Screening of natural deep eutectic solvents for green synthesis of 2-methyl-3-substituted quinazolinones and microwave-assisted synthesis of 3-aryl quinazolinones in ethanol

In this study, two fast and efficient protocols for green synthesis of 3-substituted quinazolinones were perfomed. A synthesis of 2-methyl-3-substituted quinazolinones was performed in natural deep eutectic solvents, while 3-aryl quinazolinones were obtained by using microwave assisted synthesis. Be...

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Permalink: http://skupni.nsk.hr/Record/nsk.NSK01001074286/Details
Matična publikacija: Croatica chemica acta (Online)
92 (2019), 4 ; str. 511-517
Glavni autori: Komar, Mario (Author), Molnar, Maja, biotehnologinja, Konjarević, Anastazija
Vrsta građe: e-članak
Jezik: eng
Predmet:
Online pristup: https://doi.org/10.5562/cca3597
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245 1 0 |a Screening of natural deep eutectic solvents for green synthesis of 2-methyl-3-substituted quinazolinones and microwave-assisted synthesis of 3-aryl quinazolinones in ethanol  |h [Elektronička građa] /  |c Mario Komar, Maja Molnar, Anastazija Konjarević. 
300 |b Graf. prikazi. 
504 |a Bibliografija: 47 jed. 
504 |a Summary. 
520 |a In this study, two fast and efficient protocols for green synthesis of 3-substituted quinazolinones were perfomed. A synthesis of 2-methyl-3-substituted quinazolinones was performed in natural deep eutectic solvents, while 3-aryl quinazolinones were obtained by using microwave assisted synthesis. Benzoxazinone, which was used as an intermediate in the synthesis of 2-methyl-3-substituted quinazolinones, was prepared conventionally from anthranilic acid and acetic anhydride. In order to find the most appropriate synthetic path, twenty natural deep eutectic solvents were applied as a solvent in these syntheses. Choline chloride:urea (1 : 2) was found to be the most efficient solvent and was further used in the synthesis of 2-methyl quinazolinone derivatives (2–12). 3-Aryl quinazolinones (13–17), on the other hand, were synthesized in one-pot microwave-assisted reaction of anthranilic acid, different amines and trimethyl orthoformate. All compounds were synthesized in good to excellent yields, characterized by LC-MS/MS spectrometry and 1H- and 13C-NMR spectroscopy. 
653 0 |a Zelena tehnologija  |a Eutektička otapala  |a Duboka eutektička otapala  |a Prirodna eutektička otapala  |a Etanol  |a Mikrovalna sinteza  |a Kinazolin  |a Kinazolinoni  |a Antranilna kiselina  |a Amini  |a Supstitucija 
700 1 |a Molnar, Maja,  |c biotehnologinja  |4 aut 
700 1 |a Konjarević, Anastazija  |4 aut 
773 0 |t Croatica chemica acta (Online)  |x 1334-417X  |g 92 (2019), 4 ; str. 511-517  |w nsk.(HR-ZaNSK)000255036 
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