1
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Song Q, Zhang Q, Fan X, Kayaat F, Lv R, Li J, Wang Y. The discovery of novel imidazo[1,2- a]pyridine derivatives as covalent anticancer agents. Org Biomol Chem 2024; 22:5374-5384. [PMID: 38869445 DOI: 10.1039/d4ob00694a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2024]
Abstract
The success of targeted covalent inhibitors (TCIs) for treating cancers has spurred the search for novel scaffolds to install covalent warheads. In our endeavour, using a scaffold hopping strategy, we managed to utilize imidazo[1,2-a]pyridine as the core backbone and explored its potential for the development of covalent inhibitors, therefore, synthesizing a series of novel KRAS G12C inhibitors facilitated by the Groebke-Blackburn-Bienaymè reaction (GBB reaction). Preliminary bio-evaluation screening delivered compound I-11 as a potent anticancer agent for KRAS G12C-mutated NCI-H358 cells, whose effects were further clarified by a series of cellular, biochemical, and molecular docking experiments. These results not only indicate the potential of compound I-11 as a lead compound for the treatment of intractable cancers, but also validate the unique role of imidazo[1,2-a]pyridine as a novel scaffold suitable for the discovery of covalent anticancer agents.
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Affiliation(s)
- Qin Song
- Key Laboratory of Marine Drugs, Chinese Ministry of Education; School of Medicine and Pharmacy, Ocean University of China, Qingdao 26003, Shandong, P. R. China.
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology, Qingdao 266200, P. R. China
| | - Qianer Zhang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education; School of Medicine and Pharmacy, Ocean University of China, Qingdao 26003, Shandong, P. R. China.
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology, Qingdao 266200, P. R. China
| | - Xuejing Fan
- Key Laboratory of Marine Drugs, Chinese Ministry of Education; School of Medicine and Pharmacy, Ocean University of China, Qingdao 26003, Shandong, P. R. China.
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology, Qingdao 266200, P. R. China
| | - Fatmata Kayaat
- Key Laboratory of Marine Drugs, Chinese Ministry of Education; School of Medicine and Pharmacy, Ocean University of China, Qingdao 26003, Shandong, P. R. China.
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology, Qingdao 266200, P. R. China
| | - Ruicheng Lv
- Key Laboratory of Marine Drugs, Chinese Ministry of Education; School of Medicine and Pharmacy, Ocean University of China, Qingdao 26003, Shandong, P. R. China.
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology, Qingdao 266200, P. R. China
| | - Jing Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education; School of Medicine and Pharmacy, Ocean University of China, Qingdao 26003, Shandong, P. R. China.
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology, Qingdao 266200, P. R. China
| | - Yong Wang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education; School of Medicine and Pharmacy, Ocean University of China, Qingdao 26003, Shandong, P. R. China.
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology, Qingdao 266200, P. R. China
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2
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Martinho LA, Andrade CKZ. HPW-Catalyzed environmentally benign approach to imidazo[1,2- a]pyridines. Beilstein J Org Chem 2024; 20:628-637. [PMID: 38533469 PMCID: PMC10964034 DOI: 10.3762/bjoc.20.55] [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: 12/07/2023] [Accepted: 03/05/2024] [Indexed: 03/28/2024] Open
Abstract
The imidazo[1,2-a]pyridine moiety is present in drugs with several biological activities. The most direct way of obtaining this nucleus is the Groebke-Blackburn-Bienaymé three-component reaction (GBB-3CR) between aminopyridines, aldehydes, and isocyanides under both Lewis and Brønsted acid catalysis. However, several catalysts for this reaction have major drawbacks such as being expensive, extremely dangerous, strong oxidizing, and even explosive. In this scenario, heteropolyacids emerge as greener and safer alternatives due to their very strong Brønsted acidity. In particular, phosphotungstic acid (HPW) is an economical and green attractive catalyst for being cheap, non-toxic, and is known for its chemical and thermal stability. Herein, we report a straightforward approach to the GBB-3CR using HPW as catalyst in ethanol under microwave (μw) heating. This convenient environmentally benign methodology is broad in scope, provides the heterobicyclic products in high yields (up to 99%), with a low catalyst loading (2 mol %) in only 30 minutes, and allows the successful use of aliphatic aldehydes, substrates not so frequently explored with most usual catalysts for this reaction. Furthermore, the aforementioned advantages make this methodology very attractive and superior to the existing ones.
