Sodium Benzoate as a Green, Efficient, and Recyclable Catalyst for Knoevenagel Condensation

Liu, Qing; Ai, Hongmei

doi:10.1080/00397911.2011.574245

Cited by 23 publications

(7 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Literature survey also reveals that sodium benzoate has been employed as an eco-friendly base catalyst for the synthesis of cyclic ketones, 44 arylmethylene isoxazol-5(4H)-ones, 45 and substituted olefins via Knoevenagel condensation. 46 In consideration of green chemical methodology, here we report the synthesis of pyranopyrazoles (5) starting from aryl aldehydes (1), hydrazines (2), ethyl acetoacetate (3), and malononitrile (4) using sodium benzoate as the mild basic catalyst in water (Scheme 1).…”

mentioning

confidence: 99%

One-pot, four-component synthesis of pyrano[2,3-c]pyrazoles catalyzed by sodium benzoate in aqueous medium

Kiyani¹,

Samimi²,

Ghorbani³

et al. 2013

10.5267/j.ccl

View full text Add to dashboard Cite

An efficient, green, and facile four-component reaction for the preparation of pyrano [2,3-c]pyrazole derivatives through the condensation reaction of aryl aldehydes, ethyl acetoacetate, malononitrile, and hydrazine hydrate or phenyl hydrazine in the presence of commercially available organocatalyst sodium benzoate under aqueous condition is reported. The products are produced with high yields and in shorter reaction times. It also is mild, safe, green and environmental friendly.

show abstract

mentioning

confidence: 99%

One-pot, four-component synthesis of pyrano[2,3-c]pyrazoles catalyzed by sodium benzoate in aqueous medium

Kiyani¹,

Samimi²,

Ghorbani³

et al. 2013

10.5267/j.ccl

View full text Add to dashboard Cite

show abstract

“…Following our research studies on Knoevenagel condensation and FDU‐12,,, especially for the demand green synthesis, FDU‐12‐NH 2 was prepared through the post‐synthesis‐grafting method and used as the catalyst for this reaction under ultrasound irradiation. In order to obtain a clear interrelationship among catalyst structure, reaction conditions and the catalytic activity, the samples were characterized systematically and the reaction conditions were optimized in this work.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonication‐assisted Synthesis of α, β‐Unsaturated Compounds Catalyzed by Amino‐functionalized FDU‐12 Catalyst

Yang

Zhang

et al. 2019

ChemistrySelect

Self Cite

View full text Add to dashboard Cite

Amino-group functionalized FDU-12 material (FDU-12-NH 2 ) was utilized as an efficient and recyclable catalyst for the Knoevenagel condensation to afford α, β-unsaturated compounds. The catalysts were characterized by nitrogen adsorption, X-ray diffraction, Fourier transform infrared spectrophotometer, scanning electron microscopy, transmission electron microscopy and thermogravimetric analysis, which showed that FDU-12-NH 2 was successfully prepared using the post-synthesis-grafting method. Compared with the magnetic stirring method, the ultrasound-assisted method could improve the Knoevenagel reaction significantly in this work. In addition, the catalyst exhibited the highest catalytic activity in the mixed solvent of ethanol and water with volume ratio of 3 : 1 due to the solvent effect. Various substrates could convert to their desired products with high yields in short time; what's more, it could be used for four times without significant decrease of the activity. This work reveals that FDU-12-NH 2 is a promising heterogeneous catalyst for the synthesis of α, β-unsaturated compounds.

show abstract

“…Meanwhile, the general public mainly associates lithium batteries with portable electronics and electric and hybrid vehicles, large storage capacity lithium batteries are also a lead candidate for a possible energy storage solution for the electric grid, intelligent network, etc. Batteries with large capacity are needed to store green energy, wind, that is, sun and waves, all this by their nature intermittent sources of energy [20][21][22][23][24][25][26][27][28][29][30]. Nowadays battling to achieve a greater percentage of green energy, high-capacity batteries or energy banks are mandatory.…”

Section: Introductionmentioning

confidence: 99%

Lithium Recovery from Brines Including Seawater, Salt Lake Brine, Underground Water and Geothermal Water

Samadiy¹,

Yu²,

Li³

et al. 2020

Thermodynamics and Energy Engineering

View full text Add to dashboard Cite

Demand to lithium rising swiftly as increasing due to its diverse applications such as rechargeable batteries, light aircraft alloys, air purification, medicine and nuclear fusion. Lithium demand is expected to triple by 2025 through the use of batteries, particularly electric vehicles. The lithium market is expected to grow from 184,000 TPA of lithium carbonate to 534,000 TPA by 2025. To ensure the growing consumption of lithium, it is necessary to increase the production of lithium from different resources. Natural lithium resources mainly associate within granite pegmatite type deposit (spodumene and petalite ores), salt lake brines, seawater and geothermal water. Among them, the reserves of lithium resource in salt lake brine, seawater and geothermal water are in 70-80% of the total, which are excellent raw materials for lithium extraction. Compared with the minerals, the extraction of lithium from water resources is promising because this aqueous lithium recovery is more abundant, more environmentally friendly and cost-effective.

show abstract

Sodium Benzoate as a Green, Efficient, and Recyclable Catalyst for Knoevenagel Condensation

Cited by 23 publications

References 18 publications

One-pot, four-component synthesis of pyrano[2,3-c]pyrazoles catalyzed by sodium benzoate in aqueous medium

One-pot, four-component synthesis of pyrano[2,3-c]pyrazoles catalyzed by sodium benzoate in aqueous medium

Ultrasonication‐assisted Synthesis of α, β‐Unsaturated Compounds Catalyzed by Amino‐functionalized FDU‐12 Catalyst

Lithium Recovery from Brines Including Seawater, Salt Lake Brine, Underground Water and Geothermal Water

Contact Info

Product

Resources

About