1
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Chen R, Singh P, Su S, Kocalar S, Wang X, Mandava N, Venkatesan S, Ferguson A, Rao A, Le E, Rojas C, Njoo E. Benchtop 19F Nuclear Magnetic Resonance (NMR) Spectroscopy Provides Mechanistic Insight into the Biginelli Condensation toward the Chemical Synthesis of Novel Trifluorinated Dihydro- and Tetrahydropyrimidinones as Antiproliferative Agents. ACS OMEGA 2023; 8:10545-10554. [PMID: 36969393 PMCID: PMC10034998 DOI: 10.1021/acsomega.3c00290] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Accepted: 02/23/2023] [Indexed: 06/18/2023]
Abstract
Benchtop nuclear magnetic resonance (NMR) spectroscopy has enabled the monitoring and optimization of chemical transformations while simultaneously providing kinetic, mechanistic, and structural insight into reaction pathways with quantitative precision. Moreover, benchtop NMR proton lock capabilities further allow for rapid and convenient monitoring of various organic reactions in real time, as the use of deuterated solvents is not required. The complementary role of 19F NMR-based kinetic monitoring in the fluorination of bioactive compounds has many benefits in the drug discovery process since fluorinated motifs additionally improve drug pharmacology. In this study, 19F NMR spectroscopy was utilized to monitor the synthesis of novel trifluorinated analogs of monastrol, a small molecule dihydropyrimidinone kinesin-Eg5 inhibitor, and to probe the mechanism of the Biginelli cyclocondensation, a multicomponent reaction used to synthesize dihydropyrimidinone and tetrahydropyrimidinones through a Bronsted- or Lewis-acid catalyzed cyclocondensation between ethyl acetoacetate, thiourea, and an aryl aldehyde. In the present study, a trifluorinated ketoester serves a dual purpose as being the source of the trifluoromethyl group in our fluorinated dihydropyrimidinones and as a spectroscopic handle for real-time reaction monitoring and tracking of reactive intermediates by 19F NMR. Further, upon extending this workflow to a diverse array of 3- and 4-substituted aryl aldehydes, we were able to derive Hammett linear free energy relationships (LFER) to determine stereoelectronic effects of para- and meta-substituted aryl aldehydes to corresponding reaction rates and mechanistic routes. In addition, we used density functional theory (DFT) calculations to corroborate our experimental results through the thermodynamic values of key intermediates in each mechanism. Finally, these studies culminate in the synthesis of a novel trifluorinated analog of monastrol and its subsequent biological evaluation in vitro. More broadly, we show an application of benchtop 19F NMR spectroscopy as an analytical tool in the real-time investigation of a mechanistically and chemically complex multicomponent reaction mixture.
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Affiliation(s)
- Rosie Chen
- Department of Chemistry,
Biochemistry and Physics, Aspiring Scholars
Directed Research Program, Fremont, California 94539, United States
| | - Pratyush Singh
- Department of Chemistry,
Biochemistry and Physics, Aspiring Scholars
Directed Research Program, Fremont, California 94539, United States
| | - Sarah Su
- Department of Chemistry,
Biochemistry and Physics, Aspiring Scholars
Directed Research Program, Fremont, California 94539, United States
| | - Selin Kocalar
- Department of Chemistry,
Biochemistry and Physics, Aspiring Scholars
Directed Research Program, Fremont, California 94539, United States
| | - Xina Wang
- Department of Chemistry,
Biochemistry and Physics, Aspiring Scholars
Directed Research Program, Fremont, California 94539, United States
| | - Neha Mandava
- Department of Chemistry,
Biochemistry and Physics, Aspiring Scholars
Directed Research Program, Fremont, California 94539, United States
| | - Srishti Venkatesan
- Department of Chemistry,
Biochemistry and Physics, Aspiring Scholars
Directed Research Program, Fremont, California 94539, United States
| | - Adrienne Ferguson
- Department of Chemistry,
Biochemistry and Physics, Aspiring Scholars
Directed Research Program, Fremont, California 94539, United States
| | - Aishi Rao
- Department of Chemistry,
Biochemistry and Physics, Aspiring Scholars
Directed Research Program, Fremont, California 94539, United States
| | - Emma Le
- Department of Chemistry,
Biochemistry and Physics, Aspiring Scholars
Directed Research Program, Fremont, California 94539, United States
| | - Casey Rojas
- Department of Chemistry,
Biochemistry and Physics, Aspiring Scholars
Directed Research Program, Fremont, California 94539, United States
| | - Edward Njoo
- Department of Chemistry,
Biochemistry and Physics, Aspiring Scholars
Directed Research Program, Fremont, California 94539, United States
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2
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Sanap D, Avhad L, Ghotekar S, Gaikwad ND. Green synthesis and characterization of mixed-phase Fe2O3 nanorods as a novel magnetically recoverable heterogeneous catalyst for Biginelli synthesis. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
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3
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Huseynzada A, Mori M, Meneghetti F, Israyilova A, Tuzun G, Sayin K, Chiarelli L, Mutlu C, Demiralp M, Hasanova U, Abbasov V. Synthesis, crystal structure, Hirshfeld surface, computational and antibacterial studies of a 9-phenanthrenecarboxaldehyde-based thiodihydropyrimidine derivative. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133571] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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4
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Zanin LL, Brito Matos TK, Leitão A, Ellena JA, Porto ALM. Biocatalytic kinetic resolution to access enantiomerically enriched dihydropyrimidinone/thiones via recognition of a remote stereocentre. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Lucas Lima Zanin
- Universidade de São Paulo: Universidade de Sao Paulo Physical Chemistry BRAZIL
| | | | - Andrei Leitão
- Universidade de São Paulo: Universidade de Sao Paulo Physical Chemistry BRAZIL
| | - Javier Alcides Ellena
- Universidade de São Paulo: Universidade de Sao Paulo Instituto de Física de São Carlos BRAZIL
| | - Andre Luiz Mleeiro Porto
- Universidade de São Paulo: Universidade de Sao Paulo Físico-Química Av. João Dagnone, 1.100 13568250 São Carlos BRAZIL
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5
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Neto BAD, Eberlin MN, Sherwood J. Solvent Screening Is Not Solvent Effect: A Review on the Most Neglected Aspect of Multicomponent Reactions. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200172] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Brenno A D. Neto
- Laboratory of Medicinal and Technological Chemistry University of Brasília Chemistry Institute (IQ-UnB), Campus Universitário Darcy Ribeiro, Brasília Distrito Federal 70904-900 Brazil
