Green synthesis and antibacterial, antifungal activities of 4H-pyran, tetrahydro-4H-chromenes and spiro2-oxindole derivatives by highly efficient Fe3O4@SiO2@NH2@Pd(OCOCH3)2 nanocatalyst

Heravi, Mohammad Reza Poor; Aghamohammadi, Parinaz; Vessally, Esmail

doi:10.1016/j.molstruc.2021.131534

Cited by 28 publications

(12 citation statements)

References 40 publications

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“…The wide absorption band at approximately 594.5 cm −1 in the FT‐IR spectra corresponds to the stretching vibration of Fe–O, indicating the presence of Fe 3 O 4 nanoparticles in AMNPs (Figure 1b) and AMNPs‐A+N (Figure 1c) (Fang et al., 2016). The coating of silica and the amino modification of Fe 3 O 4 nanoparticles were confirmed by the bands at 1080.7 cm −1 and 1570 cm −1 , which correspond to the Si–O antisymmetric stretching vibration and N–H vibration, respectively (Poor Heravi et al., 2022). Compared with Figure 1b, the absorption peak of –OH near 3420 cm −1 in Figure 1c has obvious changes, which can be attributed to the introduction of the CO–NH of the complex enzyme.…”

Section: Resultsmentioning

confidence: 99%

Milk protein hydrolysates obtained with immobilized alcalase and neutrase on magnetite nanoparticles: Characterization and antigenicity study

Qin

Yang

et al. 2022

Journal of Food Science

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Enzymatic hydrolysis is the most commonly used method to reduce the antigenicity of milk protein, but free protease is unstable and difficult to recycle after application. In this study, alcalase and neutrase were selected for immobilization on the modified magnetic Fe 3 O 4 nanoparticles. The reusability of the immobilized enzyme was 68.23% of the total starting activity after 5 recycling batches. The optimal hydrolysis conditions were an enzyme to substrate ratio of 6000 U/g and reaction at 50°C and pH 8.5 for 3 h. Under these conditions, 22.76% hydrolysis of hydrolysate was achieved, and the antigenicity reduction rates of β-lactoglobulin and casein were 21.34% and 30.89%, respectively. In addition, 82.75% of the hydrolysate had a molecular weight less than 1 kDa, and free amino acids represented 13.65% of the sample. This result showed that the hydrolysis with immobilized enzyme was similar to that with free enzyme and the immobilized enzyme could be applied to produce hypoallergenic hydrolysate.

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Section: Resultsmentioning

confidence: 99%

Milk protein hydrolysates obtained with immobilized alcalase and neutrase on magnetite nanoparticles: Characterization and antigenicity study

Qin

Yang

et al. 2022

Journal of Food Science

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“…To compare the catalytic activity of Ta-MOF nanostructures with previous reports, synthesis 4c were examined. A review of previous reports showed that Dibutylamine ( Kalla et al, 2015 ) and Fe 3 O 4 @SiO 2 @NH 2 @Pd(OCOCH 3 ) 2 (Pd MNPs) ( Heravi et al, 2022 ) recently reported for synthesis of 4c. The comparison results of the synthesis methods were given in Table 3 .…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of new 1,4-dihydropyran derivatives by novel Ta-MOF nanostructures as reusable nanocatalyst with antimicrobial activity

et al. 2022

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Novel Ta- MOF was synthesized under mild conditions by ultrasound irradiations. The sample was characterized by SEM, FTIR, XRD, XPS, TG and BET technique. The final structures showed high physicho-chemical properties including narrow particle size distribution, homogenous morphology, high thermal stability and remarkable surface area. Ta- MOF synthesized in this study was used as a catalyst in the synthesis of 1,4-dihydropyran derivatives. The results proved that it has a high catalyst capability. Its advantages include high recyclability, less reaction time with higher efficiency and synthesis of new1,4-dihydropyran derivatives. In the following, antimicrobial activity including antifungal and antibacterial activity of Ta- MOF nanoparticles based on Minimum Inhibitory Concentration, Minimum Fungicidal Concentration and Minimum Bactericidal Concentration were evaluated. The synthesized Ta- MOF, in addition to high catalytic properties, showed high antimicrobial activity with MIC value between 16 and −256 μg/ml, and can be introduced as an agent against bacteria and fungi.

