2019
DOI: 10.1016/j.molstruc.2019.02.080
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Asparagine functionalized Al2O3 nanoparticle as a superior heterogeneous organocatalyst in the synthesis of 2-aminothiazoles

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Cited by 18 publications
(10 citation statements)
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“…Furthermore, a pure PVA film, without Al 2 O 3 , was prepared in a similar way for comparative studies ( Figure 6). Al2O3 nanoparticles act as a Bronsted base [11] via deprotonation of the thiol group of 2arylidenehydrazine-1-carbothioamide (1a-g). The producing thiolate anion attacks α−halocarbonyl compounds (2a,b) with displacement of chlorine atom to give non-isolable intermediate.…”
Section: Preparation Of Pva-al 2 O 3 Composite Filmsmentioning
confidence: 99%
See 1 more Smart Citation
“…Furthermore, a pure PVA film, without Al 2 O 3 , was prepared in a similar way for comparative studies ( Figure 6). Al2O3 nanoparticles act as a Bronsted base [11] via deprotonation of the thiol group of 2arylidenehydrazine-1-carbothioamide (1a-g). The producing thiolate anion attacks α−halocarbonyl compounds (2a,b) with displacement of chlorine atom to give non-isolable intermediate.…”
Section: Preparation Of Pva-al 2 O 3 Composite Filmsmentioning
confidence: 99%
“…Aluminum oxide nanoparticles were also used to enhance the thermal and mechanical properties of wood fibers [10]. Conspicuously, aluminum oxide nanoparticles, with large surface area and pore-size distribution, have superior catalytic activities for diverse organic reactions [11,12]. Recently, metal oxide nanoparticles embedded within the polymer matrix have attracted growing interest due to the unique properties that displayed by the hybrid nanocomposites.…”
Section: Introductionmentioning
confidence: 99%
“…Furthermore, aluminum oxide is an amphoteric oxide and exists in various polymorphs such as gamma (ɣ-), delta (δ-), theta (ɵ-), rho (ρ-), eta (η-), kappa (ƙ-) and chi (χ)-alumina, in addition to its stable phase (alpha (α)-alumina, corundum) [26]. Among them, alpha-and gamma-alumina have attracted a significant attention of the research groups based on their unique characteristics; therefore, both polymorphs have various applications as mentioned previously [13][14][15][16] plasma synthesis [28], freeze-drying of sulfate solutions [29], the sol-gel method [30,31], laser ablation [32], controlled hydrolysis of metal alkoxide [33], and precipitation [34], precipitation and sol-gel process followed by calcination [35,36], sputtering [37], electrochemical [38], mechanical milling [39], pyrolysis [40], homogenous precipitation followed by calcination [41], and metal organic chemical vapor deposition [42]. However, limitations of these approaches, for both ɣ-and α-alumina nanoparticles, are of great concerns such as long reaction time, uncontrolled particle size, a high-temperature requirement, and use of expensive and toxic organic solvents.…”
Section: Introductionmentioning
confidence: 97%
“…They showed remarkable applications in catalysis, sensor devices, drug delivery, semiconductor materials, water treatment, and solid oxide fuels [7][8][9][10][11][12]. Among these metal oxides, Al2O3 nanoparticles are one of the nanostructures that have aroused keen interests of the materials science researchers owing to their wide applications such as wear protection, automotive emission control, hydrogenation, metallurgy, refractories, and catalysis in petroleum refining [13][14][15]. These various applications of alumina are due to its interesting characteristics including high catalytic surface activity, good optical activity, high corrosion resistance, and high surface area [16].…”
Section: Introductionmentioning
confidence: 99%
“…Aluminum oxide (Al 2 O 3 or alumina) NPs, with their large surface area and pore-size distributions, are known to possess superior catalytic activities for diverse organic reactions [ 10 ]. Several studies have been led to investigate the thermal properties of Al 2 O 3 NF [ 11 , 12 ].…”
Section: Introductionmentioning
confidence: 99%