| | - Marcos N. Eberlin
- School of Material Engineering and Nanotechnology MackMass Laboratory Mackenzie Presbyterian University São Paulo SP 01302-907 Brazil
| | - James Sherwood
- Green Chemistry Centre of Excellence Department of Chemistry University of York Heslington North Yorkshire YO10 5DD UK
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6
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Zn salen complex supported on MnCoFe2O4(MCF) magnetic nanoparticles as a catalyst in the synthesis of 3,4-dihydropyrimidin-2 (1H)-ones/thiones (Biginelli-like reaction). RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04709-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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KUMAR GOBIND, BHARGAVA GAURAV, KUMAR YOGESH, KUMAR RUPESH. Eosin Y photocatalyzed access to Biginelli reaction using primary alcohols via domino multicomponent cascade: an approach towards sustainable synthesis of 3,4-dihydropyrimidin-2(1H)-ones. J CHEM SCI 2022. [DOI: 10.1007/s12039-022-02039-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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8
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Madivalappa Davanagere P, Maiti B. 1,3-Bis(carboxymethyl)imidazolium Chloride as a Sustainable, Recyclable, and Metal-Free Ionic Catalyst for the Biginelli Multicomponent Reaction in Neat Condition. ACS OMEGA 2021; 6:26035-26047. [PMID: 34660965 PMCID: PMC8515400 DOI: 10.1021/acsomega.1c02976] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 09/21/2021] [Indexed: 05/06/2023]
Abstract
A simple and novel methodology has been developed for the synthesis of 1,3-bis(carboxymethyl)imidazolium chloride [BCMIM][Cl] salt. The ionic salt [BCMIM][Cl] catalyzed the reaction among arylaldehydes; the substituted 1,3-dicarbonyl compounds and urea/thiourea at 80 °C with 5 mol % under neat condition provided the substituted dihydropyrimidin-2(1H)-one/thiones in the synthesis step with yields of up to 96%. In addition, we synthesized the commercially available drug Monastrol by employing this methodology. The new synthesis method employs the benefits of a broad substrate scope, short reaction time, and high atom economy along with low catalyst loading in neat conditions, and is devoid of chromatographic purification. The ionic salt [BCMIM][Cl] was recycled and reused up to six cycles without substantial damage of its catalytic efficiency.
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Affiliation(s)
| | - Barnali Maiti
- Department of Chemistry,
School of Advanced Sciences, Vellore Institute
of Technology, Vellore 632014, India
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9
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Krishna B, Payra S, Roy S. Synthesis of dihydropyrimidinones via multicomponent reaction route over acid functionalized Metal-Organic framework catalysts. J Colloid Interface Sci 2021; 607:729-741. [PMID: 34536933 DOI: 10.1016/j.jcis.2021.09.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 08/27/2021] [Accepted: 09/05/2021] [Indexed: 10/20/2022]
Abstract
Multi component reactions over heterogeneous solid acid catalysts are extremely important owing to easy separation, amenable recycling, and prospective scaling up of the process. Here, we are reporting the synthesis of biologically important dihydropyrimidinones over postsynthetic modified Cr-based metal-organic framework materials as heterogeneous catalysts containing the bifunctional Lewis and Brønsted acid sites. Cr-based metal-organic frameworks contained coordinatively unsaturated metal sites as inherent Lewis acid sites, whereas postsynthetic modifications introduced the Brønsted acid sites in the framework. A direct one pot synthesis route was employed to produce the pristine MOF in pure aqueous medium without using any additives. The bulk structure, morphology, surface and bonding properties of the synthesized materials were thoroughly characterized with powder XRD, FTIR, XPS, FE-SEM, TGA, and N2 sorption isotherms. A qualitative evolution of acid strength was carried out over the functionalized MOFs. Among the post synthetic functionalized materials, carboxylic acid functionalized framework exhibited a very high yield of dihydropyrimidinones under solvent less moderate reaction conditions. The catalyst also demonstrated a robust recyclability and wide substrate scope. Comparative study showed a very high catalytic activity of the postsynthetic modified MOFs in comparison to the reported literature. The reaction condition was optimized by varying parameters like solvent, temperature, reaction duration and catalyst loadings. The mechanistic studies indicated the involvement of both the Lewis and Brønsted sites acid sites of the catalysts in the multicomponent reaction.
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Affiliation(s)
- Bandarupalli Krishna
- Department of Chemistry, Birla Institute of Technology and Science (BITS) Pilani, Hyderabad Campus, Hyderabad-500078, India; Adama India Pvt. Ltd, Genome Valley Hyderabad - 500078, India
| | - Soumitra Payra
- Department of Chemistry, Birla Institute of Technology and Science (BITS) Pilani, Hyderabad Campus, Hyderabad-500078, India
| | - Sounak Roy
- Department of Chemistry, Birla Institute of Technology and Science (BITS) Pilani, Hyderabad Campus, Hyderabad-500078, India.
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10
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Efficient One-Pot Synthesis of 3,4-Dihydropyrimidin-2(1 H)-ones via a Three-Component Biginelli Reaction. Molecules 2021; 26:molecules26123753. [PMID: 34202951 PMCID: PMC8235482 DOI: 10.3390/molecules26123753] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 06/14/2021] [Accepted: 06/16/2021] [Indexed: 11/18/2022] Open
Abstract
Multicomponent reactions are considered to be of increasing importance as time progresses due to the economic and environmental advantages such strategies entail. The three-component Biginelli reaction involves the combination of an aldehyde, a β-ketoester and urea to produce 3,4-dihydropyrimidin-2(1H)-ones, also known as DHPMs. The synthesis of these products is highly important due to their myriad of medicinal properties, amongst them acting as calcium channel blockers and antihypertensive and anti-inflammatory agents. In this study, silicotungstic acid supported on Ambelyst-15 was used as a heterogeneous catalyst for the Biginelli reaction under solventless conditions. Electron-poor aromatic aldehydes gave the best results. Sterically hindered β-ketoesters resulted in lower reaction yields. The reaction was carried out under heterogeneous catalysis to allow easy recovery of the product from the reaction mixture and recycling of the catalyst. The heterogeneity of the reaction was confirmed by carrying out a hot filtration test.
