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Hote BS, Siddiqui TAJ, Pisal PM. Green Approach for Four Component One Pot Synthesis of Polyhydroquinoline Catalyzed by Praseodymium Oxide Using Visible Light. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2021.1953544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Baliram S. Hote
- Department of Chemistry, Maharashtra Udayagiri Mahavidyalaya Udgir, Udgir, Maharashtra, India
| | - Tabassum A. J. Siddiqui
- School of Chemical Sciences, Swami Ramanand Teerth Marathwada University Nanded, Nanded, Maharashtra, India
| | - Parshuram M. Pisal
- School of Chemical Sciences, Swami Ramanand Teerth Marathwada University Nanded, Nanded, Maharashtra, India
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Sonali Anantha IS, Kerru N, Maddila S, Jonnalagadda SB. Recent Progresses in the Multicomponent Synthesis of Dihydropyridines by Applying Sustainable Catalysts Under Green Conditions. Front Chem 2021; 9:800236. [PMID: 34993177 PMCID: PMC8724676 DOI: 10.3389/fchem.2021.800236] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 11/19/2021] [Indexed: 11/27/2022] Open
Abstract
The synthesis of dihydropyridines, valuable molecules with diverse therapeutic properties, using eco-friendly heterogeneous catalysts as a green alternative received significant consideration. By selecting appropriate precursors, these compounds can be readily modified to induce the desired properties in the target product. This review focused on synthesising diverse dihydropyridine derivatives in single-pot reactions using magnetic, silica, and zirconium-based heterogeneous catalytic systems. The monograph describes preparation techniques for various catalyst materials in detail. It covers facile and benign magnetic, silica, zirconium-based, and ionic liquid catalysts, exhibiting significant efficacy and consistently facilitating excellent yields in short reaction times and in a cost-effective way. Most of the designated protocols employ Hantzsch reactions involving substituted aldehydes, active methylene compounds, and ammonium acetate. These reactions presumably follow Knoevenagel condensation followed by Michael addition and intra-molecular cyclisation. The multicomponent one-pot protocols using green catalysts and solvents have admirably increased the product selectivity and yields while minimising the reaction time. These sustainable catalyst materials retain their viability for several cycles reducing the expenditure are eco-friendly.
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Affiliation(s)
| | - Nagaraju Kerru
- Department of Chemistry, GITAM School of Science, GITAM University, Bengaluru, India
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban, South Africa
| | - Suresh Maddila
- Department of Chemistry, GITAM Institute of Sciences, GITAM University, Visakhapatnam, India
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban, South Africa
| | - Sreekantha B. Jonnalagadda
- School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban, South Africa
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3
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Alponti LH, Picinini M, Urquieta-Gonzalez EA, Corrêa AG. USY-zeolite catalyzed synthesis of 1,4-dihydropyridines under microwave irradiation: structure and recycling of the catalyst. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129430] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Abstract
Cross-coupling reactions furnishing carbon–carbon (C–C) and carbon–heteroatom (C–X) bond is one of the most challenging tasks in organic syntheses. The early developed reaction protocols by Ullmann, Ullman–Goldberg, Cadiot–Chodkiewicz, Castro–Stephens, and Corey–House, utilizing elemental copper or its salts as catalyst have, for decades, attracted and inspired scientists. However, these reactions were suffering from the range of functional groups tolerated as well as severely restricted by the harsh reaction conditions often required high temperatures (150–200 °C) for extended reaction time. Enormous efforts have been paid to develop and achieve more sustainable reaction conditions by applying the microwave irradiation. The use of controlled microwave heating dramatically reduces the time required and therefore resulting in increase in the yield as well as the efficiency of the reaction. This review is mainly focuses on the recent advances and applications of copper catalyzed cross-coupling generation of carbon–carbon and carbon–heteroatom bond under microwave technology.
