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Kareem NS, Mohammed SA, Abed MJ, Aneed AH, Kamal HM, Zahid NI, Sabah KJ. New macrocycles incorporating glycolipids via copper-catalyzed triazole coupling. J Carbohydr Chem 2022. [DOI: 10.1080/07328303.2022.2039685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Nuha S. Kareem
- Department of Chemistry, Faculty of Science, University of Kufa, An-Najaf, Iraq
| | - Shaymaa A. Mohammed
- Department of Chemistry, Faculty of Science, University of Kufa, An-Najaf, Iraq
- Department of Chemistry, Faculty of Science, University of Muthana, Al-Samawa, Iraq
| | - May Jaleel Abed
- Department of Chemistry, Faculty of Science, University of Kufa, An-Najaf, Iraq
- Department of Biochemistry, Faculty of Medicine, University of Al-Qadisiyah, Al-Qadisiayah, Iraq
| | - Asaad H. Aneed
- Department of Chemistry, Faculty of Science, University of Kufa, An-Najaf, Iraq
| | - Hayder M. Kamal
- Department of Chemistry, Faculty of Science, University of Kufa, An-Najaf, Iraq
| | - N. Idayu Zahid
- Centre for Fundamental and Frontier Sciences in Nanostructure Self-Assembly, Department of Chemistry, Faculty of Science, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Karem J. Sabah
- Department of Chemistry, Faculty of Science, University of Kufa, An-Najaf, Iraq
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Orbán I, Varga B, Bagi P, Hegedűs L, Bakó P, Rapi Z. Synthesis of Methyl 4,6-Di- O-ethyl-α-d-glucopyranoside-Based Azacrown Ethers and Their Effects in Asymmetric Reactions. Molecules 2021; 26:4668. [PMID: 34361821 PMCID: PMC8348128 DOI: 10.3390/molecules26154668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 07/25/2021] [Accepted: 07/29/2021] [Indexed: 12/01/2022] Open
Abstract
Carbohydrate-based crown ethers have been reported to be able to generate asymmetric induction in certain reactions. Previously, it was proved that the monosaccharide unit, the anomeric substituent, and the sidearm could influence the catalytic activity of the monoaza-15-crown-5 macrocycles derived from sugars. In order to gain information about the effect of the flexibility, 4,6-di-O-ethyl-glucoside-based crown compounds were synthesized, and their efficiency was compared to the 4,6-O-benzylidene analogues. It was found that the absence of the two-ring annulation has a negative effect on the enantioselectivity in liquid-liquid two-phase reactions: in the Darzens condensation of 2-chloroacetophenone and in the epoxidation of chalcone. The same trend was observed in the solid-liquid phase Michael addition of diethyl acetamidomalonate. Surprisingly, in the solid-liquid phase cyclopropanation of benzylidenemalononitrile, one of the new catalysts was highly enantioselective (99% ee).
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Affiliation(s)
| | | | | | | | | | - Zsolt Rapi
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, H-1111 Budapest, Hungary; (I.O.); (B.V.); (P.B.); (L.H.); (P.B.)
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Abstract
Carbohydrate-based crown ethers represent a special group of chiral phase transfer catalysts. Several derivatives of these macrocycles have been synthesized in our research group. Among these compounds, monoaza-15-crown-5 lariat ethers proved to be effective phase transfer and enantioselective catalysts in certain reactions. Those chiral azacrown ethers incorporating various carbohydrate moieties in the macrocyclic structure are reviewed, which generated asymmetric induction in reactions, such as Michael addition, epoxidation of enones, Darzens condensation and Michael-initiated ring-closure (MIRC) reaction. Effects on the catalytic activity of the structural changes are the focus.
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Sabah KJ, Zahid NI, Hashim R. Synthesis of new chiral macrocycles-based glycolipids and its application in asymmetric Michael addition. RESEARCH ON CHEMICAL INTERMEDIATES 2021. [DOI: 10.1007/s11164-021-04432-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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5
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Novel polymer crafted sugar thiacrown ether and its applications in recovery of metal ions. Carbohydr Res 2020; 495:108057. [DOI: 10.1016/j.carres.2020.108057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 05/22/2020] [Accepted: 06/01/2020] [Indexed: 11/22/2022]
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Abstract
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Many catalysts were tested in asymmetric Michael additions in order to synthesize
enantioenriched products. One of the most common reaction types among the Michael
reactions is the conjugated addition of malonates to enones making it possible to investigate
the structure–activity relationship of the catalysts. The most commonly used Michael
acceptors are chalcone, substituted chalcones, chalcone derivatives, cyclic enones,
while typical donors may be dimethyl, diethyl, dipropyl, diisopropyl, dibutyl, di-tert-butyl
and dibenzyl malonates. This review summarizes the most important enantioselective
catalysts applied in these types of reactions.