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11
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Rodrigues MO, Eberlin MN, Neto BAD. How and Why to Investigate Multicomponent Reactions Mechanisms? A Critical Review. CHEM REC 2021; 21:2762-2781. [PMID: 33538117 DOI: 10.1002/tcr.202000165] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 01/04/2021] [Indexed: 01/03/2023]
Abstract
We review the most innovative efforts and greatest challenges faced when elucidating multicomponent reactions (MCRs) mechanisms. When compared to traditional reactions, the often two or more concurrent reactions pathways and the greater number of possible intermediates in MCRs turn their mechanistic investigation both a harder and trickier task. The common approaches used to investigate reaction mechanisms are often unable to clarify MCRs mechanisms; hence few but clever approaches are currently used to determine these mechanisms and to depict their key transformations. Their complexity has required most innovative approaches and the use of a number of unique techniques that have shed light over the favored pathway selected from the myriad of alternatives theoretically available for MCRs. This review focuses on the most successful efforts applied by a few leading groups to perform these puzzlingly investigations.
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Affiliation(s)
- Marcelo O Rodrigues
- Laboratory of Medicinal and Technological Chemistry, University of Brasília, Chemistry Institute (IQ-UnB), Campus Universitário Darcy Ribeiro, Brasília, Distrito Federal, 70904-970, Brazil.,School of Physics and Astronomy, Nottingham University, NG72RD, Nottingham, U.K
| | - Marcos N Eberlin
- MackMass Laboratory, PPGENM, School of Engineering, Mackenzie Presbyterian University, São Paulo, SP, 01302-907, Brazil
| | - Brenno A D Neto
- Laboratory of Medicinal and Technological Chemistry, University of Brasília, Chemistry Institute (IQ-UnB), Campus Universitário Darcy Ribeiro, Brasília, Distrito Federal, 70904-970, Brazil
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12
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Huseynzada AE, Jelch C, Akhundzada HVN, Soudani S, Ben Nasr C, Israyilova A, Doria F, Hasanova UA, Khankishiyeva RF, Freccero M. Synthesis, crystal structure and antibacterial studies of dihydropyrimidines and their regioselectively oxidized products. RSC Adv 2021; 11:6312-6329. [PMID: 35423136 PMCID: PMC8694924 DOI: 10.1039/d0ra10255e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 02/18/2021] [Accepted: 01/27/2021] [Indexed: 01/20/2023] Open
Abstract
The syntheses and investigations of new biologically active derivatives of dihydropyrimidines by Biginelli reaction in the presence of copper triflate are reported. Due to the fact that salicylaldehyde and its derivatives under Biginelli reaction conditions can lead to the formation of 2 types of dihydropyrimidines, the influence of copper triflate on product formation was also investigated. In addition to this, regioselective oxidation of dihydropyrimidines was performed in the presence of cerium ammonium nitrate and novel oxidized dihydropyrimidines were obtained. Single crystals of some of them were obtained and as a result, the structures of them were investigated by X-ray diffraction method, which allows determining the presence of hydrogen bonds in their structures. In addition to this, the presence of hydrogen bonds in their structures affects the formation of the corresponding tautomer during oxidizing of dihydropyrimidines. Since dihydropyrimidines are claimed to be biologically active compounds, activities of the synthesized compounds were studied against Acinetobacter baumanii, Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumoniae and Staphylococcus aureus bacteria. Known methods of synthesis of dihydropyrimidines and their oxidized products were modified, the impact of hydrogen bonds on stabilization of preferred tautomer and biological activities were studied.![]()
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Affiliation(s)
| | | | | | - Sarra Soudani
- Laboratoire de Chimie des Matériaux
- Faculté des Sciences de Bizerte
- Université de Carthage
- Zarzouna
- Tunisia
| | - Cherif Ben Nasr
- Laboratoire de Chimie des Matériaux
- Faculté des Sciences de Bizerte
- Université de Carthage
- Zarzouna
- Tunisia
| | - Aygun Israyilova
- Department of Molecular biology and Biotechnology
- Baku State University
- Baku
- Azerbaijan
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13
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Sadjadi S, Koohestani F, Heravi M. Biochar-Based Graphitic Carbon Nitride Adorned with Ionic Liquid Containing Acidic Polymer: A Versatile, Non-Metallic Catalyst for Acid Catalyzed Reaction. Molecules 2020; 25:E5958. [PMID: 33339246 PMCID: PMC7766038 DOI: 10.3390/molecules25245958] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 12/11/2020] [Accepted: 12/13/2020] [Indexed: 12/18/2022] Open
Abstract
A novel biochar-based graphitic carbon nitride was prepared through calcination of Zinnia grandiflora petals and urea. To provide acidic and ionic-liquid functionalities on the prepared carbon, the resultant biochar-based graphitic carbon nitride was vinyl functionalized and polymerized with 2-acrylamido-2-methyl-1-propanesulfonic acid, acrylic acid and the as-prepared 1-vinyl-3-butylimidazolium chloride. The final catalytic system that benefits from both acidic (-COOH and -SO3H) and ionic-liquid functionalities was applied as a versatile, metal-free catalyst for promoting some model acid catalyzed reactions such as Knoevenagel condensation and Biginelli reaction in aqueous media under a very mild reaction condition. The results confirmed high activity of the catalyst. Broad substrate scope and recyclability and stability of the catalyst were other merits of the developed protocols. Comparative experiments also indicated that both acidic and ionic-liquid functionalities on the catalyst participated in the catalysis.
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Affiliation(s)
- Samahe Sadjadi
- Gas Conversion Department, Faculty of Petrochemicals, Iran Polymer and Petrochemicals Institute, P.O. Box 14975112, Tehran 1497713115, Iran;
| | - Fatemeh Koohestani
- Gas Conversion Department, Faculty of Petrochemicals, Iran Polymer and Petrochemicals Institute, P.O. Box 14975112, Tehran 1497713115, Iran;
| | - Majid Heravi
- Department of Chemistry, School of Science, Alzahra University, P.O. Box 1993891176, Vanak, Tehran 1993891176, Iran
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14
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Malik AA, Dangroo NA, Ara T. Microwave‐Assisted Tandem Kornblum Oxidation and Biginelli Reaction for the Synthesis of Dihydropyrimidones. ChemistrySelect 2020. [DOI: 10.1002/slct.202002864] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Asif A. Malik
- Department of Chemistry Organic chemistry Division National Institute of Technology (NIT) Srinagar 190006 India
| | - Nisar A. Dangroo
- Department of Chemistry Organic chemistry Division National Institute of Technology (NIT) Srinagar 190006 India
| | - Tabassum Ara
- Department of Chemistry Organic chemistry Division National Institute of Technology (NIT) Srinagar 190006 India
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15
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Abstract
With their ability to dissolve inorganic as well as organic materials, ionic
liquids have emerged as a versatile solvent system for a diverse range of organic
transformations. In the past few decades, the literature has witnessed remarkable advances
in a wide range of organic conversions carried out in the presence of various imidazolium,
pyridinium, pyrrolidinium, quinolinium and diazobicyclo-octane based ionic liquids. In
the reaction, ionic liquids serve as a solvent, catalyst or sometimes both. In certain cases,
they are also modified with metal nanoparticles or complexes to form heterogeneous
catalysts or are immobilized onto solid support like agar-agar to act as solid-support
catalysts. Reactions catalysed by ionic liquids incorporating chiral catalysts possess the
advantageous features of being highly enantioselective and reproducible, besides being
economical and easy to handle. In this review, an updated insight regarding the role played by ionic liquids in
various C-C bond-forming organic reactions, has been summarized.