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“…A cornerstone principle of green chemistry involves executing organic reactions within environmentally benign solvents that fulfill several criteria, including non‐toxicity, cost‐effectiveness, safety, widespread availability, and ease of handling and recycling. A prominent exemplar of such a solvent is aqueous media [4] …”

Section: Introductionmentioning

confidence: 99%

[CMMIM][BF₄] as a Sustainable Catalyst for Spirooxindoles Synthesis via One‐Pot Multicomponent Reaction: Insights into their Photophysical Properties and Theoretical Calculations

Kali,

Maiti

2024

ChemistrySelect

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This study shows an effective approach for the synthesis of spirooxindole‐pyrans and bis‐spirooxindole‐pyrans derivatives using 5 mol % of [CMMIM][BF4] ionic liquid. The synthesis of a library of 28 derivatives was accomplished with impressive yields, ranging from 81 % to 97 %. The derivatives were successfully characterized by 1H‐NMR, 13C‐NMR, FT‐IR, and high‐resolution mass spectral techniques. In addition, the photophysical properties of 17 selected derivatives, including the molar extinction coefficient (ϵ) and the Stokes shift (Δυ̅), have been investigated. The values for spirooxindole‐pyrans vary between 14863 to 47372 and 5516 to 9766 cm−1, respectively. On the other hand, the corresponding values vary from 30871 to 57622 and 9199 to 13351 cm−1 for bis‐spirooxindole‐pyrans. Furthermore, the experimental data is supported by density functional theory (DFT) and time‐dependent DFT calculations. The theoretical studies conducted demonstrated a trend remarkably consistent with the experimental results.

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Green synthesis and antibacterial, antifungal activities of 4H-pyran, tetrahydro-4H-chromenes and spiro2-oxindole derivatives by highly efficient Fe3O4@SiO2@NH2@Pd(OCOCH3)2 nanocatalyst

Cited by 28 publications

References 40 publications

Milk protein hydrolysates obtained with immobilized alcalase and neutrase on magnetite nanoparticles: Characterization and antigenicity study

Milk protein hydrolysates obtained with immobilized alcalase and neutrase on magnetite nanoparticles: Characterization and antigenicity study

Synthesis and characterization of new 1,4-dihydropyran derivatives by novel Ta-MOF nanostructures as reusable nanocatalyst with antimicrobial activity

[CMMIM][BF₄] as a Sustainable Catalyst for Spirooxindoles Synthesis via One‐Pot Multicomponent Reaction: Insights into their Photophysical Properties and Theoretical Calculations

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Green synthesis and antibacterial, antifungal activities of 4H-pyran, tetrahydro-4H-chromenes and spiro2-oxindole derivatives by highly efficient Fe3O4@SiO2@NH2@Pd(OCOCH3)2 nanocatalyst

Cited by 28 publications

References 40 publications

Milk protein hydrolysates obtained with immobilized alcalase and neutrase on magnetite nanoparticles: Characterization and antigenicity study

Milk protein hydrolysates obtained with immobilized alcalase and neutrase on magnetite nanoparticles: Characterization and antigenicity study

Synthesis and characterization of new 1,4-dihydropyran derivatives by novel Ta-MOF nanostructures as reusable nanocatalyst with antimicrobial activity

[CMMIM][BF4] as a Sustainable Catalyst for Spirooxindoles Synthesis via One‐Pot Multicomponent Reaction: Insights into their Photophysical Properties and Theoretical Calculations

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[CMMIM][BF₄] as a Sustainable Catalyst for Spirooxindoles Synthesis via One‐Pot Multicomponent Reaction: Insights into their Photophysical Properties and Theoretical Calculations