Nanocrystalline magnesium oxide stabilized gold nanoparticles: an advanced nanotechnology based recyclable heterogeneous catalyst platform for the one-pot synthesis of propargylamines

Layek, Keya; Chakravarti, Rajashree; Kantam, M. Lakshmi; Maheswaran, H.; Vinu, Ajayan

doi:10.1039/c1gc15518k

Cited by 93 publications

(61 citation statements)

References 65 publications

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“…In the last decade many efforts have been done to develop new methodologies for the synthesis of propargylamines through one-pot three-component condensation reaction (A 3 ) of aldehydes, amines, and alkynes in the presence of homogeneous catalysts such as Zn salts, Cu salts, Fe salts, Ag salts, Au salts [4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of CuO nanoparticles by aqueous extract of Anthemis nobilis flowers and their catalytic activity for the A3 coupling reaction

Nasrollahzadeh

Sajadi

Rostami-Vartooni

2015

Journal of Colloid and Interface Science

121

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Section: Introductionmentioning

confidence: 99%

Green synthesis of CuO nanoparticles by aqueous extract of Anthemis nobilis flowers and their catalytic activity for the A3 coupling reaction

Nasrollahzadeh

Sajadi

Rostami-Vartooni

2015

Journal of Colloid and Interface Science

121

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“…Moreover, the peaks at 50.8°, 58.8°, and 68.18° appeared to be related to Mg (OH) 2 . This could be caused by the reaction of MO nanoparticles with the atmospheric water molecules …”

Section: Resultsmentioning

confidence: 99%

Sodium alginate/magnesium oxide nanocomposite scaffolds for bone tissue engineering

Nasri‐Nasrabadi

Kaynak

Heidarian

et al. 2018

Polymers for Advanced Techs

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A simple 2‐step method, consisting of film casting and polyvinyl alcohol leaching, is proposed to prepare magnesium oxide (MO) nanoparticle‐reinforced sodium alginate scaffolds with right properties for bone tissue engineering. The cytocompatibility of the as‐prepared scaffolds was also evaluated using the 3‐(4,5‐dimethylthiazol‐2‐yl)‐2,5‐diphenyltetrazolium‐bromide yellow tetrazole assay test, wherein chondrocyte cells had been considered as target cells. According to the results, the ensuing sodium alginate nanocomposites, containing 4‐wt% MO nanoparticles, demonstrated the highest physical and mechanical properties after leaching step. The Young modulus of sodium alginate/4‐wt% MO was improved about 44%, in comparison with that of the pure alginate sample. Furthermore, incorporating MO nanoparticles up to 4 wt% controlled the liquid uptake capacity of scaffolds vis‐à‐vis the resultant pure sodium alginate sample. Moreover, with increasing the nanoparticle content, the antibacterial properties of scaffolds enhanced, but their degradation rates under in vitro conditions tapered off. With the introduction of 3‐ and 4‐wt% MO, the average diameter of the bacterial zone of the scaffold samples reduced to less than 10 mm2, suggesting an insensitive antimicrobial performance, compared with the pure sodium alginate and the samples with 1‐ and 2‐wt% MO content, which exhibit antimicrobial sensitivity. 3‐(4,5‐Dimethylthiazol‐2‐yl)‐2,5‐diphenyltetrazolium‐bromide assay test also revealed the cultivated chondrocyte cells on the 4‐wt% MO nanoparticle‐reinforced scaffold possessed better interaction as well as appropriate cell attachment and proliferation than the pristine sodium alginate sample.

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“…Despite the high efficiency of the reported catalysts, in many cases high catalyst loading and the expensive price of gold considerably limit the versatility of these catalytic systems. Along this line, recently, different heterogeneous gold as well as magnetic catalysts have been applied for the A 3 coupling reaction. Herein we report for the first time the use of caffeine as a naturally occurring and cheap compound for the modification of magnetic NPs and for the stabilization of gold metal.…”

Section: Introductionmentioning

confidence: 99%

Caffeine gold complex supported on magnetic nanoparticles as a green and high turnover frequency catalyst for room temperature A³ coupling reaction in water

Gholinejad

Afrasi

Nájera

2019

Applied Organom Chemis

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A new heterogeneous catalyst derived from gold (III) and supported on caffeine‐coated magnetic nanoparticles, Fe3O4@Caff‐Au, has been prepared and characterized using different techniques. This magnetic gold composite shows high catalytic activity in A3 coupling reactions of terminal alkynes, aldehydes and secondary amines. Using this green catalyst, propargylamines are obtained in high turnover frequency in short reaction times using water as solvent at room temperature. This stable and ready accessible catalyst can be easily recycled magnetically for at least nine consecutive runs without significant loss of activity and with slight aggregation of Au species.

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Nanocrystalline magnesium oxide stabilized gold nanoparticles: an advanced nanotechnology based recyclable heterogeneous catalyst platform for the one-pot synthesis of propargylamines

Cited by 93 publications

References 65 publications

Green synthesis of CuO nanoparticles by aqueous extract of Anthemis nobilis flowers and their catalytic activity for the A3 coupling reaction

Green synthesis of CuO nanoparticles by aqueous extract of Anthemis nobilis flowers and their catalytic activity for the A3 coupling reaction

Sodium alginate/magnesium oxide nanocomposite scaffolds for bone tissue engineering

Caffeine gold complex supported on magnetic nanoparticles as a green and high turnover frequency catalyst for room temperature A³ coupling reaction in water

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Nanocrystalline magnesium oxide stabilized gold nanoparticles: an advanced nanotechnology based recyclable heterogeneous catalyst platform for the one-pot synthesis of propargylamines

Cited by 93 publications

References 65 publications

Green synthesis of CuO nanoparticles by aqueous extract of Anthemis nobilis flowers and their catalytic activity for the A3 coupling reaction

Green synthesis of CuO nanoparticles by aqueous extract of Anthemis nobilis flowers and their catalytic activity for the A3 coupling reaction

Sodium alginate/magnesium oxide nanocomposite scaffolds for bone tissue engineering

Caffeine gold complex supported on magnetic nanoparticles as a green and high turnover frequency catalyst for room temperature A3 coupling reaction in water

Contact Info

Product

Resources

About

Caffeine gold complex supported on magnetic nanoparticles as a green and high turnover frequency catalyst for room temperature A³ coupling reaction in water