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Affiliation(s)
- Mandeep Kaur
- Department of Chemistry, Sri Guru Granth Sahib World University, Fatehgarh Sahib (Pb), India
| | - Opinder Kaur
- Department of Chemistry, Sri Guru Granth Sahib World University, Fatehgarh Sahib (Pb), India
| | - Rahul Badru
- Department of Chemistry, Sri Guru Granth Sahib World University, Fatehgarh Sahib (Pb), India
| | - Sandeep Kaushal
- Department of Chemistry, Sri Guru Granth Sahib World University, Fatehgarh Sahib (Pb), India
| | - Pritpal Singh
- Department of Chemistry, Sri Guru Granth Sahib World University, Fatehgarh Sahib (Pb), India
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16
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Huseynzada A, Jelsch C, Akhundzada H, Soudani S, Ben Nasr C, Doria F, Hasanova U, Freccero M. Synthesis, crystal structure and antibacterial properties of 6-methyl-2-oxo-4-(quinolin-2-yl)-1,2,3,4-tetrahydropyrimidine-5-carboxylate. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128581] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Santos MC, Uemi M, Gonçalves NS, Bizeto MA, Camilo FF. Niobium chloride in 1−n−butyl−3−methylimidazolium chloride ionic liquid as a catalyst for biginelli reaction. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128653] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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18
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Costanzo P, Nardi M, Oliverio M. Similarity and Competition between Biginelli and Hantzsch Reactions: an Opportunity for Modern Medicinal Chemistry. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901923] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Paola Costanzo
- Department of Health Sciences; University Magna Graecia of Catanzaro; Viale Europa - Loc. Germaneto 88100 Catanzaro Italy
| | - Monica Nardi
- Department of Health Sciences; University Magna Graecia of Catanzaro; Viale Europa - Loc. Germaneto 88100 Catanzaro Italy
| | - Manuela Oliverio
- Department of Health Sciences; University Magna Graecia of Catanzaro; Viale Europa - Loc. Germaneto 88100 Catanzaro Italy
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19
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Sadati Sorkhi SE, Hashemi MM, Ezabadi A. Introduction of a novel dicationic Brönsted acidic ionic liquid based on pyrazine and its application in the synthesis of xanthenediones and 3, 4-dihydropyrimidin-2(1H)-ones under solvent-free conditions. RESEARCH ON CHEMICAL INTERMEDIATES 2020. [DOI: 10.1007/s11164-020-04089-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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20
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21
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Singla P, Bhardwaj RD. Enzyme promiscuity – A light on the “darker” side of enzyme specificity. BIOCATAL BIOTRANSFOR 2019. [DOI: 10.1080/10242422.2019.1696779] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Prabhjot Singla
- Department of Biochemistry, Punjab Agricultural University, Ludhiana, India
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22
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Ghanbarian M, Beheshtiha SYS, Heravi MM, Mirzaei M, Zadsirjan V, Lotfian N. A Nano-sized Nd–Ag@polyoxometalate Catalyst for Catalyzing the Multicomponent Hantzsch and Biginelli Reactions. J CLUST SCI 2019. [DOI: 10.1007/s10876-019-01739-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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23
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Roy DK, Tamuli KJ, Bordoloi M. Exploiting silver trifluoromethanesulfonate as efficient and reusable catalyst for the synthesis of dihydropyrimidine derivatives under different reaction environments. J Heterocycl Chem 2019. [DOI: 10.1002/jhet.3728] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Dipak Kumar Roy
- Natural Products Chemistry Group, Chemical Sciences and Technology DivisionCSIR‐North East Institute of Science and Technology Jorhat Assam India
| | - Kashyap Jyoti Tamuli
- Natural Products Chemistry Group, Chemical Sciences and Technology DivisionCSIR‐North East Institute of Science and Technology Jorhat Assam India
- Academy of Scientific and Innovative Research, CSIR New Delhi India
| | - Manobjyoti Bordoloi
- Natural Products Chemistry Group, Chemical Sciences and Technology DivisionCSIR‐North East Institute of Science and Technology Jorhat Assam India
- Academy of Scientific and Innovative Research, CSIR New Delhi India
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24
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Understanding the Lack of Reactivity of 2,4-Dihydroxybenzaldehyde Towards the Biginelli Adduct Using Density Functional Theory Molecular Modeling. Processes (Basel) 2019. [DOI: 10.3390/pr7080521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The Biginelli reaction is a multicomponent reaction for obtaining dihydropyrimidinthiones quickly, with multiple substitution patterns. The reaction mechanism remains unclear. Three possible pathways proposed for the reaction are the iminium route, an enamine intermediate, and the Knoevenagel pathway. However, when thiourea was used, no theoretical calculations were reported. Thus, based on the literature, the iminium pathway was used to obtain evidence explaining the lack of reactivity of 2,4-dihydroxybenzaldehyde towards the Biginelli adduct, compared with 4-hydroxybenzaldehyde. This computational study, carried out using the B3LYP/6-31++G(d,p) level of theory, showed an increment of 150 kJ/mol in the activation energy of the slowest pathway, due to the presence of a hydroxyl group in position 2 (ortho) of the aromatic aldehyde, decreasing its reactivity. Natural bond orbital (NBO) calculations suggest that the determinant steps are simultaneous, i.e., the polarization of the carbonyl group and its corresponding protonation by the hydrogen of the SH fragment of the thiourea tautomer. The activation enthalpy values suggest that the nucleophile attack takes place later on the compound 2,4-dihydroxybenzaldehyde compared to 4-hydroxybenzaldehyde-TS, confirming that the OH group in position 2 hinders the condensation reaction.
