22876-16-0Relevant academic research and scientific papers
Gold nanoparticle-catalyzed cyclocarbonylation of 2-aminophenols
Noujima, Akifumi,Mitsudome, Takato,Mizugaki, Tomoo,Jitsukawa, Koichiro,Kaneda, Kiyotomi
, p. 608 - 611 (2013)
Gold nanoparticles supported on hydrotalcite acted as a highly efficient catalyst for the cyclocarbonylation of 2-aminophenols to 2-benzoxazolinones without any additives. After the cyclocarbonylation, the hydrotalcite-supported gold nanoparticles could be reused without loss of catalytic efficiency.
Design and synthesis of novel benzo[ d[oxazol-2(3H)-one derivatives bearing 7-substituted-4-enthoxyquinoline moieties as c-Met kinase inhibitors
Lu, Dong,Shen, Aijun,Liu, Yang,Peng, Xia,Xing, Weiqiang,Ai, Jing,Geng, Meiyu,Hu, Youhong
, p. 191 - 200 (2016)
Analysis of the results of studies of docking 1 and 7a with c-Met kinase led to the identification of benzo [d]oxazol-2(3H)-one-quinolone derivatives as potential inhibitors of this enzyme. A molecular hybrid strategy, using a 4-ethoxy-7-substituted-quinoline core and a benzo[d]oxazol-2(3H)-one scaffold, was employed to design members of this family for study as inhibitors of the kinase and proliferation of EBC-1 cells. Most of the substances were found to display good to excellent c-Met kinase inhibitory activities. The results of a structureeactivity relationship (SAR) study led to the discovery of benzo[d]oxazol-2(3H)-one-quinolone 13, which has IC50 values of 1 nM against c-Met kinase and 5 nM against proliferation of the EBC-1 cell line.
Synthesis and biological activities of some 1,3-benzoxazol-2(3H)-one derivatives as anti-quorum sensing agents
Miandji,Ulusoy,Duendar,Oezgen,Onurdag,Bosgelmez-Tnaz,Noyanalpan
, p. 330 - 334 (2012)
Antibiotics are commonly used to treat microbial infections. Due to misuse or large-scale use of antibiotics, many pathogens have gained resistance which makes antibiotic treatments ineffective. The discovery that many bacteria use quorum sensing (QS) to regulate their virulence factor and pathogenicity production makes the QS system an attractive target for antimicrobial therapy. A series of 1,3-benzoxazol-2(3H)-one derivatives were designed and synthesized as QS inhibitors (QSIs) and tested for their QS inhibitory activities. In vitro quorum sensing inhibitor screen (QSIS) assay indicated that the 1,3-benzoxazol-2(3H)-one (compound 1), 5-chloro-1,3-benzoxazol-2(3H)-one (compound 6), 6-methyl-1,3-benzoxazol-2(3H)-one (compound 11), and 5-methyl-1,3-benzoxazol-2(3H)-one (compound 16), inhibit QS system in quorum sensing selector (QSIS)1 strain. These 4 QSIs also significantly reduced elastase production, biofilm formation and swarming motility of Pseudomonas aeruginosa PA01 strain. These results suggest that compound 1, 6, 11 and 16 may provide a starting point for the design and development of new anti-pathogenic drugs that restrict virulence of P. aeruginosa and possibly other clinically important human pathogens. In addition, these QSI molecules could potentially be used in combination with conventional antibiotics to increase the efficiency of disease control and to extend the life span of established antimicrobials. Georg Thieme Verlag KG Stuttgart · New York.
Method for preparing carbonyl heterocyclic compound
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Paragraph 0036-0040; 0102-0107, (2020/03/25)
The invention provides a method for preparing a carbonyl heterocyclic compound, wherein Lewis base and hydrosilane are used as accelerators and can efficiently enable an ortho-substituted aniline compound to react with normal-pressure CO2 to generate corresponding carbonyl heterocyclic compounds containing different functional groups under mild conditions (100 DEG C, digital). According to the method, normal-pressure CO2 is used as an environmentally-friendly non-toxic carbonylation reagent, and cheap Lewis base and PMHS (industrial silicon waste) are used as accelerators, so that the use of CO, high-pressure CO2 and noble metal catalysts is avoided, the intermediate isocyanate does not need to be purified and separated, the pure product can be obtained only through simple suction filtration and separation after the reaction is finished, and the synthetic method is efficient and universal, is suitable for preparing a series of benzimidazolone, benzoxazolone and benzothiazolone compounds and has high industrial application value.
