A New Facile Ultrasound-Assisted Magnetic Nano-[CoFe2O4]-Catalyzed One-Pot Synthesis of Pyrano[2,3-c]pyrazoles

Mishra, Manisha; Nizam, Aatika; Jomon, K. J.; Tadaparthi, K.

doi:10.1134/s1070428019120194

Cited by 12 publications

(9 citation statements)

References 9 publications

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“…Furthermore, the nano-film catalyst was stable and able to be reused ten times with sustained activity. Uderji et al [81] reported a new, high-surface-area (509.5 m 2 /g) mesoporous catalyst (Fe 3 O 4 @FSM-16-SO 3 H) for the preparation of novel dihydropyrano-[2,3-c]-pyrazole scaffolds (83). FESEM study showed that the nanoparticles had a spherical morphology with size < 100 nm.…”

Section: With Bi-metallic Catalystsmentioning

confidence: 99%

“…A new protocol for the synthesis of pyranopyrazole scaffolds (87) with nanomagnetic iron material [CoFe 2 O 4 ] as a reusable catalyst in aqueous solvent was described by Mishra and co-workers [83]. The one-pot approach, in the presence of a catalyst (0.05 g), involved malononitrile (3), hydrazine hydrate (11), ethyl acetoacetate (12) and substituted aldehydes (86), and used ultrasound irradiation for 5 min (Scheme 25).…”

Section: With Bi-metallic Catalystsmentioning

confidence: 99%

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Advances in Pyranopyrazole Scaffolds’ Syntheses Using Sustainable Catalysts—A Review

et al. 2021

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Heterogeneous catalysis plays a crucial role in many chemical processes, including advanced organic preparations and the design and synthesis of new organic moieties. Efficient and sustainable catalysts are vital to ecological and fiscal viability. This is why green multicomponent reaction (MCR) approaches have gained prominence. Owing to a broad range of pharmacological applications, pyranopyrazole syntheses (through the one-pot strategy, employing sustainable heterogeneous catalysts) have received immense attention. This review aimed to emphasise recent developments in synthesising nitrogen-based fused heterocyclic ring frameworks, exploring diverse recyclable catalysts. The article focused on the synthetic protocols used between 2010 and 2020 using different single, bi- and tri-metallic materials and nanocomposites as reusable catalysts. This review designated the catalysts’ efficacy and activity in product yields, reaction time, and reusability. The MCR green methodologies (in conjunction with recyclable catalyst materials) proved eco-friendly and ideal, with a broad scope that could feasibly lead to advancements in organic synthesis.

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Section: With Bi-metallic Catalystsmentioning

confidence: 99%

Section: With Bi-metallic Catalystsmentioning

confidence: 99%

Advances in Pyranopyrazole Scaffolds’ Syntheses Using Sustainable Catalysts—A Review

et al. 2021

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“…M. Mishraa et al [64] . demonstrate one‐pot synthesis of magnetic nano‐[CoFe 2 O 4 ]‐catalyzed pyrano [2, 3‐c] pyrazoles (48) via ultrasound waves.…”

Section: All Green Approaches For Pyrazole Synthesismentioning

confidence: 99%

“…M. Mishraa et al [64] demonstrate one-pot synthesis of magnetic nano- Anshu Dandia et al [65] carried out ultrasound assisted green synthesis of spiro[pyrano [2,3- Jorge Trilleras et al [66] synthesize ultrasonics assisted synthesis of 5-(pyrazol-4-yl)-4, 5-dihydropyrazoles (50) derivatives. Synthesis is done by using chalcones and hydrazines in ethanol or methanol or acetic acid under sonication at ambient conditions in 20 min.…”

Section: Ultrasound Assisted Synthesismentioning

confidence: 99%

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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“…Later in 2017 Abaszadeh and Mohammad synthesized 1,4-dihydropyridines and tetrahydro-4H-chromenes using some CECILs 13 . In continuation of our work on the development of new and simple catalyst for the synthesis of bioactive compounds [14][15][16][17] , also taking inspiration from K Nikoofar's work on the preparation of Spiro[indoline-3,2′-quinoline] substrates using [DB-18-C-6K + ][OH − ]nIL 18 and noting the fact that very little is explored in this, herein we report the in-situ generation of crown ether hydronium ion complex ([18-C-6H 3 O + ][OH − ]) and it's catalytic activity in four-component synthesis of pypys under sonication (Fig. 1).…”

Section: Synthesis Of Small Aromatic Heterocycles Is Of Greater Impormentioning

confidence: 99%

[18-C-6H3O+]: an in-situ generated macrocyclic complex and an efficient, novel catalyst for synthesis of pyrano[2,3-c]pyrazole derivatives

Mishra

Jomon

Krishnan

et al. 2020

Sci Rep

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General procedure for the synthesis of pyrano[2,3-c]pyrazoles using crown ether as a catalyst. To a mixture of aromatic aldehyde 1a-p (2 mmol), 2 (2 mmol), 3 (2 mmol), 4a/4b (2 mmol) in water (10 mL) taken in a 50 mL RB flask, crown ether 10 mol% was added. The reaction mixture was subjected to sonication for 10 min at room temperature. The completion of reaction was confirmed using TLC. The solid product was filtered and recrystallized from aqueous ethanol to get the pure products.

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A New Facile Ultrasound-Assisted Magnetic Nano-[CoFe2O4]-Catalyzed One-Pot Synthesis of Pyrano[2,3-c]pyrazoles

Cited by 12 publications

References 9 publications

Advances in Pyranopyrazole Scaffolds’ Syntheses Using Sustainable Catalysts—A Review

Advances in Pyranopyrazole Scaffolds’ Syntheses Using Sustainable Catalysts—A Review

Greener and Environmentally Benign Methodology for the Synthesis of Pyrazole Derivatives

[18-C-6H3O+]: an in-situ generated macrocyclic complex and an efficient, novel catalyst for synthesis of pyrano[2,3-c]pyrazole derivatives

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