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Kong R, Han SB, Wei JY, Peng XC, Xie ZB, Gong SS, Sun Q. Highly Efficient Synthesis of Substituted 3,4-Dihydropyrimidin-2-(1 H)-ones (DHPMs) Catalyzed by Hf(OTf)₄: Mechanistic Insights into Reaction Pathways under Metal Lewis Acid Catalysis and Solvent-Free Conditions. Molecules 2019; 24:E364. [PMID: 30669606 PMCID: PMC6359175 DOI: 10.3390/molecules24020364] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 01/15/2019] [Accepted: 01/18/2019] [Indexed: 12/02/2022] Open
Abstract
In our studies on the catalytic activity of Group IVB transition metal Lewis acids, Hf(OTf)₄ was identified as a highly potent catalyst for "one-pot, three-component" Biginelli reaction. More importantly, it was found that solvent-free conditions, in contrast to solvent-based conditions, could dramatically promote the Hf(OTf)₄-catalyzed formation of 3,4-dihydro-pyrimidin-2-(1H)-ones. To provide a mechanistic explanation, we closely examined the catalytic effects of Hf(OTf)₄ on all three potential reaction pathways in both "sequential bimolecular condensations" and "one-pot, three-component" manners. The experimental results showed that the synergistic effects of solvent-free conditions and Hf(OTf)₄ catalysis not only drastically accelerate Biginelli reaction by enhancing the imine route and activating the enamine route but also avoid the formation of Knoevenagel adduct, which may lead to an undesired byproduct. In addition, ¹H-MMR tracing of the H-D exchange reaction of methyl acetoacetate in MeOH-d₄ indicated that Hf(IV) cation may significantly accelerate ketone-enol tautomerization and activate the β-ketone moiety, thereby contributing to the overall reaction rate.
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Affiliation(s)
- Rui Kong
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, 605 Fenglin Avenue, Nanchang 330013, Jiangxi, China.
| | - Shuai-Bo Han
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, 605 Fenglin Avenue, Nanchang 330013, Jiangxi, China.
| | - Jing-Ying Wei
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, 605 Fenglin Avenue, Nanchang 330013, Jiangxi, China.
| | - Xiao-Chong Peng
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, 605 Fenglin Avenue, Nanchang 330013, Jiangxi, China.
| | - Zhen-Biao Xie
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, 605 Fenglin Avenue, Nanchang 330013, Jiangxi, China.
| | - Shan-Shan Gong
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, 605 Fenglin Avenue, Nanchang 330013, Jiangxi, China.
| | - Qi Sun
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, 605 Fenglin Avenue, Nanchang 330013, Jiangxi, China.
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26
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Freitas EF, Souza RY, Passos STA, Dias JA, Dias SCL, Neto BAD. Tuning the Biginelli reaction mechanism by the ionic liquid effect: the combined role of supported heteropolyacid derivatives and acidic strength. RSC Adv 2019; 9:27125-27135. [PMID: 35528552 PMCID: PMC9070657 DOI: 10.1039/c9ra03336j] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Accepted: 08/02/2019] [Indexed: 01/01/2023] Open
Abstract
Herein, a combination of heteropolyacids and ionic liquids as a catalytic system was studied for the Biginelli multicomponent reaction; the positive ionic liquid effect associated with the acidic strength of zeolite-supported heteropolyacids made this combination an efficient catalytic system for the multicomponent synthesis of 3,4-dihydropyrimidin-2(1H)-one/thione derivatives. The acidic strength effect was evaluated, and a range was determined in which the reaction provided better results. The mechanism of the reaction was also investigated in the presence and absence of ionic liquids, and two features of paramount importance were revealed: the mechanism could be tuned to proceed through only one reaction path among three possibilities and the kinetics of the reaction was significantly faster in the presence of an ionic liquid. Heteropolyacids and ionic liquid effect allowed tuning of the Biginelli reaction mechanism and synthesis of 3,4-dihydropyrimidin-2(1H)-one/thione derivatives in an efficient, recyclable fashion. The role of acidic strength and supported heteropolyacid is disclosed.![]()
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Affiliation(s)
- Elon F. Freitas
- Laboratory of Catalysis
- Chemistry Institute, (IQ-UnB)
- University of Brasília
- Campus Universitário Darcy Ribeiro – Asa Norte
- Brasília-DF
| | - Roberto Y. Souza
- Laboratory of Medicinal and Technological Chemistry
- University of Brasília
- Chemistry Institute (IQ-UnB)
- Campus Universitário Darcy Ribeiro
- Brasília-DF
| | - Saulo T. A. Passos
- Laboratory of Medicinal and Technological Chemistry
- University of Brasília
- Chemistry Institute (IQ-UnB)
- Campus Universitário Darcy Ribeiro
- Brasília-DF
| | - José A. Dias
- Laboratory of Catalysis
- Chemistry Institute, (IQ-UnB)
- University of Brasília
- Campus Universitário Darcy Ribeiro – Asa Norte
- Brasília-DF
| | - Silvia C. L. Dias
- Laboratory of Catalysis
- Chemistry Institute, (IQ-UnB)
- University of Brasília
- Campus Universitário Darcy Ribeiro – Asa Norte
- Brasília-DF
| | - Brenno A. D. Neto
- Laboratory of Medicinal and Technological Chemistry
- University of Brasília
- Chemistry Institute (IQ-UnB)
- Campus Universitário Darcy Ribeiro
- Brasília-DF
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27
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Feng L, Ye R, Yuan T, Zhang X, Lu GP, Zhou B. A concerted addition mechanism in [Hmim]Br-triggered thiol–ene reactions: a typical “ionic liquid effect” revealed by DFT and experimental studies. NEW J CHEM 2019. [DOI: 10.1039/c8nj05674a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The π+–π and H-bond interactions between [Hmim]Br and substrates promote a special one-step addition mechanism in thiol–ene reactions.
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Affiliation(s)
- Lin Feng
- Chemical Engineering College
- Nanjing University of Science & Technology Xiaolingwei 200
- Nanjing
- China
| | - Renlong Ye
- Chemical Engineering College
- Nanjing University of Science & Technology Xiaolingwei 200
- Nanjing
- China
| | - Tao Yuan
- Chemical Engineering College
- Nanjing University of Science & Technology Xiaolingwei 200
- Nanjing
- China
| | - Xiao Zhang
- Chemical Engineering College
- Nanjing University of Science & Technology Xiaolingwei 200
- Nanjing
- China
| | - Guo-ping Lu
- Chemical Engineering College
- Nanjing University of Science & Technology Xiaolingwei 200
- Nanjing
- China
| | - Baojing Zhou
- Chemical Engineering College
- Nanjing University of Science & Technology Xiaolingwei 200
- Nanjing
- China
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28
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Braga TC, Silva TF, Maciel TMS, da Silva ECD, da Silva-Júnior EF, Modolo LV, Figueiredo IM, Santos JCC, de Aquino TM, de Fátima Â. Ionic liquid-assisted synthesis of dihydropyrimidin(thi)one Biginelli adducts and investigation of their mechanism of urease inhibition. NEW J CHEM 2019. [DOI: 10.1039/c9nj03556g] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three out of twenty-six synthesized Biginelli adducts were identified as potent competitive urease inhibitors.
