistance Research Laboratory
- Department of Microbiology, Institute of Medical Sciences
- Banaras Hindu University
- Varanasi-221005
- India
| | - Sanchayita Rajkhowa
- Department of Chemistry
- Jorhat Institute of Science and Technology
- Jorhat-785010
- India
| | - Pradyot Prakash
- Bacterial Biofilm and Drug Resistance Research Laboratory
- Department of Microbiology, Institute of Medical Sciences
- Banaras Hindu University
- Varanasi-221005
- India
| | - Vinod K. Tiwari
- Department of Chemistry
- Centre of Advanced Study
- Institute of Science
- Banaras Hindu University
- Varanasi-221005
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14
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Singh M, Bose P, Singh AS, Tiwari VK. 1‐(Hydroxymethyl)‐1
H
‐benzotriazole: An Efficient Ligand for Copper‐Catalyzed Ullmann‐Type Coupling Reaction Leading to Expeditious Synthesis of Diverse Benzoxazoles and Benzothiazoles. ChemistrySelect 2019. [DOI: 10.1002/slct.201902420] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mala Singh
- Department of ChemistryInstitute of ScienceBanaras Hindu University, Varansi Uttar Pradesh-221005 INDIA
| | - Priyanka Bose
- Department of ChemistryInstitute of ScienceBanaras Hindu University, Varansi Uttar Pradesh-221005 INDIA
| | - Anoop S. Singh
- Department of ChemistryInstitute of ScienceBanaras Hindu University, Varansi Uttar Pradesh-221005 INDIA
| | - Vinod K. Tiwari
- Department of ChemistryInstitute of ScienceBanaras Hindu University, Varansi Uttar Pradesh-221005 INDIA
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15
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Ma X, Yu J, Yan R, Yan M, Xu Q. Promoting Effect of Crystal Water Leading to Catalyst-Free Synthesis of Heteroaryl Thioether from Heteroaryl Chloride, Sodium Thiosulfate Pentahydrate, and Alcohol. J Org Chem 2019; 84:11294-11300. [PMID: 31393123 DOI: 10.1021/acs.joc.9b01670] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
It is observed the crystal water in sodium thiosulfate pentahydrate (Na2S2O3·5H2O) can promote its multicomponent reaction with heteroaryl chlorides and alcohols, providing a facile, green, and specific synthesis of unsymmetrical heteroaryl thioethers via one-step formation of two C-S bonds under catalyst-, additive-, and solvent-free conditions. Mechanistic studies suggest that the crystal water in Na2S2O3·5H2O is crucial in generating the key thiol intermediates and byproduct NaHSO4, which then catalyzes the dehydrative substitution of alcohols with thiols to afford thioethers.
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Affiliation(s)
- Xiantao Ma
- College of Chemistry and Materials Engineering , Wenzhou University , Wenzhou , Zhejiang 325035 , China.,College of Chemistry and Chemical Engineering , Xinyang Normal University , Xinyang , Henan 464000 , China.,School of Chemistry and Chemical Engineering , Yangzhou University , Yangzhou , Jiangsu 225002 , China
| | - Jing Yu
- College of Chemistry and Chemical Engineering , Xinyang Normal University , Xinyang , Henan 464000 , China
| | - Ran Yan
- College of Chemistry and Chemical Engineering , Xinyang Normal University , Xinyang , Henan 464000 , China
| | - Mengli Yan
- College of Chemistry and Chemical Engineering , Xinyang Normal University , Xinyang , Henan 464000 , China
| | - Qing Xu
- College of Chemistry and Materials Engineering , Wenzhou University , Wenzhou , Zhejiang 325035 , China.,School of Chemistry and Chemical Engineering , Yangzhou University , Yangzhou , Jiangsu 225002 , China
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16
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Yadav M, Singh AS, Agrahari AK, Mishra N, Tiwari VK. Silicon Industry Waste Polymethylhydrosiloxane-Mediated Benzotriazole Ring Cleavage: A Practical and Green Synthesis of Diverse Benzothiazoles. ACS OMEGA 2019; 4:6681-6689. [PMID: 31459794 PMCID: PMC6648665 DOI: 10.1021/acsomega.9b00343] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 03/29/2019] [Indexed: 06/10/2023]
Abstract
A green modification has been introduced to the synthesis of benzothiazoles by using polymethylhydrosiloxane (PMHS) for successive steps of benzotriazole ring cleavage and cyclization, an approach which was previously developed in our lab by the use of n-Bu3SnH. The use of the silicone industry byproduct PMHS makes this protocol a cost-effective and nontoxic one and thus may be considered for the industrial importance.