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Affiliation(s)
- Luan A Martinho
- Instituto de Química, Laboratório de Química Metodológica e Orgânica Sintética (LaQMOS), Universidade de Brasília, 70904-970, Brasília, DF, Brazil
| | - Carlos Kleber Z Andrade
- Instituto de Química, Laboratório de Química Metodológica e Orgânica Sintética (LaQMOS), Universidade de Brasília, 70904-970, Brasília, DF, Brazil
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3
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Anjos NS, Chapina AI, Santos AR, Licence P, Longo LS. Groebke‐Blackburn‐Bienaymé Multicomponent Reaction Catalysed by Reusable Brϕnsted‐Acidic Ionic Liquids. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Nicolas S. Anjos
- Department of Pharmaceutical Sciences Federal University of São Paulo – UNIFESP Rua São Nicolau 210 09913-030 Diadema SP Brazil
| | - Agáta I. Chapina
- Department of Pharmaceutical Sciences Federal University of São Paulo – UNIFESP Rua São Nicolau 210 09913-030 Diadema SP Brazil
| | - Ana R. Santos
- GSK Carbon Neutral Laboratory The University of Nottingham – Jubilee Campus Nottingham NG7 2GA United Kingdom
| | - Peter Licence
- GSK Carbon Neutral Laboratory The University of Nottingham – Jubilee Campus Nottingham NG7 2GA United Kingdom
| | - Luiz S. Longo
- Department of Pharmaceutical Sciences Federal University of São Paulo – UNIFESP Rua São Nicolau 210 09913-030 Diadema SP Brazil
- GSK Carbon Neutral Laboratory The University of Nottingham – Jubilee Campus Nottingham NG7 2GA United Kingdom
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4
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Heterogeneous catalyst SiO 2-LaCl 3·7H 2O: characterization and microwave-assisted green synthesis of α-aminophosphonates and their antimicrobial activity. Mol Divers 2022; 26:2703-2715. [PMID: 35034246 DOI: 10.1007/s11030-021-10360-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 11/28/2021] [Indexed: 10/19/2022]
Abstract
Silica-supported lanthanum (III) chloride (SiO2-LaCl3·7H2O) was prepared and characterized by infrared spectroscopy, X-ray diffraction analysis, scanning electron microscope, energy-dispersive X-ray spectroscopy, thermogravimetric analysis and differential thermal analysis techniques. The catalytic activity of this silica-supported lanthanum (III) chloride was investigated in a one-pot three-component Kabachnik-Fields reaction. A library of new α-aminophosphonates was prepared employing various benzothiazole and thiadiazole amines, different substituted aldehydes and diethylphosphite under solvent-free conditions using conventional/microwave methods with good to excellent yields (85-97%). The advantages of this catalyst are that it is environmentally benign, economically inexpensive, and easy to prepare, gives high yields and high purity is less time-consuming, offers easy purification is reusable and enables products to be obtained by simple recrystallization without column chromatography.
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5
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Banerjee B, Priya A, Sharma A, Kaur G, Kaur M. Sulfonated β-cyclodextrins: efficient supramolecular organocatalysts for diverse organic transformations. PHYSICAL SCIENCES REVIEWS 2021. [DOI: 10.1515/psr-2021-0080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Abstract
The present review summarizes various organic transformations carried out by using sulfonated β-cyclodextrins such as β-cyclodextrin sulfonic acid, β-cyclodextrin propyl sulfonic acid, and β-cyclodextrin butyl sulfonic acid as an efficient, supramolecular reusable catalyst under diverse reaction conditions.
