1
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Nagarajan S, Fazlur-Rahman NK. Mn-Catalyzed Ligand-Free One-Pot Synthesis of ( E)-6,7-Dihydrodibenzo[ b, j][1,7]phenanthrolines and ( E)-1,2,3,4-Tetrahydrobenzo[ b][1,6]naphthyridines through Dehydrogenative Friedlander Annulation/C(sp 3)-H Functionalization. ACS OMEGA 2024; 9:24464-24476. [PMID: 38882093 PMCID: PMC11170762 DOI: 10.1021/acsomega.4c00188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 04/25/2024] [Accepted: 04/29/2024] [Indexed: 06/18/2024]
Abstract
An efficient, MnO2-catalyzed ligand-free synthesis of (E)-6,7-dihydrodibenzo[b,j][1,7]phenanthrolines, 13, and (E)-1,2,3,4-tetrahydrobenzo[b][1,6]naphthyridines, 15, utilizing, 2-amino-5-chloro-benzhydrol, 9, acridinol, 10, or 1-benzyl-4-piperidinol, 14, and benzyl alcohols, 11, is reported. The MnO2-catalyzed dehydrogenative Friedlander annulation utilizing ChCl/p-TSA (DES-1) and subsequent C(sp3)-H functionalization with TBAB/p-TSA (DES-2) was effected at 100 °C. The optimized reaction conditions gave excellent product yields, and the products were evaluated for their by UV absorption and fluorescence emission studies.
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Affiliation(s)
- Sambavi Nagarajan
- Organic and Medicinal Chemistry Research Laboratory, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India
| | - Nawaz Khan Fazlur-Rahman
- Organic and Medicinal Chemistry Research Laboratory, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India
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2
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Pari K, Fazlur-Rahman NK. Copper-catalyzed dehydrogenative cyclization/alkenylation towards dihydroquinolinones. Org Biomol Chem 2024; 22:4163-4171. [PMID: 38716564 DOI: 10.1039/d4ob00134f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/23/2024]
Abstract
An efficient copper-catalyzed one-pot sequential synthesis of alkenylated quinolinyl dihydroquinolinones is reported, utilizing ketones, 1,3-cyclohexanediones, and benzyl alcohols via dehydrogenative cyclization, followed by alkenylation. This highly straightforward method provides a mild and environmentally friendly approach, and scalable reactions are carried out without generating side products. Furthermore, a plausible reaction mechanism is proposed based on control-experiment studies and reaction monitoring via1H NMR analysis. In addition, the photophysical behavior of the synthesized products showed various responses in the absorption and emission spectra. Upon further examination, compound 4F was found to have acidochromic properties, leading to noticeable colour changes.
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Affiliation(s)
- Keerthana Pari
- Organic and Medicinal Chemistry Research Laboratory, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632 014, Tamil Nadu, India.
| | - Nawaz Khan Fazlur-Rahman
- Organic and Medicinal Chemistry Research Laboratory, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632 014, Tamil Nadu, India.
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3
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Shirisha T, Majhi S, Divakar K, Kashinath D. Metal-free synthesis of functionalized tacrine derivatives and their evaluation for acetyl/butyrylcholinesterase and α-glucosidase inhibition. Org Biomol Chem 2024; 22:790-804. [PMID: 38167698 DOI: 10.1039/d3ob01760e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
A mild and greener protocol was developed for C-C (C(sp3)-H functionalization) and C-N bond formation to synthesize functionalized tacrine derivatives using a biodegradable and reusable deep eutectic solvent [(DES) formed from N,N'-dimethyl urea and L-(+)-tartaric acid in a 3 : 1 ratio at 80 °C]. The condensation of 9-chloro-1,2,3,4-tetrahydroacridines with a variety of aromatic aldehydes gave unsaturated compounds via C(sp3)-H functionalization (at the C-4 position) with good yields. The substituted N-aryl tacrine derivatives were obtained from the condensed products of 9-chloro-1,2,3,4-tetrahydroacridine with substituted anilines via the nucleophilic substitution reaction (SN2 type) in the DES with good yields. This is the first example of C4-functionalized tacrine derivatives, highlighting the dual capacity of the DES to serve as both a catalyst and a solvent for facilitating C-N bond formation on acridine. The generated compounds were evaluated for acetyl/butyrylcholinesterase (AChE/BChE) and α-glucosidase inhibitory activity. It was found that the majority of the compounds reported here were significantly more potent inhibitors than the standard inhibitor tacrine (AChE IC50 = 203.51 nM; BChE IC50 = 204.01 nM). Among the compounds screened, 8m was found to be more potent with IC50 = 125.06 nM and 119.68 nM towards AChE and BChE inhibition respectively. The α-glucosidase inhibitory activity of the compounds was tested using acarbose as a standard drug (IC50 = 23 100 nM) and compound 8j was found to be active with IC50 = 19 400 nM.
