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Li L, Wang W, Huang J, Dun R, Lu B, Liu Y, Wu J, Yang S, Hua Z. Facile and template-free synthesis of robust, highly active and easily recyclable submicrometer-sized hierarchical TS-1 aggregates composed of ultra-small nanocrystallites (<50 nm). CrystEngComm 2023. [DOI: 10.1039/d3ce00127j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Abstract
Submicrometer-sized hierarchical TS-1 aggregates were synthesized by freeze-drying of precursors and routine steam assisted crystallization. The catalysts exhibited easy isolation and high activity in the oxidative desulfurization of fuel oils.
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2
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Yu Y, Tang Z, Wang J, Wang R, Chen Z, Liu H, Shen K, Huang X, Liu Y, He M. Insights into the efficiency of hydrogen peroxide utilization over titanosilicate/H2O2 systems. J Catal 2020. [DOI: 10.1016/j.jcat.2019.09.045] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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3
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Kumar AD, Prabhudeva MG, Bharath S, Kumara K, Lokanath NK, Kumar KA. Design and Amberlyst-15 mediated synthesis of novel thienyl-pyrazole carboxamides that potently inhibit Phospholipase A2 by binding to an allosteric site on the enzyme. Bioorg Chem 2018; 80:444-452. [PMID: 29986189 DOI: 10.1016/j.bioorg.2018.06.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 06/14/2018] [Accepted: 06/18/2018] [Indexed: 12/25/2022]
Abstract
Inflammation-mediated disorders are on the rise and hence, there is an urgent need for the design and synthesis of new anti-inflammatory drugs with higher affinity and specificity for their potential targets. The current study presents an effective and new protocol for the synthesis of thienyl-pyrazoles through 3 + 2 annulations using a recyclable heterogeneous catalyst Amberlyst-15. Chalcones 3(a-g) prepared from 3-methylthiophene-2-carbaldehyde and acetophenones by Claisen-Schmidt approach reacted with semicarbazide hydrochloride 4 in the presence of Amberlyst-15 in acetonitrile at room temperature producing thienyl-pyrazole carboxamides 5(a-h) in good yields. Alternatively, the compounds 5(a-h) were prepared by conventional method using acetic acid (30%) medium. Structures of synthesized new pyrazoles were confirmed by spectral and crystallographic studies. All the new compounds were evaluated for their in vitro inhibition of Phospholipase A2 from Vipera russelli and preliminary studies revealed that, amongst the designed series, compounds 5b, 5c and 5h showed promising inhibition. Further, the compounds exhibited linear mixed-type inhibition behavior for the sPLA2 enzyme indicating that they bind to an allosteric site distinct from either the calcium or substrate binding site on the enzyme. These kinetic conclusions were further validated by macromolecular rigid-body docking whereby compounds 5c and 5h showed binding to distinct pockets on the protein. These findings present a promising series of lead molecules that can serve as prototypes for the treatment of inflammatory related disorders.
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Affiliation(s)
- Achutha Dileep Kumar
- Department of Chemistry, Yuvaraja College, University of Mysore, Mysuru 570005, India
| | | | - Srinivasan Bharath
- Marie Skłodowska-Curie Actions Fellow, Rua da Quinta Grande, 6, 2780-156 Oeiras, Portugal
| | - Karthik Kumara
- Department of Studies in Physics, University of Mysore, Mysuru 570006, India
| | | | - Kariyappa Ajay Kumar
- Department of Chemistry, Yuvaraja College, University of Mysore, Mysuru 570005, India.
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4
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Amberlyst-15 catalyzed synthesis of novel thiophene–pyrazoline derivatives: spectral and crystallographic characterization and anti-inflammatory and antimicrobial evaluation. RESEARCH ON CHEMICAL INTERMEDIATES 2018. [DOI: 10.1007/s11164-018-3501-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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5
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Mazur M, Kasneryk V, Přech J, Brivio F, Ochoa-Hernández C, Mayoral A, Kubů M, Čejka J. Zeolite framework functionalisation by tuneable incorporation of various metals into the IPC-2 zeolite. Inorg Chem Front 2018. [DOI: 10.1039/c8qi00732b] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The incorporation of metals into the IPC-2 zeolite framework was performed. Synthesised materials were tested in catalysis.
