Cu doped CdS nanoparticles: A versatile and recoverable catalyst for chemoselective synthesis of indolo[2,3- b ]quinoxaline derivatives under microwave irradiation

Dandia, Anshu; Parewa, Vijay; Maheshwari, Shuchi; Rathore, Kuldeep S.

doi:10.1016/j.molcata.2014.07.022

Cited by 24 publications

(6 citation statements)

References 55 publications

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“…The coupling of nanocatalyst with aqueous medium and MWs can offer an astonishing synergistic effect with superior potential than these components in solitude [24]. In continuation of our efforts towards the development of newer nanocatalytic processes [25][26][27], herein, we wish to report the synthesis of magnetically recoverable Fe 3 …”

Section: Accepted Manuscriptmentioning

confidence: 99%

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Microwave-assisted Fe3O4 nanoparticles catalyzed synthesis of chromeno[1,6]naphthyridines in aqueous media

Dandia

Parewa

Gupta

et al. 2015

Catalysis Communications

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Section: Accepted Manuscriptmentioning

confidence: 99%

“…It suggested that temperature of nanoparticles was much higher than the average temperature measured. Thus, nanocatalysts can act as a susceptor [24,26,35] and serve as an internal heating source for the reaction by transferring heat to the reactants and prevent their own deactivation.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Microwave-assisted Fe3O4 nanoparticles catalyzed synthesis of chromeno[1,6]naphthyridines in aqueous media

Dandia

Parewa

Gupta

et al. 2015

Catalysis Communications

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“…Therefore, further development of the new synthetic protocol will require that can selectively actuate the chemical reactions with high reactivity and selectivity with less hazardous impact. Hence, arbitrating the rationale behind the development of a versatile and sustainable methodology using aqueous media, herein we demonstrate metal and catalyst free aqueous mediated chemoselective synthesis of pyranopyrazoles via the reaction of 3‐methyl‐1‐phenyl‐1 H ‐pyrazol‐5(4 H )‐one 1 with benzyl alcohols 2 through hydrogen bond mediated ‘electrophile– nucleophile dual activation’ aptitude of water (Scheme ). This paper reports superior protocol using alcohols as more benign and easily accessible starting material than aldehydes.…”

Section: Introductionmentioning

confidence: 99%

Water‐Triggered Metal‐Free Synthesis of Pyranopyrazoles via One‐Pot Oxidation/Michael Addition/Cyclization/Dehydration Sequence.

et al. 2018

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An “all water” strategy for the catalyst free chemo‐selective synthesis of pyranopyrazoles via the reaction of 3‐methyl‐1‐phenyl‐1H‐pyrazol‐5(4H)‐one with benzyl alcohols has been developed. Water actuates the reaction via ‘electrophile– nucleophile dual activation’ of the reactants through the concerted hydrogen bonding network and impel the reactants for C−C bond formation. Reaction proceeds by metal and catalyst free oxidation–Michael addition–cyclization–dehydration sequence. This method gave pyrano[2, 3‐c:6,5‐c′]dipyrazol]‐2‐ones selectivity over other possible products. Furthermore, this method is also applied on the reaction of the benzyl alcohols and dimedone to give arylmethylene[bis(5,5‐dimethyl‐3‐hydroxy‐2‐cyclohexene‐1‐ones)] in good to excellent yields.

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“…CdS nanoparticles possess special properties that can be brought about by adding metal impurities such as silver 6–10. Ziabar and Ghodsi 11 studied growth and properties of nanocrystalline cadmium sulfide thin films synthesized by the sol‐gel method using polyethylene glycol media.…”

Section: Introductionmentioning

confidence: 99%

Band Gap Energies and Photocatalytic Properties of CdS and Ag/CdS Nanoparticles for Azo Dye Degradation

2015

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CdS nanoparticles were synthesized by the ultrasonic-assisted sol-gel method and characterized by X-ray diffraction (XRD). The Ag-doped CdS (Ag/CdS) nanoparticles were also synthesized by the ultrasonic-assisted sol-gel method and characterized by XRD, X-ray fluorescence spectrometry, scanning electron microscopy, and energy-dispersive X-ray analysis. The calculated sizes and experimental results are in good agreement. The calculated band-gaps of CdS and Ag/CdS were found to be 2.62 and 2.46 eV, respectively. Photocatalytic degradation of Direct Red 264 azo dye was investigated with CdS and Ag/CdS under UV-C and visible light irradiation. Experimental results indicate that the degradation rate of DR 264 follows pseudo second-order kinetics. Also, the intraparticle diffusion coefficients of CdS and Ag/CdS were determined.

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Cu doped CdS nanoparticles: A versatile and recoverable catalyst for chemoselective synthesis of indolo[2,3- b ]quinoxaline derivatives under microwave irradiation

Cited by 24 publications

References 55 publications

Microwave-assisted Fe3O4 nanoparticles catalyzed synthesis of chromeno[1,6]naphthyridines in aqueous media

Microwave-assisted Fe3O4 nanoparticles catalyzed synthesis of chromeno[1,6]naphthyridines in aqueous media

Water‐Triggered Metal‐Free Synthesis of Pyranopyrazoles via One‐Pot Oxidation/Michael Addition/Cyclization/Dehydration Sequence.

Band Gap Energies and Photocatalytic Properties of CdS and Ag/CdS Nanoparticles for Azo Dye Degradation

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