1
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Guo T, Hu P, Liu Y, Zhang P, Zhao Y, Zhu C. Ketosulfonylmethylenation and sulfonylethyleneation of imidazoheterocycles with dimethylformamide as a methylene source. Chem Commun (Camb) 2023; 59:12455-12458. [PMID: 37781868 DOI: 10.1039/d3cc03850e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
A hitherto unreported ketosulfonylmethylenation occurring at the C-3 position of imidazoheterocycles, with dimethylformamide as the methylene source was described. Using CoCl2·6H2O or Fe(acac)3 as efficient and inexpensive catalysts, some important biologically active methylenated compounds were prepared, with high efficacy, favorable functional group compatibilities, and a broad substrate scope.
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Affiliation(s)
- Tao Guo
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
| | - Penghua Hu
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
| | - Yu Liu
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
| | - Panke Zhang
- Green Catalysis Center, College of Chemistry, Henan Advanced Institute of Technology, Zhengzhou University, Zhengzhou 450001, PR China
| | - Yunhui Zhao
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, P. R. China
| | - Congjun Zhu
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
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2
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Tali JA, Kumar G, Sharma BK, Rasool Y, Sharma Y, Shankar R. Synthesis and site selective C-H functionalization of imidazo-[1,2- a]pyridines. Org Biomol Chem 2023; 21:7267-7289. [PMID: 37655687 DOI: 10.1039/d3ob00849e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Imidazo[1,2-a]pyridine has attracted much interest in drug development because of its potent medicinal properties, therefore the discovery of novel methods for its synthesis and functionalization continues to be an exciting area of research. Although transition metal catalysis has fuelled the most significant developments, extremely beneficial metal-free approaches have also been identified. Even though pertinent reviews focused on imidazo[1,2-a]pyridine synthesis, properties (physicochemical and medicinal), and functionalization at the C3 position have been published, none of these reviews has focused on the outcomes obtained in the field of global ring functionalization. We wish here to describe a brief synthesis and an overview of all the functionalization reactions at each carbon atom, viz, C2, C3, C5, C6, C7 and C8 of this scaffold, divided into sections based on site-selectivity and the type of functionalization methods used.
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Affiliation(s)
- Javeed Ahmad Tali
- Natural Product and Medicinal Chemistry Division (NPMC), CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Gulshan Kumar
- Natural Product and Medicinal Chemistry Division (NPMC), CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Bhupesh Kumar Sharma
- Natural Product and Medicinal Chemistry Division (NPMC), CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Younis Rasool
- Natural Product and Medicinal Chemistry Division (NPMC), CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Yashika Sharma
- Natural Product and Medicinal Chemistry Division (NPMC), CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India.
| | - Ravi Shankar
- Natural Product and Medicinal Chemistry Division (NPMC), CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
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3
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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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4
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Tali JA, Shankar R. Ru(II)-Catalyzed Synthesis of Fused Imidazo[1,2- a]pyridine-chromenones and Methylene-Tethered Bis-imidazo[1,2- a]pyridines and Regioselective O-Acetoxylation of Imidazo[1,2- a]pyridines. Org Lett 2023; 25:3200-3205. [PMID: 37140128 DOI: 10.1021/acs.orglett.3c00578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Herein, we disclose an unprecedented protocol via ruthenium-catalyzed annulation for the synthesis of 6H-chromeno[4',3':4,5]imidazo[1,2-a]pyridin-6-one, and functionalized 2-(3-formylimidazo[1,2-a]pyridin-2-yl)phenyl acetate has been revealed by intramolecular chelation-assisted C-H activation. Additionally, a one-pot approach for creating bis(2-phenylimidazo[1,2-a]pyridin-3-yl)methane (BIP) has been realized through ruthenium catalysis with the use of formic acid. This method was used in gram-scale synthesis of BIP and step-economical late-stage functionalization of a marketed drug, zolimidine, in good yield.