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29
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Ramos LM, Rodrigues MO, Neto BAD. Mechanistic knowledge and noncovalent interactions as the key features for enantioselective catalysed multicomponent reactions: a critical review. Org Biomol Chem 2019; 17:7260-7269. [DOI: 10.1039/c9ob01088b] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This critical short review focuses on some key features which determine successful enantioselective catalysed multicomponent reactions (MCRs) and are typically underappreciated in the literature.
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Affiliation(s)
- Luciana M. Ramos
- Unidade Universitária de Ciências Exatas e Tecnológicas
- Universidade Estadual de Goiás
- Anápolis
- Brazil
| | | | - Brenno A. D. Neto
- Laboratory of Medicinal and Technological Chemistry
- University of Brasília
- Chemistry Institute (IQ-UnB)
- Campus Universitário Darcy Ribeiro
- Brasília
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30
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Mekki S, Krabia L, Mohamed SMS, Saidi-Besbes S. Synthesis of 3,4-Dihydropyrimidin-2(1H)-one Derivatives Using Activated Montmorillonite as Catalyst. LETT ORG CHEM 2018. [DOI: 10.2174/1570178615666180627113617] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
An efficient catalytic synthesis of 4-aryl-3,4-dihydropyrimidine-2(1H)-one derivatives using
copper (II), iron (III) and zinc (II) exchanged montmorillonite clays as a catalyst is described. The desired
products were obtained in good yields.
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Affiliation(s)
- Sofiane Mekki
- Laboratoire de Synthese Organique Appliquee LSOA, Universite d'Oran 1 Ahmed Benbella, Departement de Chimie, Bp 1524 El M'Naouer, Oran 31000, Algeria
| | - Lahcen Krabia
- Laboratoire de Synthese Organique Appliquee LSOA, Universite d'Oran 1 Ahmed Benbella, Departement de Chimie, Bp 1524 El M'Naouer, Oran 31000, Algeria
| | - Saleh Mahmoud Saleh Mohamed
- Laboratoire de Synthese Organique Appliquee LSOA, Universite d'Oran 1 Ahmed Benbella, Departement de Chimie, Bp 1524 El M'Naouer, Oran 31000, Algeria
| | - Salima Saidi-Besbes
- Laboratoire de Synthese Organique Appliquee LSOA, Universite d'Oran 1 Ahmed Benbella, Departement de Chimie, Bp 1524 El M'Naouer, Oran 31000, Algeria
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31
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Khaskel A, Barman P, Maiti SK, Jana U. Nebivolol nanoparticles: a first catalytic use in Biginelli and Biginelli-like reactions. CAN J CHEM 2018. [DOI: 10.1139/cjc-2017-0621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Herein, we report the catalytic activity of nebivolol nanoparticles a novel organocatalyst for the synthesis of DHPMs and DHPM-5-carboxamides. The nanoparticles are confirmed by DSC, TEM, AFM, and IR spectroscopy. The catalyst can be readily recovered and reused for the next four runs without any significant impact on the yields of the products. The products are fully characterized by FTIR, 1H NMR, 13C NMR, and distortionless enhanced polarization transfer (DEPT) NMR. The methodology adopted here offers several advantages such as solvent-free reaction, low loading of catalyst, short reaction times, and quantifiable yields.
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Affiliation(s)
- Anamika Khaskel
- Department of Chemistry, National Institute of Technology, Silchar 788010, Assam, India
| | - Pranjit Barman
- Department of Chemistry, National Institute of Technology, Silchar 788010, Assam, India
| | - Subir Kumar Maiti
- Department of Chemistry, National Institute of Technology, Silchar 788010, Assam, India
| | - Utpal Jana
- School of Pharmacy, Chouksey Engineering College, Lal Khadan, NH-49, Bilaspur 495004, India
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32
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Current progress in asymmetric Biginelli reaction: an update. Mol Divers 2018; 22:751-767. [DOI: 10.1007/s11030-018-9841-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2018] [Accepted: 06/12/2018] [Indexed: 12/12/2022]
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33
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Dos Santos PR, Pereira CMP, Ritter M, de Paula FR, Moura S. Relationship between Hammett's parameters and in silico density functional with tandem mass ESI-CID fragmentation: Dihydropyridines as prototypes. JOURNAL OF MASS SPECTROMETRY : JMS 2018; 53:195-202. [PMID: 29194867 DOI: 10.1002/jms.4050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 10/06/2017] [Accepted: 11/21/2017] [Indexed: 06/07/2023]
Abstract
Over the years, with the instrumental analysis evolution, the relationships between the carried-out results with the data of theoretical analysis in silico and the Hammett's parameters have been reported. They have been very useful for chemical characterization of small organic molecules. Thus, this work aims at showing the feasibility and limitations for Hammett's and density functional theory applications in electrospray ionization-collision-induced dissociation (ESI-CID) fragmentation provision. For this, 13 dihydropyrimidinones para, meta, and orto monosubstituted were studied using ESI and CID in positive mode. As a result, it was observed that the main fragmentation includes the isocyanate and ethanol loses at low energy. Nevertheless, at higher energies, radical ions formed by McLafferty rearrangement were observed. The Hammett plots were correlated fragmentation profiles, showing good linearity for the [M + H]+ , which does not occur to radical ions and carbocation's. These tendencies had demonstrated that the stability of protonate and activation energy of secondary ions changes with the pKa. The density functional theory studies indicated that, both nitrogen atoms in the dihydropyrimidinone's prototypes are capable of being protonated. However, the activation energy of fragmentation products is not changed. Therefore, this work has shown information, which can be useful to understand tandem mass spectrometry in ESI-CID conditions for small organic molecules series. This is the first step for normalization of fragmentation pathway.