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Affiliation(s)
| | - Subir Majhi
- Department of Chemistry, National Institute of Technology, Warangal-506 004, India.
| | - Kalivarathan Divakar
- Department of Biotechnology, Sri Venkateswara College of Engineering (Autonomous), Sriperumbudur, Tamilnadu-602 117, India.
| | - Dhurke Kashinath
- Department of Chemistry, National Institute of Technology, Warangal-506 004, India.
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4
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Wagay SA, Ali R. Unraveling the Potential Role of Deep Eutectic Solvents (DESs): Synthesis of Ketazines & Pyrazolines. ChemistrySelect 2023. [DOI: 10.1002/slct.202202779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Shafieq Ahmad Wagay
- Organic and Supramolecular Functional Materials Research Laboratory Department of Chemistry, Jamia Millia Islamia, Okhla New Delhi 110025 India
| | - Rashid Ali
- Organic and Supramolecular Functional Materials Research Laboratory Department of Chemistry, Jamia Millia Islamia, Okhla New Delhi 110025 India
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5
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Rather I, Alotaibi SH, Alotaibi MT, Altaf M, Ali R. Deep Eutectic Solvent (DES)-Mediated One-Pot Multicomponent Green Approach for Naphthalimide-Centered Acridine-1,8-dione Derivatives and Their Photophysical Properties. ACS OMEGA 2022; 7:35825-35833. [PMID: 36249394 PMCID: PMC9558244 DOI: 10.1021/acsomega.2c04026] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 09/09/2022] [Indexed: 06/16/2023]
Abstract
An efficient and green methodology to assemble various functionalized naphthalimide-centered acridine-1,8-dione derivatives involving a one-pot multicomponent protocol has successfully been developed. Herein, a variety of aromatic aldehydes, 1,3-diketones, 1,8-naphthanoic anhydride, and hydrazine hydrate have been condensed under a reusable, inexpensive, and biodegradable deep eutectic solvent (DES) of N,N'-dimethyl urea and l-(+)-tartaric acid to obtain the desired targets under operationally mild reaction conditions with outstanding conversions. Strikingly, in this strategy, the DES plays a dual role of a catalyst and solvent and was recycled efficiently in four consecutive runs with no substantial drop in the yield of the desired product. Interestingly, the easy recovery and high reusability of the DES make this simple yet efficient protocol environmentally desirable. Moreover, the preliminary photophysical properties of thus-prepared valuable molecules have also been investigated by ultraviolet-visible (UV-vis) and fluorescence spectroscopy.
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Affiliation(s)
- Ishfaq
Ahmad Rather
- Organic
and Supramolecular Functional Materials Research Laboratory, Department
of Chemistry, Jamia Millia Islamia, Jamia Nagar, Okhla, New Delhi 110025, India
| | - Saad H. Alotaibi
- Department
of Chemistry, Turabah University College,
Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Mohammed T. Alotaibi
- Department
of Chemistry, Turabah University College,
Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Mohammad Altaf
- Department
of Chemistry, College of Science, King Saud
University, P.O. Box 24555, Riyadh 11451, Saudi Arabia
| | - Rashid Ali
- Organic
and Supramolecular Functional Materials Research Laboratory, Department
of Chemistry, Jamia Millia Islamia, Jamia Nagar, Okhla, New Delhi 110025, India
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6
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An efficient low melting mixture mediated green approach for the synthesis of 2-substituted benzothiazoles and benzimidazoles. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100338] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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7
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Teja C, Garg A, Rohith G, Roshini H, Jena S, Nawaz Khan FR. Diversity Oriented Synthesis of Oxygen-Heterocycles, Warfarin Analogs Utilizing Microwave-Assisted Dimethyl Urea-Based Deep Eutectic Solvents. Polycycl Aromat Compd 2021. [DOI: 10.1080/10406638.2021.1912123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Chitrala Teja
- Organic and Medicinal Chemistry Research Laboratory, Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu, India
| | - Ashna Garg
- Organic and Medicinal Chemistry Research Laboratory, Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu, India
| | - G.K. Rohith
- Organic and Medicinal Chemistry Research Laboratory, Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu, India
| | - Hanumanthu Roshini
- Organic and Medicinal Chemistry Research Laboratory, Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu, India
| | - Sushovan Jena
- Organic and Medicinal Chemistry Research Laboratory, Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu, India
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8
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Ali R, Chinnam AK, Aswar VR. The Double and Triple Role of L-(+)-tartaric Acid and Dimethyl Urea: A Prevailing Green Approach in Organic Synthesis. CURR ORG CHEM 2021. [DOI: 10.2174/1385272825666210111111313] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The deep eutectic mixtures (DESs), introduced as a novel alternative to usual volatile
organic solvents for organic transformations, have attracted tremendous attention of the
research community because of their low cost, negligible vapour pressure, low toxicity, biodegradability,
recyclability, insensitivity towards moisture, and ready availability from bulk
renewable resources. Although the low melting mixture of dimethyl urea (DMU)/L-(+)-
tartaric acid (TA) is still in infancy, it is very effective as it plays multiple roles such as solvent,
catalyst and/or reagent in the same pot for many crucial organic transformations. These
unique properties of the DMU/TA mixture prompted us to provide a quick overview of where
the field stands presently and where it might be going in the near future. To our best knowledge,
no review dealing with the applications of a low melting mixture of DMU/TA appeared
in the literature except the one published in 2017, describing only the chemistry of indole systems. Therefore, we
intended to reveal the developments of this versatile, low melting mixture in the modern organic synthesis since its
first report in 2011 by Köenig’s team to date. Hopefully, the present review article will be useful to the researcher
working not only in the arena of synthetic organic chemistry but also to the scientists working in other branches of
science and technology.
