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Green Process for the Synthesis of 3-Amino-2-methyl-quinazolin-4(3H)-one Synthones and Amides Thereof:DNA Photo-Disruptive and Molecular Docking Studies. Processes (Basel) 2022. [DOI: 10.3390/pr10020384] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Eleven 3-amino-2-methyl-quinazolin-4(3H)-ones have been synthesized, in good to excellent yields, via their corresponding benzoxazinones using an efficient tandem microwave-assisted green process. Representative acetamides have been thermally derived from their functional free 3-amino group, whereas for the synthesis of various arylamides, a novel green microwave-assisted protocol has been developed, which involved the attack of hydrazides on benzoxazinones. Eight out of the eleven 3-amino-2-methyl-quinazolin-4(3H)-ones were found photo-active towards plasmid DNA under UVB, and four under UVA irradiation. Amongst all acetamides, only the 6-nitro derivative retained activity both under UVB and UVA irradiation, whereas the 6-bromo-substituted one was active only under UVB. 3-arylamido-6-bromo derivatives exhibited dramatically decreased photo-activity; however, all 3-arylamido-6-nitro compounds developed extraordinary activity, even at concentrations as low as 1μM, which was enhanced compared to their parent 3-amino-2-methyl-6-nitro-quinazolinone. Molecular docking studies were indicative of satisfactory binding to DNA and correlated to the presented photo-activity. Since quinazolinones are known “privileged” pharmacophores for anticancer and antimicrobial activities, the present study gives information on turning “on” and “off” photosensitization on various derivatives which are often used as synthones for drug development, when chromophores and auxochromes are incorporated or being functionalized. Thus, certain compounds may lead to the development of novel photo-chemo or photodynamic therapeutics.
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Amer A, Hegazi AH, Alshekh MK, Ahmed HEA, Soliman SM, Maniquet A, Ramsay RR. Design, synthesis, molecular modelling and in vitro screening of monoamine oxidase inhibitory activities of novel quinazolyl hydrazine derivatives. ROYAL SOCIETY OPEN SCIENCE 2020; 7:200050. [PMID: 32431898 PMCID: PMC7211837 DOI: 10.1098/rsos.200050] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Accepted: 02/28/2020] [Indexed: 06/11/2023]
Abstract
A new series of N'-substituted benzylidene-2-(4-oxo-2-phenyl-1,4-dihydroquinazolin-3(2H)-yl)acetohydrazide (5a-5h) has been synthesized, characterized by FT-IR, NMR spectroscopy and mass spectrometry and tested against human monoamine oxidase (MAO) A and B. Only (4-hydroxy-3-methoxybenzylidene) substituted compounds gave submicromolar inhibition of MAO-A and MAO-B. Changing the phenyl substituent to methyl on the unsaturated quinazoline ring (12a-12d) decreased inhibition, but a less flexible linker (14a-14d) resulted in selective micromolar inhibition of hMAO-B providing insight for ongoing design.
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Affiliation(s)
- Adel Amer
- Department of Chemistry, College of Science, Taibah University, Al-Madinah Al-Munawarah, Saudi Arabia
- Department of Chemistry, Faculty of Science, Alexandria University, Alexandria 21321, Egypt
| | - Abdelrahman H. Hegazi
- Department of Chemistry, Faculty of Science, Alexandria University, Alexandria 21321, Egypt
| | - Mohammed Khalil Alshekh
- Department of Chemistry, College of Science, Taibah University, Al-Madinah Al-Munawarah, Saudi Arabia
| | - Hany E. A. Ahmed
- Pharmacognosy and Pharmaceutical Chemistry Department, Pharmacy College, Taibah University, Al-Madinha Al-Munawarah, Saudi Arabia
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Cairo, Egypt
| | - Saied M. Soliman
- Department of Chemistry, Faculty of Science, Alexandria University, Alexandria 21321, Egypt
| | - Antonin Maniquet
- Biomedical Sciences Research Complex, University of St Andrews, Biomolecular Sciences Building, North Haugh, St Andrews KY16 9ST, UK
| | - Rona R. Ramsay
- Biomedical Sciences Research Complex, University of St Andrews, Biomolecular Sciences Building, North Haugh, St Andrews KY16 9ST, UK
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