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17
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Mishra KB, Tiwari N, Bose P, Singh R, Rawat AK, Singh SK, Mishra RC, Singh RK, Tiwari VK. Design, Synthesis and Pharmacological Evaluation of Noscapine Glycoconjugates. ChemistrySelect 2019. [DOI: 10.1002/slct.201803588] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Kunj B Mishra
- Department of ChemistryInstitute of ScienceBanaras Hindu University, Varanasi U.P.–221005 INDIA
| | - Neeraj Tiwari
- Department of BiochemistryInstitute of ScienceBanaras Hindu University, Varanasi U.P.–221005 INDIA
| | - Priyanka Bose
- Department of ChemistryInstitute of ScienceBanaras Hindu University, Varanasi U.P.–221005 INDIA
| | - Rajan Singh
- Department of BiochemistryInstitute of ScienceBanaras Hindu University, Varanasi U.P.–221005 INDIA
| | - Arun K Rawat
- Department of BiochemistryInstitute of ScienceBanaras Hindu University, Varanasi U.P.–221005 INDIA
| | - Sumit K. Singh
- Department of ChemistryInstitute of ScienceBanaras Hindu University, Varanasi U.P.–221005 INDIA
| | - Ram C. Mishra
- College of PharmacyUniversity of Georgia, Athens GA 30602 USA
| | - Rakesh K Singh
- Department of BiochemistryInstitute of ScienceBanaras Hindu University, Varanasi U.P.–221005 INDIA
| | - Vinod K. Tiwari
- Department of ChemistryInstitute of ScienceBanaras Hindu University, Varanasi U.P.–221005 INDIA
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18
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Singh M, Singh AS, Mishra N, Agrahari AK, Tiwari VK. Benzotriazole as an Efficient Ligand in Cu-Catalyzed Glaser Reaction. ACS OMEGA 2019; 4:2418-2424. [PMID: 31459480 PMCID: PMC6648008 DOI: 10.1021/acsomega.8b03410] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 01/22/2019] [Indexed: 06/10/2023]
Abstract
Benzotriazole has been established as an efficient ligand in Cu-catalyzed cross-coupling of terminal alkynes to form 1,3-dialkynes using CuI as the catalyst and K2CO3 as the base at room temperature in an open round-bottom flask. The established protocol has the following notable advantages: simple to handle, easy work-up, mild reaction condition, high substrate scope, requirement of less quantity of ligand and also Cu-catalyst, less expensive, and high reaction yield.
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Affiliation(s)
- Mala Singh
- Department of Chemistry, Institute
of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Anoop S. Singh
- Department of Chemistry, Institute
of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Nidhi Mishra
- Department of Chemistry, Institute
of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Anand K. Agrahari
- Department of Chemistry, Institute
of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Vinod K. Tiwari
- Department of Chemistry, Institute
of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
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19
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Singh AS, Mishra N, Yadav MS, Tiwari VK. Free Radical Synthetic Protocol for Benzothiazoles
via
Ring Opening of Benzotriazole: A Two‐step Organic Chemistry Experiment for Undergraduate and Postgraduate Students. J Heterocycl Chem 2018. [DOI: 10.1002/jhet.3405] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Anoop S. Singh
- Department of Chemistry, Institute of ScienceBanaras Hindu University Varanasi 221005 India
| | - Nidhi Mishra
- Department of Chemistry, Institute of ScienceBanaras Hindu University Varanasi 221005 India
| | - Mangal S. Yadav
- Department of Chemistry, Institute of ScienceBanaras Hindu University Varanasi 221005 India
| | - Vinod K. Tiwari
- Department of Chemistry, Institute of ScienceBanaras Hindu University Varanasi 221005 India
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20
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Kumar D, Singh AS, Tiwari VK. An Improved Synthetic Protocol for Benzothiazoles via Ring Opening of Benzotriazole. ChemistrySelect 2018. [DOI: 10.1002/slct.201801241] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Dhananjay Kumar
