Synthesis and Antimicrobial Evaluation of New 2-Methylquinazolin-4(3H)-one Phosphorothioates
摘要:
A SERIES of new compounds characterized by presence of quinazoline scaffold and phosphorothioate moiety in their molecular structure, was prepared through reacting Japanese reagent (JR, 1a) and Lawesson reagent (LR, 1b) with quinazoline-4-ones (3a-e) in boiling toluene. The expected quinazoline-4-thiones were also formed and well identified. Molecular docking studies were performed to determine the molecular affinity between the new products and the target protein. The starting quinazolines and ten of the new products were in vitro evaluated as antimicrobial agents using Cephradine and Fluconazole as reference drugs for antibacterial and antifungal assays, respectively. Of particularly, the dioxathiaphosphinane (12) and benzoxaphospholylidene (17) exhibited 15% potent inhibition that equals to Cephradine against Escherichia coli strains.
Ruthenium(II) complexes with 2-methyl-3-substituted (3H)-quinazolin-4-ones
作者:K.Laxma Reddy、P. Lingaiah、K.Veera Reddy
DOI:10.1016/s0277-5387(00)84550-7
日期:1986.1
complexes of some polydentate ON, OO and ONO donors in the form of 2-methyl-3-substituted (3H)-quinazolin-4-ones have been synthesized and studied. The reactionbetween RuCl2(DMSO)4 and the uninegative bidentate ligands yielded complexes of the type Ru(DMSO)2(OO)2 (OO = MHQ, PHQ, MHEQ, MHPQ or MCMQ), displacing only two DMSO groups along with chlorides, whereas the neutral bidentate ligands gave
合成了一些多齿ON,OO和ONO供体的钌(II)配合物,它们以2-甲基-3-取代的(3 H)-喹唑啉-4-酮的形式存在,并且研究过。RuCl 2(DMSO)4与非负二齿配体之间的反应产生Ru(DMSO)2(OO)2类型的配合物(OO= MHQ,PHQ,MHEQ,MHPQ或MCMQ),仅取代了两个DMSO基团以及氯化物,而中性双齿配体给出RuCl 2(ON)2(ON= MAQ,PAQ,MANQ,PANQ,MAAQ,MAPQ,MPQ或PPQ),取代了所有DMSO基团。然而,具有O = N = O供体的单负性齿状配体(MHAQ)生成了钌(II)的双螯合物。
Dash, B.; Dora, E. K.; Panda, C. S., Journal of the Indian Chemical Society, 1980, vol. 57, # 8, p. 835 - 836
作者:Dash, B.、Dora, E. K.、Panda, C. S.
DOI:——
日期:——
DASH B.; DORA E. K.; PANDA C. S., J. INDIAN CHEM. SOC., 1980, 57, NO 8, 835-836
作者:DASH B.、 DORA E. K.、 PANDA C. S.
DOI:——
日期:——
Expeditious Synthesis and Spectroscopic Characterization of 2-Methyl-3-substituted-quinazolin-4(3H)-one Derivatives
作者:OLAYINKA O. AJANI、OLUWATOSIN Y. AUDU、MARKUS W. GERMANN、BABATUNDE L. BELLO
DOI:10.13005/ojc/330203
日期:2017.4.28
Quinazoline and quinazolinone derivatives are well-known bioactive heterocycles owing to their therapeutic diversity and extensive medicinal application in drug design and pharmaceutics. A series of 2-methyl-3-substituted quinazolin-4(3H)-one derivatives 8a-q was herein synthesized from synthetic conversion of anthranilic acid to 2-methyl-4H-3,1-benzoxazi-4-one, 7 which was subsequently transformed to the targeted 2,3-disubstituted quinazolin-4(3H)-one derivatives 8a-q by reacting with some notable amino-containing moieties via an ameliorable pathway. The catalyst-free synthesis was successful achieved by careful reaction optimization study using solvent choice and reaction temperature variability as key parameters. The chemical structures of the synthesized compounds were confirmed by IR, UV, 1H-NMR, 13C-NMR and DEPT-135 as well as analytical data.
A SERIES of new compounds characterized by presence of quinazoline scaffold and phosphorothioate moiety in their molecular structure, was prepared through reacting Japanese reagent (JR, 1a) and Lawesson reagent (LR, 1b) with quinazoline-4-ones (3a-e) in boiling toluene. The expected quinazoline-4-thiones were also formed and well identified. Molecular docking studies were performed to determine the molecular affinity between the new products and the target protein. The starting quinazolines and ten of the new products were in vitro evaluated as antimicrobial agents using Cephradine and Fluconazole as reference drugs for antibacterial and antifungal assays, respectively. Of particularly, the dioxathiaphosphinane (12) and benzoxaphospholylidene (17) exhibited 15% potent inhibition that equals to Cephradine against Escherichia coli strains.