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Affiliation(s)
- Bubun Banerjee
- Department of Chemistry , Akal University , Talwandi Sabo , Bathinda , Punjab - 151302 , India
| | - Anu Priya
- Department of Chemistry , Akal University , Talwandi Sabo , Bathinda , Punjab - 151302 , India
| | - Aditi Sharma
- Department of Chemistry , Akal University , Talwandi Sabo , Bathinda , Punjab - 151302 , India
| | - Gurpreet Kaur
- Department of Chemistry , Akal University , Talwandi Sabo , Bathinda , Punjab - 151302 , India
| | - Manmeet Kaur
- Department of Chemistry , Akal University , Talwandi Sabo , Bathinda , Punjab - 151302 , India
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6
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Longo LS, Siqueira FA, Anjos NS, Santos GFD. Scandium(III)‐Triflate‐Catalyzed Multicomponent Reactions for the Synthesis of Nitrogen Heterocycles. ChemistrySelect 2021. [DOI: 10.1002/slct.202101032] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Luiz S. Longo
- Department of Pharmaceutical Sciences Federal University of São Paulo - UNIFESP Rua São Nicolau 210 09913-030 Diadema SP Brazil
| | - Fernanda A. Siqueira
- Department of Chemistry Federal University of São Paulo - UNIFESP Rua Prof. Arthur Riedel 275 09972-270 Diadema SP Brazil
| | - Nicolas S. Anjos
- Department of Pharmaceutical Sciences Federal University of São Paulo - UNIFESP Rua São Nicolau 210 09913-030 Diadema SP Brazil
| | - Gabriela F. D. Santos
- Department of Pharmaceutical Sciences Federal University of São Paulo - UNIFESP Rua São Nicolau 210 09913-030 Diadema SP Brazil
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7
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Magnetic spent coffee ground as an efficient and green catalyst for aerobic oxidation of alcohols and tandem oxidative Groebke–Blackburn–Bienaymé reaction. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2021. [DOI: 10.1007/s13738-020-02102-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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8
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Roslan II, Ng K, Alhooshani KR, Jaenicke S, Chuah G. In/Cu Catalyzed Multiple C−N/C−C Bond Formation via Multiple Bond Cleavage in a Three Component Synthesis of Arylimidazopyridine Carboxylates. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202000637] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Irwan Iskandar Roslan
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Kian‐Hong Ng
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Khalid R. Alhooshani
- Chemistry Department King Fahd University of Petroleum and Minerals Dhahran 31261 Saudi Arabia
| | - Stephan Jaenicke
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Gaik‐Khuan Chuah
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
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9
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Banerjee B, Kaur G, Kaur N. p-Sulfonic Acid Calix[n]arene Catalyzed Synthesis of Bioactive Heterocycles: A Review. CURR ORG CHEM 2021. [DOI: 10.2174/1385272824999201019162655] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Metal-free organocatalysts are becoming an important tool for the sustainable development
of various bioactive heterocycles. On the other hand, during the last two decades,
calix[n]arenes have been gaining considerable attention due to their wide range of applicability
in the field of supramolecular chemistry. Recently, sulfonic acid functionalized calix[n]
arenes are being employed as an efficient alternative catalyst for the synthesis of various bioactive
scaffolds. In this review, we have summarized the catalytic efficiency of p-sulfonic
acid calix[n]arenes for the synthesis of diverse, biologically promising scaffolds under various
reaction conditions. There is no such review available in the literature showing the catalytic
applicability of p-sulfonic acid calix[n]arenes. Therefore, it is strongly believed that this
review will surely attract those researchers who are interested in this fascinating organocatalyst.
