Transition metal containing ionic liquid-assisted one-pot synthesis of pyrazoles at room temperature

Konwar, Manashjyoti; Elnagdy, Hanan Mohamed Fathy; Gehlot, Praveen Singh; Khupse, Nageshwar D.; Kumar, Arvind; Sarma, Diganta

doi:10.1007/s12039-019-1659-9

Cited by 12 publications

(6 citation statements)

References 78 publications

(58 reference statements)

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“…Manashjyoti Konwar et al [70] . carried out one pot synthesis of pyrazoles (54) at room temperature in ionic liquid.…”

Section: All Green Approaches For Pyrazole Synthesismentioning

confidence: 99%

“…Jitender M. Khurana et al [69] reported under solvent-free conditions efficient and green synthesis of 4H-pyrans and 4Hpyrano [ Manashjyoti Konwar et al [70] carried out one pot synthesis of pyrazoles (54) at room temperature in ionic liquid. Ionic liquid contain transition metal which is magnetic and also catalytic such ionic liquids are known as task-specific ionic liquids (TSIL).…”

Section: Green Solventmentioning

confidence: 99%

“…α-Casein, which is a green, recyclable and ecofriendly catalyst used by Jalili Milan et al [82] for synthesis of bis (pyrazol-5-ols) (68), dihydro-pyrano [2,3-c] pyrazoles (69) and spiropyranopyrazoles (70). Efficient one-pot, preparation of pyrazole-5ols from reaction between ethyl acetoacetate, hydrazine monohydrate and aromatic aldehydes.…”

Section: Green Catalystmentioning

confidence: 99%

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Greener and Environmentally Benign Methodology for the Synthesis of Pyrazole Derivatives

Sapkal¹,

Kamble²

2020

ChemistrySelect

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Pyrazole and its derivatives are one of the interesting heterocyclic compounds among the other because it has tremendous important bio-medical applications such as anticancer, antimalarial, antimicrobial, antifungal, antitubercular and antihelishmanial. Synthesis of pyrazoles by synthetic route requires harsh reaction conditions such as organic solvent, high temperature, require large time that consume more energy which increase final cost of the synthesis of pyrazoles. Therefore researchers be aware about synthesis and give more attention towards to develop a greener as well as economically favorable method for synthesis of pyrazoles such as microwave irradiation, ultra-sonication assisted, reaction at room temperature, solvent and catalyst free and use of universal solvent that is aqueous medium these techniques are environmentally friendly as well as cost effective. Therefore, these review highlights the greener methodologies for the synthesis of pyrazoles, which are good alternative for synthetic methods that sustains green principles.

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“…Manashjyoti Konwar et al [70] . carried out one pot synthesis of pyrazoles (54) at room temperature in ionic liquid.…”

Section: All Green Approaches For Pyrazole Synthesismentioning

confidence: 99%

Section: Green Solventmentioning

confidence: 99%

Section: Green Catalystmentioning

confidence: 99%

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Greener and Environmentally Benign Methodology for the Synthesis of Pyrazole Derivatives

Sapkal¹,

Kamble²

2020

ChemistrySelect

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“…PMILs are made up of a distinct group with versatile properties such as magnetic character and widely used in a various applied fields. For example, the PMILs have been used in desulfurizations [42], organic synthesis [43], microextraction [44,45], electrocatalysis [46], probe for vesicles [47], self-assembling media for surfactants [48], acidic catalysis [49,50], density measurements [51], paramagnetic polymer synthesis [52,53], microemulsion formulation [54], synthesis of chitosan supported magnetic ionic liquid based catalysis [55], CO 2 separation [56], application in analytical science [57] and other various applications [58]. Kumar et al have reported paramagnetic surface-active ionic liquids (PMSAILs), another class of PMILs.…”

Section: Introductionmentioning

confidence: 99%

Iron-Based Ionic Liquids for Magnetic Resonance Imaging Application

Gehlot¹,

Kumar²

2023

Industrial Applications of Ionic Liquids

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In the biomedical treatment, identification of diseases and their diagnosis are running with help of many biomedical techniques including imaging such as magnetic resonance imaging (MRI). MRI technique requires an identification of targeted cell or lesion area which can be achieved by contrast agent. For clinical use, T1 positive MRI contrast agents and T2 negative MRI contrast agents are being used. However, these contrast agents have several drawbacks such as toxic effect of metal centre, poor resolution, weak contrast, low intensity image and short signal for long-term in vivo measurement. Therefore, development of new contrast agents is imperative. Ionic liquids with their unique properties have been tried as novel contrasting materials. Particularly, iron-containing amino-acid-based ionic liquids or amino-acid-based paramagnetic ionic liquids (PMILs) have been reported and demonstrated as MRI contrast agents. These PMILs have shown superior features over reported contrast agents such as dual-mode contrast, biofriendly nature, involvement of non-toxic magnetic centre (Fe), stable aqueous solution, better image intensity at low concentration level and easy to synthesis. PMILs have been characterized well and studied with animal DNA using various techniques. The result revealed that animal DNA is remain safe and stable structurally up to 5 mmol.l−1. These cost-effective PMILs opened the greater opportunity in the field of contrast-based biomedical applications.

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“…11 Some PMILs have been explored for desulfurization, 12 organic synthesis, 13 micro extraction, [14][15][16] electrocatalysis, 17 probes for vesicles, 18 selfassembling media for surfactants, 19 acidic catalysis, 20 density measurement, 21 paramagnetic polymer synthesis, 22,23 microemulsion formulation, 24 chitosan-supported magnetic IL-based catalysis, 25 CO 2 separation, 26 analytical applications, 27,28 and other diverse applications. [29][30][31] Brown et al studied paramagnetic surfactants (magnetic surfactants) with symmetric [FeCl 4 ] À and asymmetric anions [FeCl 3 Br] À . 32 PMILs also have been considered for biological applications, for example, with genomic DNA to observe their interaction in the fields of pharmacokinetics and biotechnology and gain a deeper understanding of DNA preservation and stability, 33 extraction of DNA, 34 and drug delivery system.…”

Section: Introductionmentioning

confidence: 99%