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Affiliation(s)
- Javeed Ahmad Tali
- Academy of Scientific and Industrial Research (AcSIR), Ghaziabad 201002, India
- Natural Product & Medicinal Chemistry, CSIR-Indian Institute of Integrative Medicine, Jammu 180001, India
| | - Ravi Shankar
- Academy of Scientific and Industrial Research (AcSIR), Ghaziabad 201002, India
- Natural Product & Medicinal Chemistry, CSIR-Indian Institute of Integrative Medicine, Jammu 180001, India
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5
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Kazi I, Nandy A, Selvam R, Sekar G. Halogen Bond-Activated Visible-Light-Mediated Regioselective C-H Arylation of 2-Phenylimidazo-[1,2- a]pyridines. J Org Chem 2022; 87:12323-12333. [PMID: 36065525 DOI: 10.1021/acs.joc.2c01548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient method for transition metal-free halogen bond-assisted regioselective C-H arylation of 2-phenylimidazo-[1,2-a]pyridines under visible-light condition has been developed. The halogen bond between an aryl halide and base KOtBu initiates an electron transfer process and generates an aryl radical, which catalyzes its coupling with 2-phenylimidazo-[1,2-a]pyridines to give arylated products in good yield. Several control experiments, density functional theory calculations, and ultraviolet-visible analysis indicate the presence of a halogen bond between an aryl halide and KOtBu. This methodology has been successfully utilized to synthesize antileishmanial agents.
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Affiliation(s)
- Imran Kazi
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600 036, India
| | - Anuradha Nandy
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600 036, India
| | - Raji Selvam
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600 036, India
| | - Govindasamy Sekar
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600 036, India
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Feng Z, Deng L, Wei J, Wu Y, Jiang Z, Wang Y. Metal- and additive-free direct C3-aminomethylation of imidazo[1,2-a]pyridines with 1,3,5-triazinanes. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153790] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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7
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Cao X, Zheng Z, Liu J, Hu Y, Yu H, Cai S, Wang G. H
2
O
2
‐Mediated Synthesis of 1,2,4‐Thiadiazole Derivatives in Ethanol at Room Temperature. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202101455] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Xian‐Ting Cao
- College of Medical Engineering& the Key Laboratory for Medical Functional Nanomaterials Jining Medical University Jining 272067 People's Republic of China
| | - Zuo‐Ling Zheng
- College of Medical Engineering& the Key Laboratory for Medical Functional Nanomaterials Jining Medical University Jining 272067 People's Republic of China
| | - Jie Liu
- College of Medical Engineering& the Key Laboratory for Medical Functional Nanomaterials Jining Medical University Jining 272067 People's Republic of China
| | - Yu‐He Hu
- College of Medical Engineering& the Key Laboratory for Medical Functional Nanomaterials Jining Medical University Jining 272067 People's Republic of China
| | - Hao‐Yun Yu
- College of Medical Engineering& the Key Laboratory for Medical Functional Nanomaterials Jining Medical University Jining 272067 People's Republic of China
| | - Shasha Cai
- College of Medical Engineering& the Key Laboratory for Medical Functional Nanomaterials Jining Medical University Jining 272067 People's Republic of China
| | - Guannan Wang
- College of Medical Engineering& the Key Laboratory for Medical Functional Nanomaterials Jining Medical University Jining 272067 People's Republic of China
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8
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Shi T, Liu Y, Wang S, Lv Q, Yu B. Recyclable Carbon Nitride
Nanosheet‐Photocatalyzed
Aminomethylation of Imidazo[1,2‐
a
]pyridines in Green Solvent. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202100444] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Tao Shi
- School of Biology, College of Chemistry Zhengzhou University Zhengzhou Henan 450001 China
- Institute of Chemistry Henan Academy of Sciences Zhengzhou Henan 450002 China
| | - Yu‐Ting Liu
- School of Biology, College of Chemistry Zhengzhou University Zhengzhou Henan 450001 China
| | - Shan‐Shan Wang
- Beijing Institute of Technology Analysis & Testing Center, Beijing Institute of Technology Beijing 100081 China
| | - Qi‐Yan Lv
- School of Biology, College of Chemistry Zhengzhou University Zhengzhou Henan 450001 China
| | - Bing Yu
- School of Biology, College of Chemistry Zhengzhou University Zhengzhou Henan 450001 China
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9
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Yao H, Zhong X, Wang B, Lin S, Liu L, Yan Z. Manganese-catalyzed dehydrogenative Csp 3-Csp 2 coupling of imidazo[1,2- a]pyridines with methyl ketones. Org Biomol Chem 2021; 19:3479-3483. [PMID: 33899882 DOI: 10.1039/d1ob00169h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A Mn(ii)-catalyzed efficient C-H alkylation of imidazoheterocycles with methyl ketones has been developed via dehydrogenative C(sp3)-C(sp2) coupling which can serve as a novel approach toward hydrocarboxylated imidazolopyridines. The merit of this strategy is illustrated by excellent functional group tolerance and the use of cheap and readily available starting materials.