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Affiliation(s)
- P R Dos Santos
- Laboratory of Natural and Synthetics Products, University of Caxias do Sul, Caxias do Sul, Brazil
| | - C M P Pereira
- Chemical Sciences, Pharmaceutical and Food Center, University of Pelotas, Brazil
| | - M Ritter
- Chemical Sciences, Pharmaceutical and Food Center, University of Pelotas, Brazil
| | - F R de Paula
- Laboratory of Drug Development and Quality Control, University Federal of Pampa, Brazil
| | - S Moura
- Laboratory of Natural and Synthetics Products, University of Caxias do Sul, Caxias do Sul, Brazil
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34
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Zheng S, Jian Y, Xu S, Wu Y, Sun H, Zhang G, Zhang W, Gao Z. N-Donor ligand activation of titanocene for the Biginelli reaction via the imine mechanism. RSC Adv 2018; 8:8657-8661. [PMID: 35539863 PMCID: PMC9078600 DOI: 10.1039/c8ra01208c] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 02/14/2018] [Indexed: 12/04/2022] Open
Abstract
The remarkable activation of stable titanocene dichloride (Cp2TiCl2) was achieved using N-donor ligand urea in an alcoholic solvent, leading to the formation of a Ti(iv) species [(MeO)2Ti(NHCONH2)]+, the existence of which was verified by ESI-MS, ESI-MS/MS, and NMR. Catalyzed by the newly formed Ti(iv) species, a myriad of 3,4-dihydropyrimidin-2-(1H)-ones were produced via a three-component Biginelli reaction. Further mechanistic investigation indicated that the Biginelli reaction had taken place via the imine route. Stable titanocene dichloride (Cp2TiCl2) was activated by the N-donor ligand urea to form [(MeO)2Ti(NHCONH2)]+, which catalyzed the Biginelli reaction to produce 3,4-dihydropyrimidin-2-(1H)-ones.![]()
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Affiliation(s)
- Shaohua Zheng
- Key Laboratory of Applied Surface and Colloid Chemistry
- MOE
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi’an 710062
| | - Yajun Jian
- Key Laboratory of Applied Surface and Colloid Chemistry
- MOE
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi’an 710062
| | - Shan Xu
- Key Laboratory of Applied Surface and Colloid Chemistry
- MOE
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi’an 710062
| | - Ya Wu
- Key Laboratory of Applied Surface and Colloid Chemistry
- MOE
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi’an 710062
| | - Huaming Sun
- Key Laboratory of Applied Surface and Colloid Chemistry
- MOE
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi’an 710062
| | - Guofang Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry
- MOE
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi’an 710062
| | - Weiqiang Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry
- MOE
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi’an 710062
| | - Ziwei Gao
- Key Laboratory of Applied Surface and Colloid Chemistry
- MOE
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi’an 710062
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35
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Sachdev D. Silica polymer nanocomposites functionalized with polyphosphoric acid: A mild catalyst for efficient one-pot synthesis of dihydropyrimidinones under environmentally benign conditions. INORG NANO-MET CHEM 2017. [DOI: 10.1080/24701556.2016.1241268] [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)
- Divya Sachdev
- Department of Agriculture and Environment Sciences, National Institute of Food Technology Entrepreneurship and Management, Kundli–Sonipat, Haryana, India
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36
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Sustainable synthetic approaches using [C16Im][Oxa] as a flexible organocatalyst and DFT studies toward 3,4-dihydropyrimidinones and benzoxazines. MONATSHEFTE FUR CHEMIE 2017. [DOI: 10.1007/s00706-016-1894-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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37
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Afradi M, Foroughifar N, Pasdar H, Moghanian H, Foroughifar N. Facile green one-pot synthesis of novel thiazolo[3,2-a]pyrimidine derivatives using Fe3
O4
@l
-arginine and their biological investigation as potent antimicrobial agents. Appl Organomet Chem 2016. [DOI: 10.1002/aoc.3683] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- M. Afradi
- Department of Chemistry, Tehran North Branch; Islamic Azad University; Tehran Iran
| | - N. Foroughifar
- Department of Chemistry, Tehran North Branch; Islamic Azad University; Tehran Iran
| | - H. Pasdar
- Department of Chemistry, Tehran North Branch; Islamic Azad University; Tehran Iran
| | - H. Moghanian
- Department of Chemistry, Dezful Branch; Islamic Azad University; Dezful Iran
| | - N. Foroughifar
- Division of Diabetes, Endocrinology and Metabolism, Faculty of Medicine; Imperial College London; London W12 ONN UK
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39
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Zolfigol MA, Ghaderi H, Baghery S, Mohammadi L. Nanometasilica disulfuric acid (NMSDSA) and nanometasilica monosulfuric acid sodium salt (NMSMSA) as two novel nanostructured catalysts: applications in the synthesis of Biginelli-type, polyhydroquinoline and 2,3-dihydroquinazolin-4(1H)-one derivatives. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2016. [DOI: 10.1007/s13738-016-0964-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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40
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Savanur HM, Kalkhambkar RG, Aridoss G, Laali KK. [bmim(SO 3 H)][OTf]/[bmim][X] and Zn(NTf 2 ) 2 /[bmim][X] (X = PF 6 and BF 4 ); efficient catalytic systems for the synthesis of tetrahydropyrimidin-ones (-thiones) via the Biginelli reaction. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.05.103] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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41
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Liu Z, Ma R, Cao D, Liu C. New Efficient Synthesis of 3,4-Dihydropyrimidin-2(1H)-ones Catalyzed by Benzotriazolium-Based Ionic Liquids under Solvent-Free Conditions. Molecules 2016; 21:462. [PMID: 27070558 PMCID: PMC6273612 DOI: 10.3390/molecules21040462] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2016] [Revised: 03/30/2016] [Accepted: 04/05/2016] [Indexed: 12/02/2022] Open
Abstract
An efficient synthesis of novel 3,4-dihydropyrimidin-2(1H)-ones (DHPMs) and their derivatives, using Brønsted acidic ionic liquid [C2O2BBTA][TFA] as a catalyst, from the condensation of aryl aldehyde, β-ketoester and urea was described. Reactions proceeded smoothly for 40 min under solvent-free conditions and gave the desirable products with good to excellent yields (up to 99%). The catalyst could be easily recycled and reused with similar efficacies for at least six cycles.
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Affiliation(s)
- Zhiqing Liu
- Key Laboratory of Oil and Gas Fine Chemicals of Ministry of Education, School of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China.
| | - Rong Ma
- Key Laboratory of Oil and Gas Fine Chemicals of Ministry of Education, School of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China.
| | - Dawei Cao
- Key Laboratory of Oil and Gas Fine Chemicals of Ministry of Education, School of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China.
| | - Chenjiang Liu
- Key Laboratory of Oil and Gas Fine Chemicals of Ministry of Education, School of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China.
- Physics and Chemistry Detecting Center, Xinjiang University, Urumqi 830046, China.