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Affiliation(s)
- Bubun Banerjee
- Department of Chemistry, Indus International University, V.P.O. Bathu, Distt. Una, Himachal Pradesh-174301, India
| | - Gurpreet Kaur
- Department of Chemistry, Indus International University, V.P.O. Bathu, Distt. Una, Himachal Pradesh-174301, India
| | - Navdeep Kaur
- Department of Chemistry, Indus International University, V.P.O. Bathu, Distt. Una, Himachal Pradesh-174301, India
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10
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Mathavan S, B. R. D. Yamajala R. Sustainable Synthetic Approaches for 3‐Aminoimidazo‐fused Heterocycles viaGroebke‐Blackburn‐Bienaymé Process. ChemistrySelect 2020. [DOI: 10.1002/slct.202002894] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Sivagami Mathavan
- Department of chemistry, School of Chemical & Biotechnology SASTRA Deemed University Thanjavur 613401 India
| | - Rajesh B. R. D. Yamajala
- Department of chemistry, School of Chemical & Biotechnology SASTRA Deemed University Thanjavur 613401 India
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11
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Hussain M, Liu J, Fu L, Hasan M. Synthesis of imidazo[1, 2‐a]pyridines via the silver acetate‐catalyzed Groebke‐Blackburn‐Bienayme reaction with ethylene glycol as a biodegradable and sustainable solvent. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.3746] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Mustafa Hussain
- State key laboratory of fine chemicalDalian University of Technology Dalian People's Republic of China
| | - Jianhui Liu
- State key laboratory of fine chemicalDalian University of Technology Dalian People's Republic of China
- School of Petroleum and Chemical EngineeringDalian University of Technology, Panjin Campus Panjin Liaoning Province People's Republic of China
| | - Lu Fu
- School of Petroleum and Chemical EngineeringDalian University of Technology, Panjin Campus Panjin Liaoning Province People's Republic of China
| | - Mehdi Hasan
- Department of ChemistryUniversity of Baltistan Skardu Pakistan
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12
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Boltjes A, Dömling A. The Groebke-Blackburn-Bienaymé Reaction. EUROPEAN JOURNAL OF CHEMISTRY (PRINT) 2019; 2019:7007-7049. [PMID: 34012704 PMCID: PMC8130801 DOI: 10.1002/ejoc.201901124] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Indexed: 12/23/2022]
Abstract
Imidazo[1,2-a]pyridine is a well-known scaffold in many marketed drugs, such as Zolpidem, Minodronic acid, Miroprofen and DS-1 and it also serves as a broadly applied pharmacophore in drug discovery. The scaffold revoked a wave of interest when Groebke, Blackburn and Bienaymé reported independently a new three component reaction resulting in compounds with the imidazo[1,2-a]-heterocycles as a core structure. During the course of two decades the Groebke Blackburn Bienaymé (GBB-3CR) reaction has emerged as a very important multicomponent reaction (MCR), resulting in over a hundred patents and a great number of publications in various fields of interest. Now two compounds derived from GBB-3CR chemistry received FDA approval. To celebrate the first 20 years of GBB-chemistry, we present an overview of the chemistry of the GBB-3CR, including an analysis of each of the three starting material classes, solvents and catalysts. Additionally, a list of patents and their applications and a more in-depth summary of the biological targets that were addressed, including structural biology analysis, is given.
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Affiliation(s)
- André Boltjes
- Department of Drug Design, Groningen Research Institute of Pharmacy, University of Groningen, A. Deusinglaan 1, Groningen, The Netherlands
| | - Alexander Dömling
- Department of Drug Design, Groningen Research Institute of Pharmacy, University of Groningen, A. Deusinglaan 1, Groningen, The Netherlands
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13
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Reen GK, Kumar A, Sharma P. Recent advances on the transition-metal-catalyzed synthesis of imidazopyridines: an updated coverage. Beilstein J Org Chem 2019; 15:1612-1704. [PMID: 31435443 PMCID: PMC6664406 DOI: 10.3762/bjoc.15.165] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 06/28/2019] [Indexed: 12/21/2022] Open
Abstract
A comprehensive account of recent advances in the synthesis of imidazopyridines, assisted through transition-metal-catalyzed multicomponent reactions, C-H activation/functionalization and coupling reactions are highlighted in this review article. The basic illustration of this review comprises of schemes with concise account of explanatory text. The schemes depict the reaction conditions along with a quick look into the mechanism involved to render a deep understanding of the catalytic role. At some instances optimizations of certain features have been illustrated through tables, i.e., selectivity of catalyst, loading of the catalyst and percentage yield with different substrates. Each of the reported examples has been rigorously analyzed for reacting substrates, reaction conditions and transition metals used as the catalyst. This review will be helpful to the chemists in understanding the challenges associated with the reported methods as well as the future possibilities, both in the choice of substrates and catalysts. This review would be quite appealing to a wider range of organic chemists in academia and industrial R&D sectors working in the field of heterocyclic syntheses. In a nutshell, this review will be a guiding torch to envisage: (i) the role of various transition metals in the domain dedicated towards method development and (ii) for the modifications needed thereof in the R&D sector.