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Affiliation(s)
- Michal Mazur
- Department of Physical and Macromolecular Chemistry
- Faculty of Science
- Charles University
- 128 43 Prague 2
- Czech Republic
| | - Valeryia Kasneryk
- Department of Physical and Macromolecular Chemistry
- Faculty of Science
- Charles University
- 128 43 Prague 2
- Czech Republic
| | - Jan Přech
- Department of Physical and Macromolecular Chemistry
- Faculty of Science
- Charles University
- 128 43 Prague 2
- Czech Republic
| | - Federico Brivio
- Department of Physical and Macromolecular Chemistry
- Faculty of Science
- Charles University
- 128 43 Prague 2
- Czech Republic
| | - Cristina Ochoa-Hernández
- J. Heyrovský Institute of Physical Chemistry
- Academy of Sciences of the Czech Republic
- Prague 8
- Czech Republic
| | - Alvaro Mayoral
- School of Physical Science and Technology ShanghaiTech University
- Shanghai
- China
- Advanced Microscopy Laboratory (LMA)
- Nanoscience Institute of Aragon (INA)
| | - Martin Kubů
- J. Heyrovský Institute of Physical Chemistry
- Academy of Sciences of the Czech Republic
- Prague 8
- Czech Republic
| | - Jiří Čejka
- Department of Physical and Macromolecular Chemistry
- Faculty of Science
- Charles University
- 128 43 Prague 2
- Czech Republic
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Bregante DT, Flaherty DW. Periodic Trends in Olefin Epoxidation over Group IV and V Framework-Substituted Zeolite Catalysts: A Kinetic and Spectroscopic Study. J Am Chem Soc 2017; 139:6888-6898. [PMID: 28453262 DOI: 10.1021/jacs.7b01422] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Group IV and V framework-substituted zeolites have been used for olefin epoxidation reactions for decades, yet the underlying properties that determine the selectivities and turnover rates of these catalysts have not yet been elucidated. Here, a combination of kinetic, thermodynamic, and in situ spectroscopic measurements show that when group IV (i.e., Ti, Zr, and Hf) or V (i.e., Nb and Ta) transition metals are substituted into zeolite *BEA, the metals that form stronger Lewis acids give greater selectivities and rates for the desired epoxidation pathway and present smaller enthalpic barriers for both epoxidation and H2O2 decomposition reactions. In situ UV-vis spectroscopy shows that these group IV and V materials activate H2O2 to form pools of hydroperoxide, peroxide, and superoxide intermediates. Time-resolved UV-vis measurements and the isomeric distributions of Z-stilbene epoxidation products demonstrate that the active species for epoxidations on group IV and V transition metals are only M-OOH/-(O2)2- and M-(O2)- species, respectively. Mechanistic interpretations of kinetic data suggest that these group IV and V materials catalyze cyclohexene epoxidation and H2O2 decomposition through largely identical Eley-Rideal mechanisms that involve the irreversible activation of coordinated H2O2 followed by reaction with an olefin or H2O2. Epoxidation rates and selectivities vary over five- and two-orders of magnitude, respectively, among these catalysts and depend exponentially on the energy for ligand-to-metal charge transfer (LMCT) and the functional Lewis acid strength of the metal centers. Together, these observations show that more electrophilic active-oxygen species (i.e., lower-energy LMCT) are more reactive and selective for epoxidations of electron-rich olefins and explain why Ti-based catalysts have been identified as the most active among early transition metals for these reactions. Further, H2O2 decomposition (the undesirable reaction pathway) possesses a weaker dependence on Lewis acidity than epoxidation, which suggests that the design of catalysts with increased Lewis acid strength will simultaneously increase the reactivity and selectivity of olefin epoxidation.