- Department of ChemistryInstitute of ScienceBanaras Hindu University, Varanasi Uttar Pradesh-221005 India
- Department of ChemistryAnugrah Memorial CollegeMagadh University Gaya-110007 India
| | - Anoop S. Singh
- Department of ChemistryInstitute of ScienceBanaras Hindu University, Varanasi Uttar Pradesh-221005 India
| | - Vinod K. Tiwari
- Department of ChemistryInstitute of ScienceBanaras Hindu University, Varanasi Uttar Pradesh-221005 India
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21
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Chatgilialoglu C, Ferreri C, Landais Y, Timokhin VI. Thirty Years of (TMS)3SiH: A Milestone in Radical-Based Synthetic Chemistry. Chem Rev 2018; 118:6516-6572. [DOI: 10.1021/acs.chemrev.8b00109] [Citation(s) in RCA: 138] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | - Carla Ferreri
- ISOF, Consiglio Nazionale delle Ricerche, Via P. Gobetti 101, 40129 Bologna, Italy
| | - Yannick Landais
- University of Bordeaux, Institute of Molecular Sciences, UMR-CNRS 5255, 351 cours de la libération, 33405 Talence Cedex, France
| | - Vitaliy I. Timokhin
- Department of Biochemistry, University of Wisconsin-Madison, 1552 University Avenue, Madison, Wisconsin 53726, United States
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22
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Min H, Xiao G, Liu W, Liang Y. Copper-catalyzed synthesis of 2-aminobenzothiazoles from 2-iodophenyl isocyanides, potassium sulfide and amines. Org Biomol Chem 2018; 14:11088-11091. [PMID: 27872926 DOI: 10.1039/c6ob02413k] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple and practically useful synthetic method for the synthesis of a variety of 2-aminobenzothiazoles was developed. This methodology could construct one C-N bond and two C-S bonds in a step reaction and provide the desired products in good to perfect yields.
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Affiliation(s)
- Hao Min
- Key Laboratory of the Assembly and Application of Organic Functional Molecules, Hunan Normal University, Changsha, Hunan 410081, China.
| | - Genhua Xiao
- Key Laboratory of the Assembly and Application of Organic Functional Molecules, Hunan Normal University, Changsha, Hunan 410081, China.
| | - Wenjuan Liu
- Key Laboratory of the Assembly and Application of Organic Functional Molecules, Hunan Normal University, Changsha, Hunan 410081, China.
| | - Yun Liang
- Key Laboratory of the Assembly and Application of Organic Functional Molecules, Hunan Normal University, Changsha, Hunan 410081, China.
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23
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Dadmal TL, Katre SD, Mandewale MC, Kumbhare RM. Contemporary progress in the synthesis and reactions of 2-aminobenzothiazole: a review. NEW J CHEM 2018. [DOI: 10.1039/c7nj03776g] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Various protocols for the synthesis and reactions of 2-aminobenzothiazole.
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Affiliation(s)
- Tulshiram L. Dadmal
- Department of Chemistry
- Government of Maharashtra's
- Ismail Yusuf College
- Mumbai 400060
- India
| | - Sangita D. Katre
- Department of Chemistry
- Chhotabhai Javerbhai Patel College
- Gondia 441911
- India
| | - Mustapha C. Mandewale
- Department of Chemistry
- Government of Maharashtra's
- Ismail Yusuf College
- Mumbai 400060
- India
| | - Ravindra M. Kumbhare
- Fluoroorganics Division
- Indian Institute of Chemical Technology
- Hyderabad 500607
- India
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24
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Singh A, Mishra N, Kumar D, Tiwari VK. Lewis-Acid-Mediated Benzotriazole Ring Cleavage (BtRC) Strategy for the Synthesis of 2-Aryl Benzoxazoles from N-Acylbenzotriazoles. ACS OMEGA 2017; 2:5044-5051. [PMID: 31457781 PMCID: PMC6641914 DOI: 10.1021/acsomega.7b00965] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 08/14/2017] [Indexed: 05/15/2023]
Abstract
A Lewis-acid-mediated ring cleavage of acylbenzotriazoles (RCOBt) followed by cyclization to corresponding benzoxazoles was achieved in good to excellent yields. The reaction was found consistent with the milligram to gram scale.