Versatile Cp*Co(III)(LX) Catalyst System for Selective Intramolecular C-H Amidation Reactions
Chang, Sukbok,Jung, Hoimin,Kim, Dongwook,Lee, Jeonghyo,Lee, Jia,Park, Juhyeon
, p. 12324 - 12332 (2020/08/06)
Herein, we report the development of a tailored cobalt catalyst system of Cp*Co(III)(LX) toward intramolecular C-H nitrene insertion of azidoformates to afford cyclic carbamates. The cobalt complexes were easy to prepare and bench-stable, thus offering a convenient reaction protocol. The catalytic reactivity was significantly improved by the electronic tuning of the bidentate LX ligands, and the observed regioselectivity was rationalized by the conformational analysis and DFT calculations of the transition states. The superior performance of the newly developed cobalt catalyst system could be broadly applied to both C(sp2)-H and C(sp3)-H carbamation reactions under mild conditions.
Selenium-Catalyzed Carbonylative Synthesis of 2-Benzimidazolones from 2-Nitroanilines with TFBen as the CO Source
Qi, Xinxin,Zhou, Rong,Peng, Jin-Bao,Ying, Jun,Wu, Xiao-Feng
supporting information, p. 5161 - 5164 (2019/01/25)
A selenium-catalyzed carbonylative reaction for the synthesis of 2-benzimidazolones from 2-nitroanilines has been developed. In this strategy, to avoid the usage of toxic CO gas, TFBen (benzene-1,3,5-triyl triformate) was used as a solid and stable CO precursor, and a variety of desired 2-benzimidazolones were produced in moderate to excellent yields.
Iron-Catalyzed Arene C-H Amidation Using Functionalized Hydroxyl Amines at Room Temperature
Prasanthi,Begum, Samiyara,Srivastava, Hemant Kumar,Tiwari, Sandip Kumar,Singh, Ritesh
, p. 8369 - 8375 (2018/09/06)
Herein, we report Fe(III)(TPP)Cl as an effective catalyst for promoting arene C-H amidation through intramolecular cyclization of N-tosyloxyarylcarbamate substrates. The reaction proceeds via nitrene (outer sphere pathway) C(sp2)-H i
Visible-Light-Induced Intramolecular C(sp2)-H Amination and Aziridination of Azidoformates via a Triplet Nitrene Pathway
Zhang, Yipin,Dong, Xunqing,Wu, Yanan,Li, Guigen,Lu, Hongjian
, p. 4838 - 4842 (2018/08/24)
Catalytic intramolecular C-H amination and aziridination reactions of o-allylphenyl azidoformates have been achieved under visible-light irradiation, providing a mild, clean, and efficient method for the synthesis of useful benzoxazolones and [5.1.0] bicyclic aziridines. Mechanistic studies suggest that a triplet nitrene acts as the reactive intermediate. The chemoselectivity of the reaction, with alkyl olefin aziridination ? electron deficient olefin aziridination ≈ C(sp2)-H amination ? C(sp3)-H amination was observed, which may be instructive in the development of an understanding of visible-light-induced triplet nitrene transformation reactions.
Rhodium(II)-Catalyzed Undirected and Selective C(sp2)-H Amination en Route to Benzoxazolones
Singh, Ritesh,Nagesh, Kommu,Parameshwar, Matam
, p. 6520 - 6524 (2016/10/14)
Rhodium(II) can effectively promote the activation and cyclization of arylcarbamate substrates to yield benzoxazolones via an intramolecular nitrene C-H insertion reaction. Investigation of the substrate scope shows that the reaction undergoes selective a
Catalytic Oxidative Carbonylation of Amino Moieties to Ureas, Oxamides, 2-Oxazolidinones, and Benzoxazolones
Mancuso, Raffaella,Raut, Dnyaneshwar S.,Della Ca, Nicola,Fini, Francesco,Carfagna, Carla,Gabriele, Bartolo
, p. 2204 - 2211 (2015/07/15)
The direct syntheses of ureas, oxamides, 2-oxazolidinones, and benzoxazolones by the oxidative carbonylation of amines, β-amino alcohols, and 2-aminophenols allows us to obtain high value added molecules, which have a large number of important applications in several fields, from very simple building blocks. We have found that it is possible to perform these transformations using the PdI2/KI catalytic system in an ionic liquid, such as 1-butyl-3-methylimidazolium tetrafluoroborate, as the solvent, the solvent/catalyst system can be recycled several times with only a slight loss of activity, and the product can be recovered easily by crystallization.
