Polyionene/Br3 Grafted on Magnetic Nanoparticles as an Efficient and Eco-Friendly Catalyst for the Metal Free Synthesis of 3,4-Dihydropyrimidin-2(1H)-Ones/Thiones

Dezfoolinezhad, Elham; Ghodrati, Keivan; Badri, Rashid

doi:10.1007/s12633-018-9977-y

Cited by 6 publications

(1 citation statement)

References 82 publications

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“…The glass powders were centrifuged and washed with water for several times and poured into 0.1 mol L −1 HCl solutions for 1 h to neutralize the excess NaOH. Then, these were cleaned again and dried in oven at 150 • C. Before the polymerization, the glass powders were modified with the silane group [22]. For this purpose, 1 g of glass powders were dispersed in a mixture of 100 mL of ethanol and 20 mL of distilled water by the ultrasonic for 30 min; after that 5.0 mL of ammonium hydroxide with vigorous stirring was added.…”

Section: Preparation Of Glass Powdermentioning

confidence: 99%

Simple and selective extraction of quercetin with microextraction in packed syringe method using modified glass powder by a molecularly imprinted polymer followed by spectrophotometric determination

Sharifi

Bahar

Hallaj

2023

J of Separation Science

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A new sample preparation method based on microextraction in packed syringe was developed for preconcentration of quercetin prior to its spectrophotometric determination. Molecularly imprinted polymers as packing material was used for higher extraction efficiency. First, glass powder as support material because of low cost and available substrate was modified, and then molecularly imprinted polymers were synthesized by the sol-gel method using 3-aminopropyltriethoxysilane as a functional monomer and tetraethyl orthosilicate as cross-linker agent. The combination of a molecularly imprinted polymers and microextraction in packed syringe increased the selectivity and sensitivity. The surface morphology and functionality of the prepared molecularly imprinted polymers was characterized using Fourier-transform infrared spectroscopy, Field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, and thermogravimetric analysis. Different influencing parameters on extraction efficiency such as effect of the number of sample sorption/desorption cycles, type and volume of desorption solvent, pH of the sample solution, and molecularly imprinted polymers amounts were optimized. Under the optimum condition, the proposed method displayed a linear range from 0.01 to 5 µg mL −1 and limit of detection 3.68 ng mL −1 . Relative standard deviation for three replicate determination of 1 µg mL −1 quercetin was 2.1 %. The proposed method was applied successfully for the selective extraction of quercetin from tea and coffee samples. K E Y W O R D S glass powder, microextraction in packed syringe, molecularly imprinted polymer, quercetin 1 INTRODUCTION Flavonoids are group of polyphenolic compounds that exhibits biological effects such as anti-oxidative, anti-Abbreviations: APTES, 3-aminopropyltriethoxysilane; MEPS, microextraction in packed syringe; MIP, molecularly imprinted polymer; TEOS, tetraethyl orthosilicate. inflammatory, anti-allergenic, antithrombotic, hepatoprotective, and antiviral activities. They have divided into subclasses of flavones, isoflavones, flavonols, flavanals, flavanones, anthocyanidins, and chalcones [1-3]. Quercetin (flavonol) is one of the most abundant flavonoids present in various foods including vegetables and fruits like black and green tea, cocoa powder, apple, onion, tomato, broccoli, and other leafy green vegetables [4]. Quercetin shows

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Section: Preparation Of Glass Powdermentioning

confidence: 99%

Simple and selective extraction of quercetin with microextraction in packed syringe method using modified glass powder by a molecularly imprinted polymer followed by spectrophotometric determination

Sharifi

Bahar

Hallaj

2023

J of Separation Science

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Developments of pyridodipyrimidine heterocycles and their biological activities

et al. 2023

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The entitled review aimed to assemble and highlight the synthetic approaches and biological aspects of heterocycles with pyridodipyrimidine motifs. The recent synthetic approaches were categorized according to the accomplishments of the approaches under catalyst or catalyst-free conditions. The topic involved the synthesis of substituted tricyclic systems and spirocyclic systems. The present study offered an overview of the recent literature in addition to a scope of the preceding literature. The proposed mechanisms of the varied target products were discussed. Pyridodipyrimidine displayed potential and privileged cytotoxic, antioxidant, and antimicrobial performances. The competitions, challenges, and prospects are also deliberated.

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An efficient three-component one-pot synthesis of 3, 4-dihydropyrimidin-2-(1H)-thione derivatives with a mesoporous iron ion exchanged Indian clay catalyst

Kancherla,

Seku,

Badathala

2024

Res Chem Intermed

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Polyionene/Br3 Grafted on Magnetic Nanoparticles as an Efficient and Eco-Friendly Catalyst for the Metal Free Synthesis of 3,4-Dihydropyrimidin-2(1H)-Ones/Thiones

Cited by 6 publications

References 82 publications

Simple and selective extraction of quercetin with microextraction in packed syringe method using modified glass powder by a molecularly imprinted polymer followed by spectrophotometric determination

Simple and selective extraction of quercetin with microextraction in packed syringe method using modified glass powder by a molecularly imprinted polymer followed by spectrophotometric determination

Developments of pyridodipyrimidine heterocycles and their biological activities

An efficient three-component one-pot synthesis of 3, 4-dihydropyrimidin-2-(1H)-thione derivatives with a mesoporous iron ion exchanged Indian clay catalyst

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