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Affiliation(s)
| | - Ashok Kumar
- School of Chemical Sciences, Devi Ahilya University, Indore, (M. P.), India
| | - Pratibha Sharma
- School of Chemical Sciences, Devi Ahilya University, Indore, (M. P.), India
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14
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Wu J, Luo H, Wang T, Sun H, Zhang Q, Chai Y. Diverse synthesis of pyrimido[1,2-a]benzimidazoles and imidazo[2,1-b]benzothiazoles via CuI-catalyzed decarboxylic multicomponent reactions of heterocyclic azoles, aldehydes and alkynecarboxylic acids. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.01.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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15
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16
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Efficient access to novel tetra- and pentacyclic dihydroquinolin-2-ones by catalyst-free domino Knöevenagel hetero-Diels–Alder reactions from N-(2-formylphenyl)-N-methylcinnamamides and cyclic 1,3-dicarbonyls in water. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2017. [DOI: 10.1007/s13738-016-0968-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Shinde AH, Arepally S, Baravkar MD, Sharada DS. Nickel-Catalyzed Aerobic Oxidative Isocyanide Insertion: Access to Benzimidazoquinazoline Derivatives via a Sequential Double Annulation Cascade (SDAC) Strategy. J Org Chem 2016; 82:331-342. [DOI: 10.1021/acs.joc.6b02423] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Anand H. Shinde
- Department of Chemistry, Indian Institute of Technology Hyderabad (IITH), Kandi, Sangareddy 502
285, Telangana, India
| | - Sagar Arepally
- Department of Chemistry, Indian Institute of Technology Hyderabad (IITH), Kandi, Sangareddy 502
285, Telangana, India
| | - Mayur D. Baravkar
- Department of Chemistry, Indian Institute of Technology Hyderabad (IITH), Kandi, Sangareddy 502
285, Telangana, India
| | - Duddu S. Sharada
- Department of Chemistry, Indian Institute of Technology Hyderabad (IITH), Kandi, Sangareddy 502
285, Telangana, India
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18
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Chen JF, Liu ZQ. Synthesis of imidazo[1,2-a]quinoxalines by double Groebke reactions and inhibitory effects on radicals and DNA oxidation. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.02.042] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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19
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Sagar A, Nagarjuna Babu V, Shinde AH, Sharada DS. A metal-free cyclic iminium induced one-pot double annulation cascade: access to dihydroisoquinolinium (DHIQ) salts. Org Biomol Chem 2016; 14:10366-10370. [DOI: 10.1039/c6ob02089e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A reactive cyclic iminium induced one-pot Groebke–Blackburn–Bienayme (GBB) double annulation cascade (DAC) for the synthesis of skeletally diverse DHIQ salts has been described. The key features of this protocol are solvent-free, robust method, clean reaction profile and operational simplicity.