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Affiliation(s)
- Daniel T Bregante
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - David W Flaherty
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
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Shin SB, Lee DW, Chadwick D. The effects of impregnation of precious metals on the catalytic activity of titanium silicate (TS-1) in epoxidation of propene using hydrogen peroxide. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcata.2016.07.053] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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8
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Selective synthesis of propylene oxide through liquid-phase epoxidation of propylene with H2O2 over formed Ti-MWW catalyst. J Catal 2016. [DOI: 10.1016/j.jcat.2016.07.020] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Maleki A, Aghaei M, Ghamari N. Synthesis of Benzimidazolo[2,3-b]quinazolinone Derivatives via a One-pot Multicomponent Reaction Promoted by a Chitosan-based Composite Magnetic Nanocatalyst. CHEM LETT 2015. [DOI: 10.1246/cl.141074] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Ali Maleki
- Department of Chemistry, Iran University of Science and Technology
| | - Morteza Aghaei
- Department of Chemistry, Iran University of Science and Technology
| | - Nakisa Ghamari
- Department of Chemistry, Iran University of Science and Technology
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Rambabu D, Murthi PRK, Dulla B, Basaveswara Rao MV, Pal M. Amberlyst-15–Catalyzed Synthesis of 2-Substituted 1,3-Benzazoles in Water under Ultrasound. SYNTHETIC COMMUN 2013. [DOI: 10.1080/00397911.2013.769605] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- D. Rambabu
- a Department of Chemistry , K. L. University Vaddeswaram , Guntur , Andhra Pradesh , India
- b Dr. Reddy's Institute of Life Sciences, University of Hyderabad Campus, Gachibowli , Hyderabad , Andhra Pradesh , India
| | | | - Balakrishna Dulla
- a Department of Chemistry , K. L. University Vaddeswaram , Guntur , Andhra Pradesh , India
| | - M. V. Basaveswara Rao
- c Department of Chemistry , Krishna University , Machilipatnam , Andhra Pradesh , India
| | - Manojit Pal
- b Dr. Reddy's Institute of Life Sciences, University of Hyderabad Campus, Gachibowli , Hyderabad , Andhra Pradesh , India
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11
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Ultrasound-based approach to spiro-2,3-dihydroquinazolin-4(1H)-ones: their in vitro evaluation against chorismate mutase. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2012.11.057] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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12
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Sunke R, Adepu R, Kapavarapu R, Chintala S, Meda CLT, Parsa KVL, Pal M. Vinylic amino group activation: a new and general strategy leading to functionalized fused heteroaromatics. Chem Commun (Camb) 2013; 49:3570-2. [DOI: 10.1039/c3cc41337c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Kumar SK, Rambabu D, Kumar CHV, Sreenivas BY, Prasad KRS, Rao MVB, Pal M. Catalysis by Amberlyst-15 under ultrasound in water: a green synthesis of 1,2,4-benzothiadiazine-1,1-dioxides and their spiro derivatives. RSC Adv 2013. [DOI: 10.1039/c3ra44703k] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
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14
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Amberlyst-15® in PEG: A novel catalytic system for the facile and efficient one-pot synthesis of benzothiazolo-[2,3-b]-quinazolinone derivatives. Sci China Chem 2012. [DOI: 10.1007/s11426-012-4665-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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15
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VNS Murthy P, Rambabu D, Rama Krishna G, Malla Reddy C, Prasad K, Basaveswara Rao M, Pal M. Amberlyst-15 mediated synthesis of 2-substituted 2,3-dihydroquinazolin-4(1H)-ones and their crystal structure analysis. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2011.12.023] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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16
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Shin SB, Chadwick D. Kinetics of Heterogeneous Catalytic Epoxidation of Propene with Hydrogen Peroxide over Titanium Silicalite (TS-1). Ind Eng Chem Res 2010. [DOI: 10.1021/ie100083u] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Sang Baek Shin
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - David Chadwick
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, United Kingdom
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17
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Liu JY, Liu J, Wang JD, Jiao DQ, Liu HW. Efficient, Ecofriendly, and Practical Process for the Synthesis of Quinoxalines Catalyzed by Amberlyst-15 in Aqueous Media. SYNTHETIC COMMUN 2010. [DOI: 10.1080/00397910903219401] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Ju-Yan Liu
- a College of Chemistry and Life Science, Tianjin Key Laboratory of Structure and Performance for Functional Molecule , Tianjin Normal University , Tianjin, China
| | - Jing Liu
- a College of Chemistry and Life Science, Tianjin Key Laboratory of Structure and Performance for Functional Molecule , Tianjin Normal University , Tianjin, China
| | - Jia-Di Wang
- a College of Chemistry and Life Science, Tianjin Key Laboratory of Structure and Performance for Functional Molecule , Tianjin Normal University , Tianjin, China
| | - De-Quan Jiao
- a College of Chemistry and Life Science, Tianjin Key Laboratory of Structure and Performance for Functional Molecule , Tianjin Normal University , Tianjin, China
| | - Hai-Wang Liu
- a College of Chemistry and Life Science, Tianjin Key Laboratory of Structure and Performance for Functional Molecule , Tianjin Normal University , Tianjin, China
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LIU X, YIN D, ZHU H, SHEN G. Probe Reactions Catalyzed by Surface Acid Sites of HTS-1. CHINESE JOURNAL OF CATALYSIS 2010. [DOI: 10.3724/sp.j.1088.2010.90516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Amberlyst-15: a mild, efficient and reusable heterogeneous catalyst for N-tert-butoxycarbonylation of amines. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.09.018] [Citation(s) in RCA: 35] [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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20
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Liu YH, Liu QS, Zhang ZH. Amberlyst-15 as a new and reusable catalyst for regioselective ring-opening reactions of epoxides to β-alkoxy alcohols. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.molcata.2008.09.003] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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