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Affiliation(s)
- Péter Bakó
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, PO Box 91, 1521 Budapest, Hungary
| | - Tamás Nemcsok
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, PO Box 91, 1521 Budapest, Hungary
| | - Zsolt Rapi
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, PO Box 91, 1521 Budapest, Hungary
| | - György Keglevich
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, PO Box 91, 1521 Budapest, Hungary
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A novel approach for the selective extraction of Li+ from the leaching solution of spent lithium-ion batteries using benzo-15-crown-5 ether as extractant. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2019.116325] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Nemcsok T, Rapi Z, Bagi P, Oláh A, Keglevich G, Bakó P. The Synthesis of Hydrobenzoin-Based Monoaza Crown Ethers and Their Application as Recyclable Enantioselective Catalysts. Catal Letters 2020. [DOI: 10.1007/s10562-019-03013-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Abstract
New recyclable monoaza-15-crown ethers have been synthesized starting from (R,R)-(+)- and (S,S)-(−)-hydrobenzoin. These macrocycles proved to be efficient and reusable phase transfer catalysts in a few asymmetric reactions under mild conditions. The asymmetric epoxidation of trans-chalcone took place with up to 81% ee, while using other chalcone derivatives, the products were formed with 68–88% ee. The hydrobenzoin-based lariat ethers were also tested in the cyclopropanation of a few electron deficient olefins using diethyl bromomalonate to afford the product with good enantioselectivities (54–75% ee). The catalysts were recovered by salt formation, followed by extraction, and were reused without the loss of the activity and effect on the enantioselectivity.
Graphic Abstract
The synthesis of hydrobenzoin-based monaza crown ethers and their application as recyclable enantioselective catalysts.
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Nemcsok T, Rapi Z, Bagi P, Keglevich G, Bakó P. Synthesis of xylal‐ and arabinal‐based crown ethers and their application as asymmetric phase transfer catalysts. Chirality 2019; 32:107-119. [DOI: 10.1002/chir.23149] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 08/28/2019] [Accepted: 10/08/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Tamás Nemcsok
- Department of Organic Chemistry and TechnologyBudapest University of Technology and Economics Budapest Hungary
| | - Zsolt Rapi
- Department of Organic Chemistry and TechnologyBudapest University of Technology and Economics Budapest Hungary
| | - Péter Bagi
- Department of Organic Chemistry and TechnologyBudapest University of Technology and Economics Budapest Hungary
| | - György Keglevich
- Department of Organic Chemistry and TechnologyBudapest University of Technology and Economics Budapest Hungary
| | - Péter Bakó
- Department of Organic Chemistry and TechnologyBudapest University of Technology and Economics Budapest Hungary
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Yarrowia lipolytica: more than an oleaginous workhorse. Appl Microbiol Biotechnol 2019; 103:9251-9262. [DOI: 10.1007/s00253-019-10200-x] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 10/07/2019] [Accepted: 10/15/2019] [Indexed: 02/07/2023]
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Nemcsok T, Rapi Z, Bagi P, Bakó P. Synthesis and application of novel carbohydrate-based ammonium and triazolium salts. SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1625403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Tamás Nemcsok
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Zsolt Rapi
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Péter Bagi
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Péter Bakó
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
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Yao YL, Zhu MY, Zhao Z, Liu WG, Tong BH, Li MY. Density functional theory study of selectivity of crown ethers to Li+in spent lithium-ion batteries leaching solutions. CHINESE J CHEM PHYS 2019. [DOI: 10.1063/1674-0068/cjcp1809213] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Yong-lin Yao
- School of Metallurgical Engineering, Anhui University of Technology, Maanshan 243002, China
- Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Anhui University of Technology, Maanshan 243002, China
| | - Mei-ying Zhu
- School of Metallurgical Engineering, Anhui University of Technology, Maanshan 243002, China
| | - Zhuo Zhao
- School of Metallurgical Engineering, Anhui University of Technology, Maanshan 243002, China
| | - Wen-gang Liu
- School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China
| | - Bi-hai Tong
- School of Metallurgical Engineering, Anhui University of Technology, Maanshan 243002, China
| | - Ming-yang Li
- School of Metallurgical Engineering, Anhui University of Technology, Maanshan 243002, China
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Rapi Z, Nemcsok T, Grün A, Pálvölgyi Á, Samu G, Hessz D, Kubinyi M, Kállay M, Keglevich G, Bakó P. Asymmetric cyclopropanation reactions catalyzed by carbohydrate-based crown ethers. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.04.087] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Tomilov YV, Menchikov LG, Novikov RA, Ivanova OA, Trushkov IV. Methods for the synthesis of donor-acceptor cyclopropanes. RUSSIAN CHEMICAL REVIEWS 2018. [DOI: 10.1070/rcr4787] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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