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Affiliation(s)
- A. Sagar
- Department of Chemistry
- Indian Institute of Technology Hyderabad
- Sangareddy
- India
| | | | - Anand H. Shinde
- Department of Chemistry
- Indian Institute of Technology Hyderabad
- Sangareddy
- India
| | - Duddu S. Sharada
- Department of Chemistry
- Indian Institute of Technology Hyderabad
- Sangareddy
- India
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20
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Shaabani A, Hooshmand SE. Choline chloride/urea as a deep eutectic solvent/organocatalyst promoted three-component synthesis of 3-aminoimidazo-fused heterocycles via Groebke–Blackburn–Bienayme process. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2015.12.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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21
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Introducing ferrocene into imidazo[1,2- a ]pyridine by Groebke three-component-reaction for scavenging radicals and inhibiting DNA oxidation. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.10.080] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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22
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Bakthadoss M, Sivakumar N, Devaraj A. Synthesis of benzoxepinopyrrolidines/spiropyrrolidines via oxa-Pictet–Spengler and [3+2] cycloaddition reactions. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.07.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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23
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Dianat S, Mahdavi M, Moghimi S, Mouradzadegun A, Shafiee A, Foroumadi A. Combined isocyanide-based multi-component Ullmann-type reaction: an efficient access to novel nitrogen-containing pentacyclic compounds. Mol Divers 2015; 19:797-805. [DOI: 10.1007/s11030-015-9622-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Accepted: 07/19/2015] [Indexed: 12/29/2022]
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24
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Diastereoselective construction of highly functionalized tetrahydroquinolinoisoxazole scaffolds via intramolecular nitrone cycloaddition. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.05.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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25
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Sagar A, Babu VN, Dey A, Sharada DS. I2-promoted denitration strategy: one-pot three component synthesis of pyrrole-fused benzoxazines. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.04.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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26
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Bakthadoss M, Kannan D, Sivakumar N, Malathi P, Manikandan V. Stereoselective construction of functionalized tetracyclic and pentacyclic coumarinopyranpyrazole/pyrimidinedione/coumarin scaffolds using a solid-state melt reaction. Org Biomol Chem 2015; 13:5597-601. [PMID: 25913710 DOI: 10.1039/c5ob00442j] [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]
Abstract
An assembly of tetra / pentacyclic hybrid scaffolds have been synthesized for the first time using a solid-state melt reaction in a stereoselective fashion with excellent yields.
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Affiliation(s)
- Manickam Bakthadoss
- Department of Chemistry
- Pondicherry University
- Pondicherry 605 014
- India
- Department of Organic Chemistry
| | - Damodharan Kannan
- Department of Organic Chemistry
- University of Madras
- Chennai 600025
- India
| | | | - Palani Malathi
- Department of Organic Chemistry
- University of Madras
- Chennai 600025
- India
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Bakthadoss M, Vinayagam V. A novel protocol for the facile construction of tetrahydroquinoline fused tricyclic frameworks via an intramolecular 1,3-dipolar nitrile oxide cycloaddition reaction. Org Biomol Chem 2015; 13:10007-14. [DOI: 10.1039/c5ob01060h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient method towards the synthesis of quinoline fused tricyclic compounds involving an intramolecular 1,3-dipolar nitrile oxide cycloaddition reaction utilizing Baylis–Hillman derivatives in good yields has been described for the first time.
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Affiliation(s)
- Manickam Bakthadoss
- Department of Chemistry
- Pondicherry University
- Pondicherry-605 014
- India
- Department of Organic Chemistry
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28
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Vidyacharan S, Sagar A, Sharada DS. A new route for the synthesis of highly substituted 4-aminoquinoline drug like molecules via aza hetero–Diels–Alder reaction. Org Biomol Chem 2015; 13:7614-8. [DOI: 10.1039/c5ob01023c] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A new route has been developed for the synthesis of 4-aminoquinoline drug like moleculesviaaza hetero–Diels–Alder reaction starting from 2H-indazole as a diene for the first time.
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Affiliation(s)
- Shinde Vidyacharan
- Department of Chemistry
- Indian Institute of Technology Hyderabad
- Telangana
- Hyderabad
- India
| | - A. Sagar
- Department of Chemistry
- Indian Institute of Technology Hyderabad
- Telangana
- Hyderabad
- India
| | - Duddu S. Sharada
- Department of Chemistry
- Indian Institute of Technology Hyderabad
- Telangana
- Hyderabad
- India
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29
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Shinde AH, Archith N, Malipatel S, Sharada DS. A facile one-pot protocol for the synthesis of tetrazolyl-tetrahydroisoquinolines via novel domino intramolecular cyclization/Ugi-azide sequence. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.10.076] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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