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25
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Kumar A, Ahmed QN. A Benzoquinone Imine Assisted Ring-Opening/Ring-Closing Strategy of the RCOCHN1
N2
System: Dinitrogen Extrusion Reaction to Benzimidazoles. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700357] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Atul Kumar
- Medicinal Chemistry Division; Indian Institute of Integrative Medicine (IIIM); Canal Road 180001 Jammu Jammu & Kashmir India
- Academy of Scientific and Innovative Research (AcSIR); Indian Institute of Integrative Medicine (IIIM); Canal Road 180001 Jammu Jammu & Kashmir India
| | - Qazi Naveed Ahmed
- Medicinal Chemistry Division; Indian Institute of Integrative Medicine (IIIM); Canal Road 180001 Jammu Jammu & Kashmir India
- Academy of Scientific and Innovative Research (AcSIR); Indian Institute of Integrative Medicine (IIIM); Canal Road 180001 Jammu Jammu & Kashmir India
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26
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Wang Y, Wu Y, Li Y, Tang Y. Denitrogenative Suzuki and carbonylative Suzuki coupling reactions of benzotriazoles with boronic acids. Chem Sci 2017; 8:3852-3857. [PMID: 28966777 PMCID: PMC5578364 DOI: 10.1039/c7sc00367f] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 03/10/2017] [Indexed: 11/21/2022] Open
Abstract
Unprecedented palladium-catalyzed denitrogenative Suzuki and carbonylative Suzuki coupling reactions of benzotriazoles with boronic acids have been realized, which afforded structurally diverse ortho-amino-substituted biaryl and biaryl ketone derivatives. The key to this success is due to the development of a rationally designed strategy to achieve the ring opening of benzotriazoles with a synergistic activating-stabilizing effect, which enables the in situ generation of the corresponding ortho-amino-arenediazonium species. The present work opens up a new avenue to utilize benzotriazoles as synthetic equivalents of ortho-amino-arenediazoniums, which otherwise could not be directly accessed by existing synthetic methods.
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Affiliation(s)
- Yuanhao Wang
- School of Pharmaceutical Sciences , Tsinghua University , Beijing 100084 , China .
| | - Yunfei Wu
- Collaborative Innovation Center for Biotherapy , State Key Laboratory of Biotherapy and Cancer Center , West China Medical School , Sichuan University , Chengdu 610041 , China
| | - Yuanhe Li
- School of Pharmaceutical Sciences , Tsinghua University , Beijing 100084 , China .
| | - Yefeng Tang
- School of Pharmaceutical Sciences , Tsinghua University , Beijing 100084 , China .
- Collaborative Innovation Center for Biotherapy , State Key Laboratory of Biotherapy and Cancer Center , West China Medical School , Sichuan University , Chengdu 610041 , China
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27
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Singh AS, Kumar D, Mishra N, Tiwari VK. An Unprecedented Synthesis ofN-Phenyl AmidesviaCleavage of Benzotriazole Ring under Free Radical Condition. ChemistrySelect 2017. [DOI: 10.1002/slct.201601830] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Anoop S. Singh
- Department of Chemistry, Institute of Science; Banaras Hindu University; Varanasi- 221005 India
| | - Dhananjay Kumar
- Department of Chemistry, Institute of Science; Banaras Hindu University; Varanasi- 221005 India
- Department of Chemistry; University of Delhi; New Delhi India
| | - Nidhi Mishra
- Department of Chemistry, Institute of Science; Banaras Hindu University; Varanasi- 221005 India
| | - Vinod K. Tiwari
- Department of Chemistry, Institute of Science; Banaras Hindu University; Varanasi- 221005 India
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28
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Singh AS, Singh M, Mishra N, Mishra S, Agrahari AK, Tiwari VK. N-Acylbenzotriazole as Efficient Ligand in Copper-CatalyzedO-Arylation Leading to Diverse Benzoxazoles. ChemistrySelect 2017. [DOI: 10.1002/slct.201601116] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Anoop S. Singh
- Department of Chemistry, Institute of Science; Banaras Hindu University; Varanasi- 221005 India
| | - Mala Singh
- Department of Chemistry, Institute of Science; Banaras Hindu University; Varanasi- 221005 India
| | - Nidhi Mishra
- Department of Chemistry, Institute of Science; Banaras Hindu University; Varanasi- 221005 India
| | - Snigdha Mishra
- Department of Chemistry, Institute of Science; Banaras Hindu University; Varanasi- 221005 India
| | - Anand K. Agrahari
- Department of Chemistry, Institute of Science; Banaras Hindu University; Varanasi- 221005 India
| | - Vinod K. Tiwari
- Department of Chemistry, Institute of Science; Banaras Hindu University; Varanasi- 221005 India
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29
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Dar AA, Shadab M, Khan S, Ali N, Khan AT. One-Pot Synthesis and Evaluation of Antileishmanial Activities of Functionalized S-Alkyl/Aryl Benzothiazole-2-carbothioate Scaffold. J Org Chem 2016; 81:3149-60. [PMID: 26999637 DOI: 10.1021/acs.joc.6b00113] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The synthesis of hitherto unreported S-alkyl/aryl benzothiazole-2-carbothioate is reported from thiols, oxalyl chloride, and 2-aminothiophenols using 10 mol % n-tetrabutylammonium iodide (TBAI) as catalyst in acetonitrile through multicomponent reaction (MCR) strategy. The present protocol favored formation of benzothiazoles and thioesters via simultaneous formation of C-N and C-S bonds in good yields with a wide range of substrates. A few of the synthesized derivatives were evaluated for their antimicrobial activity against the protozoan parasite Leishmania donovani, a causative agent of visceral leishmaniasis (VL). Further, these compounds displayed no toxicity toward macrophage RAW 264.7 cells and are therefore nontoxic and effective antileishmanial leads. In silico docking studies were performed to understand the possible binding site interaction with trypanothione reductase (TryR).
