<abstract xmlns="http://www.w3.org/1999/xhtml"><p>A series of nine new 2,3-disubstituted 4(3<italic>H</italic>)-quinazolin-4-one derivatives was furnished starting from the 2-propyl-4(3<italic>H</italic>)-quinazo-line-4-one (<bold>2</bold>). The reinvestigation of the key starting quinazolinone <bold>2</bold> was performed under microwave irradiation (MW) and solvent-free conditions. Combination of MW and phase-transfer catalysis using tetrabutylammonium benzoate (TBAB) as a novel neutral ionic catalyst was used for carrying out <italic>N</italic>-alkylation and condensation reactions of compound <bold>2</bold> as a simple, efficient and eco-friendly technique. The structure of the synthesized compounds was elucidated using different spectral and chemical analyses. <italic>In vitro</italic> antimicrobial activity of the compounds was investigated against four bacterial and two fungal strains; very modest activity was achieved. Some of the synthesized compounds were screened for their antitumor activity against different human tumor cell lines. The screened compounds exhibited a significant antitumor activity on some of the cancer cell lines, melanoma (SK-MEL-2), ovarian cancer (IGROV1), renal cancer (TK-10), prostate cancer (PC-3), breast cancer (MCF7) and colon cancer (HT29). The most active, even more active than the reference 5-fluorouracil, were found to be ethyl 4-[(4-oxo-2-propylquinazolin-3(4<italic>H</italic>)-yl)methyl]benzoate (<bold>3c</bold>), 3-{2-[6-(pyrrolidin-1-yl-sulfonyl)-1,2,3,4-tetrahydroquinoline]-2-oxoethyl}-2-propylquinazolin--4(3<italic>H</italic>)-one (<bold>3e</bold>), <italic>N’</italic>-[(<italic>E</italic>)-(2<italic>H</italic>-1,3-benzodioxo-5-yl)methylidene]-2-(4-oxo-2-propylquinazolin-3(4<italic>H</italic>)-yl)acetohydrazide (<bold>10a</bold>), <italic>N’</italic>-[(<italic>E</italic>)-(4-hydroxyphenyl)methylidene]-2-(4-oxo-2-propylquinazo-lin-3(4<italic>H</italic>) -yl)acetohydrazide (<bold>10b</bold>) and <italic>N’</italic>-[(<italic>E</italic>)-(4-nitrophenyl)methyl idene]-2-(4-oxo-2-propylquinazolin-3(4<italic>H</italic>)-yl)acetohydrazide (<bold>10c</bold>).</p></abstract>

A series of nine new 2,3-disubstituted 4(3H)-quinazolin-4-one derivatives was furnished starting from the 2-propyl-4(3H)-quinazo-line-4-one (2). The reinvestigation of the key starting quinazolinone 2 was performed under microwave irradiation (MW) and solvent-free conditions. Combination of MW and phase-transfer catalysis using tetrabutylammonium benzoate (TBAB) as a novel neutral ionic catalyst was used for carrying out N-alkylation and condensation reactions of compound 2 as a simple, efficient and eco-friendly technique. The structure of the synthesized compounds was elucidated using different spectral and chemical analyses. In vitro antimicrobial activity of the compounds was investigated against four bacterial and two fungal strains; very modest activity was achieved. Some of the synthesized compounds were screened for their antitumor activity against different human tumor cell lines. The screened compounds exhibited a significant antitumor activity on some of the cancer cell lines, melanoma (SK-MEL-2), ovarian cancer (IGROV1), renal cancer (TK-10), prostate cancer (PC-3), breast cancer (MCF7) and colon cancer (HT29). The most active, even more active than the reference 5-fluorouracil, were found to be ethyl 4-[(4-oxo-2-propylquinazolin-3(4H)-yl)methyl]benzoate (3c), 3-{2-[6-(pyrrolidin-1-yl-sulfonyl)-1,2,3,4-tetrahydroquinoline]-2-oxoethyl}-2-propylquinazolin--4(3H)-one (3e), N’-[(E)-(2H-1,3-benzodioxo-5-yl)methylidene]-2-(4-oxo-2-propylquinazolin-3(4H)-yl)acetohydrazide (10a), N’-[(E)-(4-hydroxyphenyl)methylidene]-2-(4-oxo-2-propylquinazo-lin-3(4H) -yl)acetohydrazide (10b) and N’-[(E)-(4-nitrophenyl)methyl idene]-2-(4-oxo-2-propylquinazolin-3(4H)-yl)acetohydrazide (10c).

Synthesis of bioactive quinazolin-4(3<italic>H</italic>)-one derivatives <italic>via</italic> microwave activation tailored by phase-transfer catalysis

Organic Chemistry Department, Faculty of Science

Organic Chemistry Department Faculty of Science

Department, College of Applied Medical Sciences

Acta Pharmaceutica

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Synthesis of bioactive quinazolin-4(3)-one derivatives  microwave activation tailored by phase-transfer catalysis

A series of nine new 2,3-disubstituted 4(3H)-quinazolin-4-one derivatives was furnished starting from the 2-propyl-4(3H)-quinazo-line-4-one (2). The...

Synthesis of bioactive quinazolin-4(3H)-one derivatives via microwave activation tailored by phase-transfer catalysis

Published Online: Jan 16, 2020

Page range: 161 - 178

Accepted: Apr 06, 2019

DOI: https://doi.org/10.2478/acph-2020-0001

Keywords
solid-liquid transfer catalysis, microwave-assisted reaction, 2-propylquinazolinone, -alkylation, 2, 3-disubstituted quinazolinones, anticancer activity

© 2020 Yaser A. El-Badry et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Synthesis of bioactive quinazolin-4(3H)-one derivatives via microwave activation tailored by phase-transfer catalysis

Published Online: Jan 16, 2020

Page range: 161 - 178

Accepted: Apr 06, 2019

DOI: https://doi.org/10.2478/acph-2020-0001

Keywordssolid-liquid transfer catalysis, microwave-assisted reaction, 2-propylquinazolinone, -alkylation, 2, 3-disubstituted quinazolinones, anticancer activity

© 2020 Yaser A. El-Badry et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
solid-liquid transfer catalysis, microwave-assisted reaction, 2-propylquinazolinone, -alkylation, 2, 3-disubstituted quinazolinones, anticancer activity