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Affiliation(s)
- Rashid Ali
- Department of Chemistry, Jamia Millia Islamia, New Delhi-110025, India
| | - Ajay Kumar Chinnam
- Department of Chemistry, University of Idaho, Moscow, Idaho, 83844-2343, United States
| | - Vikas R. Aswar
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
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9
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Sathish K, Nagaraju S, Kashinath D. Dimethylurea/L-tartaric acid as deep eutectic solvent for one-pot synthesis of 2-(methylamino)-3-nitrospiro-[chromene] and N-methyl-3-nitro-4 H chromen-2-amines. SYNTHETIC COMMUN 2021. [DOI: 10.1080/00397911.2021.1878225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Kota Sathish
- Department of Chemistry, National Institute of Technology, Warangal, India
| | - Sakkani Nagaraju
- Department of Chemistry, National Institute of Technology, Warangal, India
| | - Dhurke Kashinath
- Department of Chemistry, National Institute of Technology, Warangal, India
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10
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Pavithra D, Ethiraj KR, Nawaz Khan F. Cu‐TEMPO Catalyzed Dehydrogenative Friedlander Annulation/sp
3
C–H Functionalization/Spiroannulation towards Spiro[indoline‐3,3'‐pyrrolizin]‐2'‐yl)‐4‐phenylquinoline‐3‐Carboxylates. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001109] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Dalavai Pavithra
- Organic and Medicinal Chemistry Research Laboratory School of Advanced Sciences Vellore Institute of Technology 632014 Vellore Tamil Nadu India
| | - Kannat Radhakrishnan Ethiraj
- Organic and Medicinal Chemistry Research Laboratory School of Advanced Sciences Vellore Institute of Technology 632014 Vellore Tamil Nadu India
| | - Fazlur‐Rahman Nawaz Khan
- Organic and Medicinal Chemistry Research Laboratory School of Advanced Sciences Vellore Institute of Technology 632014 Vellore Tamil Nadu India
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11
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Hu Z, Xie Z, Zhu Z, Gong B, Jiang G, Le Z. Synthesis of Mannich-type derivatives from amides activated by hydrogen bonding with ZnCl 2. Org Biomol Chem 2020; 18:9095-9099. [PMID: 33146660 DOI: 10.1039/d0ob01989e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The amide group has one of the most significant functionalities found in many natural products. Herein, low-nucleophilic amides are used in a Mannich-type reaction to synthesize N-acyl-protected amine derivatives. A highly efficient synthetic method utilizing simple aldehydes, N-substituted anilines, and amides as substrates was established through a one-pot amide pathway activated by hydrogen bonding between the ZnCl2 and amide under solvent-free conditions. This strategy can be broadly applied to medicinal chemistry. More importantly, compared with the previous Lewis acid catalyzed reaction, we proposed a new application of zinc chloride.
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Affiliation(s)
- Zhiyu Hu
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, Jiangxi, China. and School of Chemistry, Biology and Material Science, East China University of Technology, Nanchang 330013, Jiangxi, China.
| | - Zongbo Xie
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, Jiangxi, China. and School of Chemistry, Biology and Material Science, East China University of Technology, Nanchang 330013, Jiangxi, China.
| | - Zhiqiang Zhu
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, Jiangxi, China. and School of Chemistry, Biology and Material Science, East China University of Technology, Nanchang 330013, Jiangxi, China.
| | - Bozhen Gong
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, Jiangxi, China. and School of Chemistry, Biology and Material Science, East China University of Technology, Nanchang 330013, Jiangxi, China.
| | - Guofang Jiang
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, Jiangxi, China. and School of Chemistry, Biology and Material Science, East China University of Technology, Nanchang 330013, Jiangxi, China.
| | - Zhanggao Le
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, Jiangxi, China. and School of Chemistry, Biology and Material Science, East China University of Technology, Nanchang 330013, Jiangxi, China.
