34425-86-0Relevant academic research and scientific papers
A straightforward TBHP-mediated synthesis of 2-amidobenzoic acids from 2-arylindoles and their antimicrobial activity
Patel, Om P.S.,Dhiman, Shiv,Khan, Shahid,Shinde, Vikki N.,Jaspal, Sonam,Srivathsa, Manu R.,Jha, Prabhat N.,Kumar, Anil
, p. 5962 - 5970 (2019/06/24)
A simple and highly efficient strategy has been developed for the synthesis of 2-amidobenzoic acids through the tert-butyl hydroperoxide (TBHP)-mediated oxygenation and sequential ring opening of 2-arylindoles in a one-pot fashion under metal-free aerobic conditions. The developed synthetic protocol is operationally simple, tolerates a wide range of functional groups, and is amenable to the gram-scale. Radical trapping experiments revealed that the reaction involves a radical pathway. The synthesized compounds (2a-s) were tested for in vitro antimicrobial activity. Among all screened compounds, 2d showed the maximum antibacterial activity against P. aerugunosa (ZOI = 17 mm, MIC = 32 μg mL-1) and compounds 2d and 2p showed the maximum (32 μg mL-1) antifungal activity against A. flavus and C. albicans.
Precursor-directed combinatorial biosynthesis of cinnamoyl, dihydrocinnamoyl, and benzoyl anthranilates in saccharomyces cerevisiae
Eudes, Aymerick,Benites, Veronica Teixeira,Wang, George,Baidoo, Edward E.K.,Lee, Taek Soon,Keasling, Jay D.,Loqué, Dominique
, (2015/11/24)
Biological synthesis of pharmaceuticals and biochemicals offers an environmentally friendly alternative to conventional chemical synthesis. These alternative methods require the design of metabolic pathways and the identification of enzymes exhibiting ade
Synthesis of some new glutamine linked 2,3-disubstituted quinazolinone derivatives as potent antimicrobial and antioxidant agents
Prashanth,Revanasiddappa
, p. 2665 - 2676 (2013/07/26)
A series of novel glutamine linked 2,3-disubstituted quinazolinone conjugates was synthesized from methyl anthranilate and different substituted acids and acid chlorides. The compounds 5a-l were prepared in good yields. All compounds were screened for their antibacterial activity against Gram-positive and Gram-negative bacteria and for antifungal activity against Candida albicans and Aspergillus flavus using paper disk diffusion technique. The minimum inhibitory concentrations of the compounds were also determined by agar streak dilution method. The compound 5b was found to exhibit the most potent in vitro anti-microbial activity. When tested for their antioxidant activity, compounds 5i and 5l showed potent radical scavenging activity, while compound 5g had moderate effect against 2,2-diphenyl-1-picrylhydrazyl, hydroxyl, nitric oxide, and superoxide radical scavenging assays. These results suggest that, the three quinazolinone analogs (5g, 5i, and 5l) could be considered as useful templates for future development to obtain more potent antioxidant agents.
Kinetics and mechanism of the base-catalyzed oxygenation of 1H-2-phenyl-3-hydroxy-4-oxoquinolines in DMSO/H2O
Czaun, Miklós,Speier, Gábor,Kaizer, József,El Bakkali-Taheri, Nadia,Farkas, Etelka
, p. 6666 - 6672 (2013/07/26)
The oxygenation of 4′-substituted 1H-2-phenyl-3-hydroxy-4- oxoquinolines (PhquinH2) in a DMSO/H2O (50/50) solution leads to the cleavage products at the C2-C3 bond in about 75% yield at room temperature. The oxygenation, deduced from the product compositions, has two main pathways, one proceeding via an endoperoxide leading to CO-release, and the other through a 1,2-dioxetane intermediate without CO-loss. The reaction is specific base-catalyzed and the kinetic measurements resulted in the rate law -a...?[PhquinH2]/a...?t=kOH - [OH-] [PhquinH2] [O2]. The rate constant, activation enthalpy, and entropy at 303.16 K are as follows: kOH-=(2.42±0.03)×103mol -2L2s-1; ΔG?=73. 13±4.02 kJ mol-1; ΔH?=70.60±4. 04 kJ mol-1; ΔS?=-28±2 J mol -1 K-1. The reaction fits a Hammett linear free energy relationship for 4′-substituted substrates, and electron-releasing groups make the oxygenation reaction faster (ρ=-0.258). The EPR spectrum of the reaction mixtures showed the presence of the organic radical 1H-2-phenyl-3-oxyl-4-oxoquinoline and superoxide ion due to single electron transfer from the carbanion to dioxygen. The pathway via 1,2-dioxetane could be proved by chemiluminescence measurements.
Bio-inspired flavonol and quinolone dioxygenation by a non-heme iron catalyst modeling the action of flavonol and 3-hydroxy-4(1H)-quinolone 2,4-dioxygenases
Pap, József S.,Matuz, Andrea,Baráth, Gábor,Kripli, Balázs,Giorgi, Michel,Speier, Gábor,Kaizer, József
experimental part, p. 15 - 21 (2012/06/15)
The mononuclear complex, FeIII(O-bs)(salen) (salenH2 = 1,6-bis(2-hydroxyphenyl)-2,5-diaza-hexa-1,5-diene; O-bsH = O-benzoylsalicylic acid) was synthesized as synthetic enzyme-depside complex, and characterized by spectroscopic methods and X-ray crystal analysis. The dioxygenation of flavonol (flaH) and 3-hydroxy-4-quinolone (quinH2) derivatives in the presence of catalytic amounts of FeIII(O-bs)(salen) results in the oxidative cleavage of the heterocyclic ring to give the corresponding O-benzoylsalicylic and anthranilic acid derivatives with concomitant release of carbon monoxide. These reactions can be regarded as biomimetic functional models with relevance to the iron-containing flavonol and the cofactor-independent 3-hydroxy-4(1H)-quinolone 2,4-dioxygenases.
The base-catalyzed oxygenation of quinoline derivatives
Czaun, Miklós,Speier, Gábor
, p. 5961 - 5963 (2007/10/03)
The base-catalyzed oxygenation of 1H-2-phenyl-3-hydroxy-4-oxoquinoline leads to cleavage products derived from either an endoperoxide or a 1,2-dioxetan intermediate. A persistent 1H-2-phenyl-3-oxy-4-oxoquinoline radical could also be detected by EPR in the reaction mixture.
N2-aroylanthranilamide inhibitors of human factor Xa
Yee, Ying K.,Tebbe, Anne Louise,Linebarger, Jared H.,Beight, Douglas W.,Craft, Trelia J.,Gifford-Moore, Donetta,Goodson Jr., Theodore,Herron, David K.,Klimkowski, Valentine J.,Kyle, Jeffrey A.,Sawyer, J. Scott,Smith, Gerald F.,Tinsley, Jennifer M.,Towner, Richard D.,Weir, Leonard,Wiley, Michael R.
, p. 873 - 882 (2007/10/03)
Reversal of the A-ring amide link in 1,2-dibenzamidobenzene 1 (fXa K(ass) = 0.81 x 106 L/mol) led to a series of human factor Xa (hfXa) inhibitors based on N2-aroylanthranilamide 4. Expansion of the SAR around 4 showed that only smal