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Affiliation(s)
- Hua Yao
- College of Chemistry, Nanchang University, No. 999, Xuefu Rd., Nanchang, 330031, P. R. China.
| | - Xiaoyang Zhong
- College of Chemistry, Nanchang University, No. 999, Xuefu Rd., Nanchang, 330031, P. R. China.
| | - Bingqing Wang
- College of Chemistry, Nanchang University, No. 999, Xuefu Rd., Nanchang, 330031, P. R. China.
| | - Sen Lin
- College of Chemistry, Nanchang University, No. 999, Xuefu Rd., Nanchang, 330031, P. R. China.
| | - Lichi Liu
- College of Chemistry, Nanchang University, No. 999, Xuefu Rd., Nanchang, 330031, P. R. China.
| | - Zhaohua Yan
- College of Chemistry, Nanchang University, No. 999, Xuefu Rd., Nanchang, 330031, P. R. China.
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10
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Peng K, Dong Z. Recent Advances in Cross‐Dehydrogenative Couplings (CDC) of C−H Bond in Aqueous Media. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001358] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Kang Peng
- School of Chemistry and Environmental Engineering Wuhan Institute of Technology Wuhan 430205 People's Republic of China
| | - Zhi‐Bing Dong
- School of Chemistry and Environmental Engineering Wuhan Institute of Technology Wuhan 430205 People's Republic of China
- School of Chemistry and Chemical Engineering Henan Normal University Xinxiang 453007 People's Republic of China
- Key Laboratory of Green Chemical Process Ministry of Education Wuhan Institute of Technology Wuhan 430205 People's Republic of China
- Hubei key Laboratory of Novel Reactor and Green Chemistry Technology Wuhan Institute of Technology Wuhan 430205 People's Repubic of China
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11
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Kerru N, Gummidi L, Maddila S, Jonnalagadda SB. A Review of Recent Advances in the Green Synthesis of Azole- and Pyran-based Fused Heterocycles Using MCRs and Sustainable Catalysts. CURR ORG CHEM 2021. [DOI: 10.2174/1385272824999201020204620] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Nitrogen, oxygen and sulfur-containing fused heterocycles are of great importance
because of their exciting and diverse biological activities. The construction of the carbonnitrogen
and carbon-oxygen through a multicomponent reaction approach by using ecofriendly
reusable heterogeneous catalysts are of significant importance as it opens avenues for
the introduction of nitrogen and oxygen in organic molecules. Thus, green methodologies
have gained particular significance in this field; today, green chemistry is considered a tool
for introducing sustainable concepts at the fundamental level. This review emphasizes and
discusses the current progress on the applications of eco-friendly, recyclable heterogeneous
catalysts for the synthesis of different heterocyclic fused systems and their green protocols.
We paid particular attention to the specific integration of carbon-nitrogen, and carbon-oxygen
bond-forming fused heterocycles by a one-pot approach by evaluating the literature between 2012 and the middle of
2020. The efficiency of the catalyst is assessed in terms of reaction time, yield and possible reusability. The MCR and
heterogeneous catalyst strategies have demonstrated broader scope, economical and viability for the green and sustainable
processes in the field of synthetic organic chemistry.