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12
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Teja C, Nawaz Khan FR. Choline Chloride-Based Deep Eutectic Systems in Sequential Friedländer Reaction and Palladium-Catalyzed sp 3 CH Functionalization of Methyl Ketones. ACS OMEGA 2019; 4:8046-8055. [PMID: 31459894 PMCID: PMC6648676 DOI: 10.1021/acsomega.9b00310] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Accepted: 04/16/2019] [Indexed: 06/10/2023]
Abstract
A volatile organic solvent-free and choline chloride (ChCl)-based deep eutectic system (DES)-mediated sp3-CH functionalization of acetophenones 1 with benzyl alcohols 2 to the corresponding α, β-saturated ketones 3 is accounted for. The domino dehydrogenation-aldol condensation (hydrogenation borrowing concept) has been successfully attempted with palladium-tetrakis(triphenylphosphine) [Pd(PPh3)4] catalyst-xantphos ligand combination. Furthermore, a sequential Friedländer reaction of 2-aminobenzophenone 4 and palladium-catalyzed α-alkylation of the quinolinyl methyl ketone with benzyl alcohols 2 in ChCl-based DES have been successfully investigated. The C-C bond formation through sp3-CH functionalization involves a wide scope of the substrates, high atom efficiency, chemoselectivity, and environmentally friendly strategy.
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13
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Shaibuna M, Theresa LV, Sreekumar K. A New Green and Efficient Brønsted: Lewis Acidic DES for Pyrrole Synthesis. Catal Letters 2018. [DOI: 10.1007/s10562-018-2414-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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14
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Shaabani A, Hooshmand SE, Afaridoun H. A green chemical approach: a straightforward one-pot synthesis of 2-aminothiophene derivatives via Gewald reaction in deep eutectic solvents. MONATSHEFTE FUR CHEMIE 2016. [DOI: 10.1007/s00706-016-1787-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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15
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Alonso DA, Baeza A, Chinchilla R, Guillena G, Pastor IM, Ramón DJ. Deep Eutectic Solvents: The Organic Reaction Medium of the Century. European J Org Chem 2016. [DOI: 10.1002/ejoc.201501197] [Citation(s) in RCA: 421] [Impact Index Per Article: 52.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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16
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D’Agostino C, Gladden LF, Mantle MD, Abbott AP, Ahmed EI, Al-Murshedi AYM, Harris RC. Molecular and ionic diffusion in aqueous – deep eutectic solvent mixtures: probing inter-molecular interactions using PFG NMR. Phys Chem Chem Phys 2015; 17:15297-15304. [DOI: 10.1039/c5cp01493j] [Citation(s) in RCA: 168] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Diffusional studies in deep eutectic solvent–water mixtures suggest that in many cases the fluids do not act as homogeneous mixtures and there is a complex behaviour between the cation, hydrogen bond donor and water.
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Affiliation(s)
- Carmine D’Agostino
- Department of Chemical Engineering and Biotechnology
- University of Cambridge
- Cambridge CB2 3RA
- UK
| | - Lynn F. Gladden
- Department of Chemical Engineering and Biotechnology
- University of Cambridge
- Cambridge CB2 3RA
- UK
| | - Mick D. Mantle
- Department of Chemical Engineering and Biotechnology
- University of Cambridge
- Cambridge CB2 3RA
- UK
| | - Andrew P. Abbott
- Department of Chemistry
- University of Leicester
- Leicester LE1 7RH
- UK
| | - Essa, I. Ahmed
- Department of Chemistry
- University of Leicester
- Leicester LE1 7RH
- UK
| | | | - Robert C. Harris
- Department of Chemistry
- University of Leicester
- Leicester LE1 7RH
- UK
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17
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Liu P, Hao JW, Mo LP, Zhang ZH. Recent advances in the application of deep eutectic solvents as sustainable media as well as catalysts in organic reactions. RSC Adv 2015. [DOI: 10.1039/c5ra05746a] [Citation(s) in RCA: 420] [Impact Index Per Article: 46.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
This review highlights the recent advances using deep eutectic solvents (DESs), deep eutectic ionic liquids (DEILs), low-melting mixtures (LMMs) or low transition temperature mixtures (LTTMs) as green media as well as catalysts in organic reactions.
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Affiliation(s)
- Peng Liu
- College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang 050024
- P. R. China
| | - Jian-Wu Hao
- College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang 050024
- P. R. China
| | - Li-Ping Mo
- College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang 050024
- P. R. China
| | - Zhan-Hui Zhang
- College of Chemistry and Material Science
- Hebei Normal University
- Shijiazhuang 050024
- P. R. China
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