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Ahadi N, Mobinikhaledi A, Bodaghifard MA. One‐pot synthesis of 1,4‐dihydropyridines and
N
‐arylquinolines in the presence of copper complex stabilized on MnFe
2
O
4
(MFO) as a novel organic–inorganic hybrid material and magnetically retrievable catalyst. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5822] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Najmieh Ahadi
- Department of Chemistry, Faculty of Science Arak University Arak 38156‐88138 Iran
| | - Akbar Mobinikhaledi
- Department of Chemistry, Faculty of Science Arak University Arak 38156‐88138 Iran
- Institute of Nanosciences and Nanotechnology Arak University Arak Iran
| | - Mohammad Ali Bodaghifard
- Department of Chemistry, Faculty of Science Arak University Arak 38156‐88138 Iran
- Institute of Nanosciences and Nanotechnology Arak University Arak Iran
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Tiwari SK, Shivhare KN, Patel MK, Yadav V, Nazeef M, Siddiqui IR. A Metal Free, Hantzsch Synthesis for Privileged Scaffold 1, 4-Dihydropyridines: A Glycerol Promoted Sustainable Protocol. Polycycl Aromat Compd 2020. [DOI: 10.1080/10406638.2020.1764988] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Saurabh K. Tiwari
- Laboratory of Green Synthesis, Department of Chemistry, University of Allahabad, Allahabad, India
| | - Km Neha Shivhare
- Laboratory of Green Synthesis, Department of Chemistry, University of Allahabad, Allahabad, India
| | - Manoj K. Patel
- Electrochemical Laboratory of Organic Synthesis, Department of Chemistry, University of Allahabad, Allahabad, India
| | - Vikas Yadav
- Laboratory of Green Synthesis, Department of Chemistry, University of Allahabad, Allahabad, India
| | - Mohd Nazeef
- Laboratory of Green Synthesis, Department of Chemistry, University of Allahabad, Allahabad, India
| | - I. R. Siddiqui
- Laboratory of Green Synthesis, Department of Chemistry, University of Allahabad, Allahabad, India
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Bhaskaruni SV, Maddila S, van Zyl WE, Jonnalagadda SB. Four-Component Fusion Protocol with NiO/ZrO 2 as a Robust Recyclable Catalyst for Novel 1,4-Dihydropyridines. ACS OMEGA 2019; 4:21187-21196. [PMID: 31867512 PMCID: PMC6921676 DOI: 10.1021/acsomega.9b02608] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 10/17/2019] [Indexed: 06/10/2023]
Abstract
Nickel oxide loaded on zirconia (NiO/ZrO2) as an expedient catalyst is reported for the synthesis of 18 unsymmetrical 1,4-dihydropyridine derivatives. The Lewis acidic nature of the catalyst proved an excellent choice for the one-pot, four-component fusion reaction with excellent yields of 89-98% and a completion time of 20-45 min. Mechanistic studies show that enamine and imine functionalities are the two possible pathways for the formation of 1,4-dihydropyridines with high selectivity. Crystal structures of two novel compounds (5a, 5c) were reported. The catalyst demonstrated reusability up to six cycles. The reaction at room temperature and ethanol as a solvent make this protocol green and economical.