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Affiliation(s)
- Ajaz A Dar
- Department of Chemistry, Indian Institute of Technology Guwahati , Guwahati 781 039, India
| | - M Shadab
- Infectious Diseases and Immunology Division, Indian Institute of Chemical Biology , 4, Raja S.C. Mullick Road, Kolkata 700 032, India
| | - Suman Khan
- Department of Chemistry, Pohang University of Science and Technology , Pohang, 37673, Republic of South Korea
| | - Nahid Ali
- Infectious Diseases and Immunology Division, Indian Institute of Chemical Biology , 4, Raja S.C. Mullick Road, Kolkata 700 032, India
| | - Abu T Khan
- Department of Chemistry, Indian Institute of Technology Guwahati , Guwahati 781 039, India
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30
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Tiwari VK, Mishra BB, Mishra KB, Mishra N, Singh AS, Chen X. Cu-Catalyzed Click Reaction in Carbohydrate Chemistry. Chem Rev 2016; 116:3086-240. [PMID: 26796328 DOI: 10.1021/acs.chemrev.5b00408] [Citation(s) in RCA: 523] [Impact Index Per Article: 65.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Cu(I)-catalyzed azide-alkyne 1,3-dipolar cycloaddition (CuAAC), popularly known as the "click reaction", serves as the most potent and highly dependable tool for facile construction of simple to complex architectures at the molecular level. Click-knitted threads of two exclusively different molecular entities have created some really interesting structures for more than 15 years with a broad spectrum of applicability, including in the fascinating fields of synthetic chemistry, medicinal science, biochemistry, pharmacology, material science, and catalysis. The unique properties of the carbohydrate moiety and the advantages of highly chemo- and regioselective click chemistry, such as mild reaction conditions, efficient performance with a wide range of solvents, and compatibility with different functionalities, together produce miraculous neoglycoconjugates and neoglycopolymers with various synthetic, biological, and pharmaceutical applications. In this review we highlight the successful advancement of Cu(I)-catalyzed click chemistry in glycoscience and its applications as well as future scope in different streams of applied sciences.
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Affiliation(s)
- Vinod K Tiwari
- Department of Chemistry, Centre of Advanced Study, Institute of Science, Banaras Hindu University , Varanasi, Uttar Pradesh-221005, India
| | - Bhuwan B Mishra
- Department of Chemistry, Centre of Advanced Study, Institute of Science, Banaras Hindu University , Varanasi, Uttar Pradesh-221005, India
| | - Kunj B Mishra
- Department of Chemistry, Centre of Advanced Study, Institute of Science, Banaras Hindu University , Varanasi, Uttar Pradesh-221005, India
| | - Nidhi Mishra
- Department of Chemistry, Centre of Advanced Study, Institute of Science, Banaras Hindu University , Varanasi, Uttar Pradesh-221005, India
| | - Anoop S Singh
- Department of Chemistry, Centre of Advanced Study, Institute of Science, Banaras Hindu University , Varanasi, Uttar Pradesh-221005, India
| | - Xi Chen
- Department of Chemistry, One Shields Avenue, University of California-Davis , Davis, California 95616, United States
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31
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Singh AS, Kumar D, Mishra N, Tiwari VK. An efficient one-pot synthesis of N,N′-disubstituted ureas and carbamates from N-acylbenzotriazoles. RSC Adv 2016. [DOI: 10.1039/c6ra14131e] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A facile one-pot synthesis of carbamates and N,Nʹ-disubstituted symmetrical ureas from N-acylbenzotriazoles has been devised. It is believed that, the intermediate acyl-azide undergo Curtius rearrangement.