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42
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Pavez P, Millán D, Rojas M, Morales JI, Santos JG. Reaction Mechanism in Ionic Liquids: Kinetics and Mechanism of the Aminolysis of 4-Nitrophenyl Acetate. INT J CHEM KINET 2016. [DOI: 10.1002/kin.20994] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Paulina Pavez
- Facultad de Química; Pontificia Universidad Católica de Chile; Casilla 306 Santiago 6094411 Chile
| | - Daniela Millán
- Facultad de Química; Pontificia Universidad Católica de Chile; Casilla 306 Santiago 6094411 Chile
| | - Mabel Rojas
- Facultad de Química; Pontificia Universidad Católica de Chile; Casilla 306 Santiago 6094411 Chile
| | - Javiera I. Morales
- Facultad de Química; Pontificia Universidad Católica de Chile; Casilla 306 Santiago 6094411 Chile
| | - José G. Santos
- Facultad de Química; Pontificia Universidad Católica de Chile; Casilla 306 Santiago 6094411 Chile
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43
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Khiratkar AG, Muskawar PN, Bhagat PR. Polymer-supported benzimidazolium based ionic liquid: an efficient and reusable Brønsted acid catalyst for Biginelli reaction. RSC Adv 2016. [DOI: 10.1039/c6ra23781a] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A polymer-supported benzimidazolium based ionic liquid (PSBIL) was synthesized by reaction of poly(vinylbenzyl chloride) and benzimidazole followed by ring opening of 1,4-butane sultone and acidification with sulphuric acid.
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44
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Khazaei A, Zolfigol MA, Alaie S, Baghery S, Kaboudin B, Bayat Y, Asgari A. {[MIM-NO2]C(NO2)3} a unique nano ionic liquid: application to the synthesis of novel Biginelli-type compounds. RSC Adv 2016. [DOI: 10.1039/c5ra24619a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
1-Methyl-3-nitro-1H-imidazol-3-ium trinitromethanide {[MIM-NO2]C(NO2)3} as a novel and green NIL catalyst was synthesized, characterized and used to Biginelli reaction at room temperature under solvent-free conditions.
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Affiliation(s)
- Ardeshir Khazaei
- Department of Organic Chemistry
- Faculty of Chemistry
- Bu-Ali Sina University
- Hamedan 6517838683
- Iran
| | - Mohammad Ali Zolfigol
- Department of Organic Chemistry
- Faculty of Chemistry
- Bu-Ali Sina University
- Hamedan 6517838683
- Iran
| | - Saied Alaie
- Department of Organic Chemistry
- Faculty of Chemistry
- Bu-Ali Sina University
- Hamedan 6517838683
- Iran
| | - Saeed Baghery
- Department of Organic Chemistry
- Faculty of Chemistry
- Bu-Ali Sina University
- Hamedan 6517838683
- Iran
| | - Babak Kaboudin
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan 45137-66731
- Iran
| | - Yadollah Bayat
- Faculty of Chemistry and Chemical Engineering
- Malek Ashtar University of Technology
- Tehran
- Iran
| | - Asiye Asgari
- Faculty of Chemistry and Chemical Engineering
- Malek Ashtar University of Technology
- Tehran
- Iran
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45
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Pavez P, Millán D, Morales J, Rojas M, Céspedes D, Santos JG. Reaction mechanisms in ionic liquids: the kinetics and mechanism of the reaction of O,O-diethyl (2,4-dinitrophenyl) phosphate triester with secondary alicyclic amines. Org Biomol Chem 2016; 14:1421-7. [DOI: 10.1039/c5ob02128f] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
In the title reaction, the ionic liquids used stabilized the zwitterionic pentacoordinate intermediate (P±), leading to a change in the mechanism from concerted to stepwise.
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Affiliation(s)
- Paulina Pavez
- Facultad de Química. Pontificia Universidad Católica de Chile
- Santiago 6094411
- Chile
| | - Daniela Millán
- Facultad de Química. Pontificia Universidad Católica de Chile
- Santiago 6094411
- Chile
| | - Javiera Morales
- Facultad de Química. Pontificia Universidad Católica de Chile
- Santiago 6094411
- Chile
| | - Mabel Rojas
- Facultad de Química. Pontificia Universidad Católica de Chile
- Santiago 6094411
- Chile
| | - Daniel Céspedes
- Facultad de Química. Pontificia Universidad Católica de Chile
- Santiago 6094411
- Chile
| | - José G. Santos
- Facultad de Química. Pontificia Universidad Católica de Chile
- Santiago 6094411
- Chile
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46
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Iron-catalyzed four-member multicomponent reaction for assembly of (E)-6-arylvinyl-3,4-dihydropyrimidin-2(1H)-ones. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.07.039] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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47
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Puripat M, Ramozzi R, Hatanaka M, Parasuk W, Parasuk V, Morokuma K. The Biginelli Reaction Is a Urea-Catalyzed Organocatalytic Multicomponent Reaction. J Org Chem 2015; 80:6959-67. [DOI: 10.1021/acs.joc.5b00407] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Maneeporn Puripat
- Nanoscience
and Technology Program, Graduate School, Chulalongkorn University, Bangkok 10330, Thailand
- Fukui
Institute for Fundamental Chemistry (FIFC), Kyoto University, Kyoto 606-8103, Japan
| | - Romain Ramozzi
- Fukui
Institute for Fundamental Chemistry (FIFC), Kyoto University, Kyoto 606-8103, Japan
| | - Miho Hatanaka
- Fukui
Institute for Fundamental Chemistry (FIFC), Kyoto University, Kyoto 606-8103, Japan
| | - Waraporn Parasuk
- Department
of Chemistry, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
| | - Vudhichai Parasuk
- Nanoscience
and Technology Program, Graduate School, Chulalongkorn University, Bangkok 10330, Thailand
- Department
of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Keiji Morokuma
- Fukui
Institute for Fundamental Chemistry (FIFC), Kyoto University, Kyoto 606-8103, Japan
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48
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Synthesis of 3,4-dihydropyrimidin-2(1H)-one via one-pot Biginelli reaction under solvent-free conditions. MONATSHEFTE FUR CHEMIE 2015. [DOI: 10.1007/s00706-015-1505-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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49
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Rodrigues TS, Machado F, Lalli PM, Eberlin MN, Neto BA. Styrene polymerization efficiently catalyzed by iron-containing imidazolium-based ionic liquids: Reaction mechanism and enhanced ionic liquid effect. CATAL COMMUN 2015. [DOI: 10.1016/j.catcom.2014.11.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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50
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Elhamifar D, Nazari E. Preparation of Iron-Containing Schiff Base and Ionic Liquid Based Bifunctional Periodic Mesoporous Organosilica and Its Application in the Synthesis of 3,4-Dihydropyrimidinones. Chempluschem 2015; 80:820-826. [DOI: 10.1002/cplu.201402415] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Indexed: 11/09/2022]
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