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8
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Khumalo MR, Maddila SN, Maddila S, Jonnalagadda SB. Microwave‐Assisted One‐Step Four‐Component Reaction for Synthesis of 1,4‐Dihydropyridines Catalyzed by Triethylamine. ChemistrySelect 2019. [DOI: 10.1002/slct.201903222] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Mandlenkosi Robert Khumalo
- School of Chemistry & PhysicsUniversity of KwaZulu-NatalWestville Campus Private Bag X54001 Durban 4000 South Africa
| | - Surya Narayana Maddila
- School of Chemistry & PhysicsUniversity of KwaZulu-NatalWestville Campus Private Bag X54001 Durban 4000 South Africa
| | - Suresh Maddila
- School of Chemistry & PhysicsUniversity of KwaZulu-NatalWestville Campus Private Bag X54001 Durban 4000 South Africa
| | - Sreekantha B. Jonnalagadda
- School of Chemistry & PhysicsUniversity of KwaZulu-NatalWestville Campus Private Bag X54001 Durban 4000 South Africa
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9
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Shearer C, Desaunay O, Zorc S, Richaud AD, Samanta SS, Jeedimalla N, Roche SP. Intercepted-Knoevenagel condensation for the synthesis of unsymmetrical fused-tricyclic 4 H-pyrans. Tetrahedron 2019; 75. [PMID: 31741543 DOI: 10.1016/j.tet.2019.130606] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
4H-Pyrans (4H-Pys) and 1,4-dihydropyridines (1,4-DHPs) are important classes of heterocyclic scaffolds in medicinal chemistry. Herein, an indium(III)-catalyzed one-pot domino reaction for the synthesis of highly functionalized 4H-Pys, and a model of 1,4-DHP is reported. This alternative approach to the challenging Hantzsch 4-component reaction enables the synthesis of fused-tricyclic heterocycles, and the mechanistic studies underline the importance of an intercepted-Knoevenagel adduct to achieve higher chemoselectivity towards these types of unsymmetrical heterocycles.
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Affiliation(s)
- Charles Shearer
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, FL 33431, United States
| | - Oriane Desaunay
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, FL 33431, United States
| | - Stephen Zorc
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, FL 33431, United States
| | - Alexis D Richaud
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, FL 33431, United States
| | - Shyam S Samanta
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, FL 33431, United States
| | - Nagalakshmi Jeedimalla
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, FL 33431, United States
| | - Stéphane P Roche
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, FL 33431, United States
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10
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Perumal M, Sengodu P, Venkatesan S, Perumal S, Antony S, Paramsivam M. Polybenzimidazole-Triphenylphosphene-Catalyzed One-Pot Synthesis and Evaluation of Dihydropyridine Derivative as Antibiotics and Antifungals. ChemistrySelect 2017. [DOI: 10.1002/slct.201700918] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Muthuraja Perumal
- Department of Chemistry; Alagappa University; Karaikudi-630006 India
| | - Prakash Sengodu
- Department of Chemistry; Alagappa University; Karaikudi-630006 India
| | | | | | - Susaimanickam Antony
- Department of Chemistry; Arumugam Pillai Seethai Ammal College; Thirupattur-630211 India
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11
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ClO4 −/Zr-MCM-41 nanoparticles prepared at mild conditions: a novel solid acid catalyst for the synthesis of polyhydroquinolines. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2016. [DOI: 10.1007/s13738-016-0848-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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12
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Palermo V, Sathicq ÁG, Constantieux T, Rodríguez J, Vázquez PG, Romanelli GP. First Report About the Use of Micellar Keggin Heteropolyacids as Catalysts in the Green Multicomponent Synthesis of Nifedipine Derivatives. Catal Letters 2016. [DOI: 10.1007/s10562-016-1784-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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An efficient solvent-free synthesis of isoxazolyl-1,4-dihydropyridines on solid support SiO2 under microwave irradiation. MONATSHEFTE FUR CHEMIE 2016. [DOI: 10.1007/s00706-016-1657-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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14
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Demirci T, Çelik B, Yıldız Y, Eriş S, Arslan M, Sen F, Kilbas B. One-pot synthesis of Hantzsch dihydropyridines using a highly efficient and stable PdRuNi@GO catalyst. RSC Adv 2016. [DOI: 10.1039/c6ra13142e] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The method for the synthesis of 1,4-dihydropyridine compounds in the presence of Pd–Ni–Ru@GO was developed, which is simple, effective and productive.