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Affiliation(s)
- Nagaraju Kerru
- School of Chemistry & Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban-4000, South Africa
| | - Lalitha Gummidi
- School of Chemistry & Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban-4000,, South Africa
| | - Suresh Maddila
- School of Chemistry & Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban-4000,, South Africa
| | - Sreekantha B. Jonnalagadda
- School of Chemistry & Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban-4000,, South Africa
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12
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Kumar R, Rawat D, Semwal R, Badhani G, Adimurthy S. Hypervalent iodine mediated synthesis of imidazo[1,2- a]pyridine ethers: consecutive methylene linkage and insertion of ethylene glycol. NEW J CHEM 2021. [DOI: 10.1039/d1nj00657f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Hypervalent iodine mediated selective synthesis of imidazo[1,2-a]pyridine ethers using ethylene glycol as a methoxy ethanol source as well as solvent under metal-free conditions is described.
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Affiliation(s)
- Rahul Kumar
- Academy of Scientific & Innovative Research Ghaziabad
- CSIR–Central Salt & Marine Chemicals Research Institute
- G. B. Marg
- Bhavnagar-364002
- India
| | - Deepa Rawat
- Academy of Scientific & Innovative Research Ghaziabad
- CSIR–Central Salt & Marine Chemicals Research Institute
- G. B. Marg
- Bhavnagar-364002
- India
| | - Rashmi Semwal
- Academy of Scientific & Innovative Research Ghaziabad
- CSIR–Central Salt & Marine Chemicals Research Institute
- G. B. Marg
- Bhavnagar-364002
- India
| | - Gaurav Badhani
- Academy of Scientific & Innovative Research Ghaziabad
- CSIR–Central Salt & Marine Chemicals Research Institute
- G. B. Marg
- Bhavnagar-364002
- India
| | - Subbarayappa Adimurthy
- Academy of Scientific & Innovative Research Ghaziabad
- CSIR–Central Salt & Marine Chemicals Research Institute
- G. B. Marg
- Bhavnagar-364002
- India
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Patel OPS, Nandwana NK, Legoabe LJ, Das BC, Kumar A. Recent Advances in Radical C−H Bond Functionalization of Imidazoheterocycles. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000633] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Om P. S. Patel
- Department of Chemistry Birla Institute of Technology and Science Pilani Pilani Campus 333031 Rajasthan India
- Centre of Excellence for Pharmaceutical Sciences North-West University Private Bag X6001 Potchefstroom 2520 South Africa
| | - Nitesh K. Nandwana
- Department of Chemistry Birla Institute of Technology and Science Pilani Pilani Campus 333031 Rajasthan India
- Departments of Medicine and Pharmacological Sciences Icahn School of Medicine at Mount Sinai New York, NY 10029 USA
| | - Lesetja J. Legoabe
- Centre of Excellence for Pharmaceutical Sciences North-West University Private Bag X6001 Potchefstroom 2520 South Africa
| | - Bhaskar C. Das
- Departments of Medicine and Pharmacological Sciences Icahn School of Medicine at Mount Sinai New York, NY 10029 USA
| | - Anil Kumar
- Department of Chemistry Birla Institute of Technology and Science Pilani Pilani Campus 333031 Rajasthan India
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Patel OPS, Jaspal S, Shinde VN, Nandwana NK, Rangan K, Kumar A. Phenyliodine(III) Diacetate-Mediated 1,2-ipso-Migration in Mannich Bases of Imidazo[1,2-a]pyridines: Preparation of N-Acetoxymethyl/Alkoxymethyl-N-arylimidazo[1,2-a]pyridine-3-amines. J Org Chem 2020; 85:7309-7321. [DOI: 10.1021/acs.joc.0c00674] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Om P. S. Patel
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
| | - Sonam Jaspal
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
| | - Vikki N. Shinde
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
| | - Nitesh K. Nandwana
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
| | - Krishnan Rangan
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Hyderabad Campus, Hyderabad, Telangana 500078, India
| | - Anil Kumar
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
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