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Affiliation(s)
- Anoop S. Singh
- Department of Chemistry
- Centre of Advanced Study
- Institute of Science
- Banaras Hindu University
- Varanasi-221005
| | | | - Nidhi Mishra
- Department of Chemistry
- Centre of Advanced Study
- Institute of Science
- Banaras Hindu University
- Varanasi-221005
| | - Vinod K. Tiwari
- Department of Chemistry
- Centre of Advanced Study
- Institute of Science
- Banaras Hindu University
- Varanasi-221005
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32
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Battula S, Kumar A, Gupta AP, Ahmed QN. 2-Oxo-Driven N2 Elimination Induced Decarbonylative Cyclization Reaction in Benzotriazoles to 6-Aminophenanthridines. Org Lett 2015; 17:5562-5. [DOI: 10.1021/acs.orglett.5b02699] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Satyanarayana Battula
- Medicinal
Chemistry Division, Indian Institute of Integrative Medicine (IIIM), Jammu 180001, India
- Academy of Scientific and Innovative Research (AcSIR), Jammu, India
| | - Atul Kumar
- Medicinal
Chemistry Division, Indian Institute of Integrative Medicine (IIIM), Jammu 180001, India
- Academy of Scientific and Innovative Research (AcSIR), Jammu, India
| | | | - Qazi Naveed Ahmed
- Medicinal
Chemistry Division, Indian Institute of Integrative Medicine (IIIM), Jammu 180001, India
- Academy of Scientific and Innovative Research (AcSIR), Jammu, India
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33
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Yoon H, Lee Y. Copper-Catalyzed Electrophilic Amination of Heteroarenes via C-H Alumination. J Org Chem 2015; 80:10244-51. [PMID: 26421609 DOI: 10.1021/acs.joc.5b01863] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A highly efficient Cu-catalyzed electrophilic amination reaction of readily available heteroarenes with O-benzoyl hydroxylamines via a one-pot C-H alumination is reported. The reactions were catalyzed using 1 mol % of CuCl to afford various heteroaryl amines in good to excellent yields. The direct C-H lithiation/transalumination of heteroarenes and catalytic amination sequence can be performed in a single vessel on gram scales.
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Affiliation(s)
- Hongju Yoon
- Department of Chemistry, Kwangwoon University , Seoul 01897, Republic of Korea
| | - Yunmi Lee
- Department of Chemistry, Kwangwoon University , Seoul 01897, Republic of Korea
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34
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Mishra KB, Mishra RC, Tiwari VK. First noscapine glycoconjugates inspired by click chemistry. RSC Adv 2015. [DOI: 10.1039/c5ra07321a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The first click chemistry-inspired noscapine glycoconjugates have been developed in good to excellent yields to increase the therapeutic efficacy of noscapine.
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Affiliation(s)
- Kunj B. Mishra
- Department of Chemistry
- Centre of Advanced Study
- Faculty of Science
- Banaras Hindu University
- Varanasi-221005
| | | | - Vinod K. Tiwari
- Department of Chemistry
- Centre of Advanced Study
- Faculty of Science
- Banaras Hindu University
- Varanasi-221005
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35
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Kumar D, Singh AS, Tiwari VK. An unprecedented deoxygenation protocol of benzylic alcohols using bis(1-benzotriazolyl)methanethione. RSC Adv 2015. [DOI: 10.1039/c5ra01545f] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new method of silane or Bu3SnH promoted radical deoxygenation of benzylic alcohols using bis(1-benzotriazolyl)methanethione has been developed.
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Affiliation(s)
- Dhananjay Kumar
- Department of Chemistry
- Faculty of Science
- Banaras Hindu University
- Varanasi
- India
| | - Anoop S. Singh
- Department of Chemistry
- Faculty of Science
- Banaras Hindu University
- Varanasi
- India
| | - Vinod K. Tiwari
- Department of Chemistry
- Faculty of Science
- Banaras Hindu University
- Varanasi
- India
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36
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Fluorogenic dual click derived bis-glycoconjugated triazolocoumarins for selective recognition of Cu(II) ion. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.06.052] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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37
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Mishra KB, Tiwari VK. Click Chemistry Inspired Synthesis of Morpholine-Fused Triazoles. J Org Chem 2014; 79:5752-62. [DOI: 10.1021/jo500890w] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Kunj B. Mishra
- Department of Chemistry,
Centre of Advanced Study, Faculty of Science, Banaras Hindu University, Varanasi-221005, India
| | - Vinod K. Tiwari
- Department of Chemistry,
Centre of Advanced Study, Faculty of Science, Banaras Hindu University, Varanasi-221005, India
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