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Affiliation(s)
- Tuna Demirci
- Scientific and Technological Research Laboratory
- Duzce University
- Konuralp Campus
- Duzce
- Turkey
| | - Betül Çelik
- Sen Research Group
- Biochemistry Department
- Faculty of Arts and Science
- Dumlupınar University
- Evliya Çelebi Campus
| | - Yunus Yıldız
- Sen Research Group
- Biochemistry Department
- Faculty of Arts and Science
- Dumlupınar University
- Evliya Çelebi Campus
| | - Sinan Eriş
- Sen Research Group
- Biochemistry Department
- Faculty of Arts and Science
- Dumlupınar University
- Evliya Çelebi Campus
| | - Mustafa Arslan
- Chemistry Department
- Faculty of Arts and Sciences
- Sakarya University
- Esentepe Campus
- Serdivan
| | - Fatih Sen
- Sen Research Group
- Biochemistry Department
- Faculty of Arts and Science
- Dumlupınar University
- Evliya Çelebi Campus
| | - Benan Kilbas
- Department of Chemistry
- Faculty of Sciences
- Duzce University
- 81620 Duzce
- Turkey
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15
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Tabassum S, Govindaraju S, Khan RUR, Pasha MA. Ultrasound mediated, green innovation for the synthesis of polysubstituted 1,4-dihydropyridines. RSC Adv 2016. [DOI: 10.1039/c6ra05441b] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An atom efficient protocol via a one-pot four-component cyclocondensation reaction catalyzed by copper(i) iodide in aqueous medium under ultrasonic irradiation has been developed for the synthesis of novel polysubstituted 1,4-dihydropyridines.
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Affiliation(s)
- Sumaiya Tabassum
- Department of Studies in Chemistry
- Central College Campus
- Bangalore University
- Bangalore-560 001
- India
| | - Santhosh Govindaraju
- Department of Studies in Chemistry
- Central College Campus
- Bangalore University
- Bangalore-560 001
- India
| | - Riyaz-ur-Rahaman Khan
- Department of Studies in Chemistry
- Central College Campus
- Bangalore University
- Bangalore-560 001
- India
| | - M. A. Pasha
- Department of Studies in Chemistry
- Central College Campus
- Bangalore University
- Bangalore-560 001
- India
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Khazaei A, Moosavi-Zare AR, Afshar-Hezarkhani H, Khakyzadeh V. Nano-ferrous ferric oxide (nano-Fe3O4): magnetite catalytic system for the one-pot four-component tandem imine/enamine formation-Knoevenagel–Michael-cyclocondensation reaction of dimedone, aldehydes, β-ketoesters and ammonium acetate under green media. RSC Adv 2014. [DOI: 10.1039/c4ra03980g] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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17
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Novel Brønsted Acidic Ionic Liquid ([CMIM][CF3COO]) Prompted Multicomponent Hantzsch Reaction for the Eco-Friendly Synthesis of Acridinediones: An Efficient and Recyclable Catalyst. Catal Letters 2014. [DOI: 10.1007/s10562-014-1202-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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18
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Paplal B, Nagaraju S, Veerabhadraiah P, Sujatha K, Kanvah S, Vijaya Kumar B, Kashinath D. Recyclable Bi2WO6-nanoparticle mediated one-pot multicomponent reactions in aqueous medium at room temperature. RSC Adv 2014. [DOI: 10.1039/c4ra07708c] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Room temperature multicomponent reactions (MCRs) are reported using Bi2O3, BiVO4, and Bi2WO6 (nanoparticle) as heterogeneous catalysts. Among these, Bi2WO6 (5 mol%) nanoparticles showed excellent reactivity for the synthesis of functionalized dihydropyridine, polyhydroquinoline, 4H-chromene and 2-amino-4H-benzo[b]pyran derivatives in aqueous medium.
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Affiliation(s)
- Banoth Paplal
- Department of Chemistry
- National Institute of Technology
- Warangal-506 004, India
| | - S. Nagaraju
- Department of Chemistry
- National Institute of Technology
- Warangal-506 004, India
| | | | - Kodam Sujatha
- Department of Chemistry
- National Institute of Technology
- Warangal-506 004, India
| | - Sriram Kanvah
- Department of Chemistry
- Indian Institute of Technology
- Ahmedabad, India
| | - B. Vijaya Kumar
- Department of Chemistry
- Nizam College
- Osmania University
- Hyderabad, India
| | - Dhurke Kashinath
- Department of Chemistry
- National Institute of Technology
- Warangal-506 004, India
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Rajesh UC, Manohar S, Rawat DS. Hydromagnesite as an Efficient Recyclable Heterogeneous Solid Base Catalyst for the Synthesis of Flavanones, Flavonols and 1,4-Dihydropyridines in Water. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300555] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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20
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Khazaei A, Zolfigol MA, Moosavi-Zare AR, Afsar J, Zare A, Khakyzadeh V, Beyzavi MH. Synthesis of hexahydroquinolines using the new ionic liquid sulfonic acid functionalized pyridinium chloride as a catalyst. CHINESE JOURNAL OF CATALYSIS 2013. [DOI: 10.1016/s1872-2067(12)60678-0] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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21
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Synthesis, characterization and application of ionic liquid 1,3-disulfonic acid imidazolium hydrogen sulfate as an efficient catalyst for the preparation of hexahydroquinolines. J Mol Liq 2013. [DOI: 10.1016/j.molliq.2012.10.045] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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22
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Yang SH, Zhao FY, Lü HY, Deng J, Zhang ZH. An Efficient One-Pot Synthesis of 1,4-Dihydropyridines Catalyzed by Magnetic Nanocrystalline Fe3O4. J Heterocycl Chem 2012. [DOI: 10.1002/jhet.953] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Shu-Hong Yang
- Key Laboratory of Inorganic Nanomaterial of Hebei Province; The College of Chemistry and Material Science, Hebei Normal University; Shijiazhuang 050016; China
| | - Fei-Yang Zhao
- Key Laboratory of Inorganic Nanomaterial of Hebei Province; The College of Chemistry and Material Science, Hebei Normal University; Shijiazhuang 050016; China
| | - Hong-Yan Lü
- Key Laboratory of Inorganic Nanomaterial of Hebei Province; The College of Chemistry and Material Science, Hebei Normal University; Shijiazhuang 050016; China
| | - Jia Deng
- Key Laboratory of Inorganic Nanomaterial of Hebei Province; The College of Chemistry and Material Science, Hebei Normal University; Shijiazhuang 050016; China
| | - Zhan-Hui Zhang
- Key Laboratory of Inorganic Nanomaterial of Hebei Province; The College of Chemistry and Material Science, Hebei Normal University; Shijiazhuang 050016; China
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23
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1-Methylimidazolium trifluoroacetate [Hmim]Tfa: Mild and efficient Brønsted acidic ionic liquid for Hantzsch reaction under microwave irradiation. J CHEM SCI 2012. [DOI: 10.1007/s12039-012-0306-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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24
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Khalafi-Nezhad A, Panahi F, Mohammadi S, Foroughi HO. A green and efficient procedure for one-pot synthesis of xanthenes and acridines using silica boron–sulfuric acid nanoparticles (SBSANs) as a solid Lewis-protic acid. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2012. [DOI: 10.1007/s13738-012-0140-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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25
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Affeldt RF, Benvenutti EV, Russowsky D. A new In–SiO2 composite catalyst in the solvent-free multicomponent synthesis of Ca2+ channel blockers nifedipine and nemadipine B. NEW J CHEM 2012. [DOI: 10.1039/c2nj40060j] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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26
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Palladium(0) nanoparticles: an efficient catalyst for the one-pot synthesis of polyhydroquinolines. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.07.031] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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27
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Chen T, Xu XP, Liu HF, Ji SJ. A convergent construction of 1,4-dihydropyridine scaffold containing indole fragment. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.05.065] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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28
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Pasunooti KK, Chai H, Jensen CN, Gorityala BK, Wang S, Liu XW. A microwave-assisted, copper-catalyzed three-component synthesis of dihydropyrimidinones under mild conditions. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2010.10.150] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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29
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Zeng J, Bai Y, Cai S, Ma J, Liu XW. Direct synthesis of pyrroles via a silver-promoted three-component reaction involving unusual imidazole ring opening. Chem Commun (Camb) 2011; 47:12855-7. [DOI: 10.1039/c1cc14716a] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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