16738-00-4Relevant academic research and scientific papers
Synthesis and antibacterial evaluation of new sulfone derivatives containing 2-aroxymethyl-1,3,4-oxadiazole/thiadiazole moiety
Su, Shihu,Zhou, Xia,Liao, Guoping,Qi, Puying,Jin, Linhong
, (2017)
Sulfones are one of the most important classes of agricultural fungicides. To discover new lead compounds with high antibacterial activity, a series of new sulfone derivatives were designed and synthesized by introducing the aroxymethyl moiety into the scaffold of 1,3,4-oxadiazole/thiadiazole sulfones. Antibacterial activities against three phytopathogens (Xanthomonas oryzae pv. oryzae, Ralstonia solanacearum, Xanthomonas axonopodis pv. citri.) were assayed in vitro. As compared to the control of commercial fungicides and some reported sulfone fungicides, seven compounds 5I-1-5I-7 exerted remarkably higher activities with EC50 values ranging from 0.45-1.86 μg/mL against X. oryzae and 1.97-20.15 μg/mL against R. solanacearum. Exhilaratingly, 5I-1, 5I-2 and 5I-4 displayed significant in vivo activity against X. oryzae with protective effect of 90.4%, 77.7%, and 81.1% at 200 μg/mL, respectively, much higher than that exhibited by Bismerthiazol (25.6%) and Thiadiazole-copper (32.0%). And the differential phytotoxicity of active derivatives was preliminarily checked. The results demonstrated that derivative of 2-aroxymethyl-1,3,4-oxadiazole/thiadiazole sulfone can serve as potential alternative bactericides for the management of plant bacterial diseases.
Synthesis, structure analysis, DFT calculations and energy frameworks of new coumarin appended oxadiazoles, to regress ascites malignancy by targeting VEGF mediated angiogenesis
Banumathi,Jyothi, Mahima,Khamees, Hussien Ahmed,Khanum, Shaukath Ara,Prabhakar, B. T.,Sherapura, Ankith,Zabiulla
, (2021/12/24)
Ascites malignancy is a frequent cause of morbidity and presents significant management problems which occur in many cancers. Angiogenesis plays a major role in the prognosis of ascites tumor through Vascular Endothelial Growth Factor (VEGF). Inhibition o
Molecular docking and synthesis of caffeic acid analogous and its anti-inflammatory, analgesic and ulcerogenic studies
Al-Ostoot, Fares Hezam,Ara Khanum, Shaukath,Grisha, S.,Mohammed, Yasser Hussein Eissa,Vivek, H. K.,Zabiulla
, (2020/12/25)
A series of caffeic acid (CA) derivatives 7a-j were synthesized via etherification and coupling action and their chemical structures were elucidated spectroscopically. Motivated by the various biological activities displayed by CA derivatives such as anti-inflammatory, antiviral, anticancer and antioxidant and also based on its extensively consumption in the human diet. In the present work, the newly synthesized compounds 7a-j were evaluated for anti-inflammatory and analgesic action and most of them exerted comparable activity to the reference compound celecoxib. Further, ulcer indexes for the most active compounds were calculated and most of them showed less ulcerogenic effect than the reference drug. Among the title series 7a-j, compounds 7f and 7g with electron withdrawing bromo and chloro group respectively, at the para position of the phenoxy ring was showed good activity compared to all other compounds. Interestingly, the COX-I/COX-II activity ratio of potent compounds 7f and7g showed an almost equal inhibitory effect on both isoenzymes. Further, molecular docking studies have been performed for the potent compounds which showed statistically significant result.
Synthesis, α-glucosidase inhibition, and molecular docking studies of novel N-substituted hydrazide derivatives of atranorin as antidiabetic agents
Alam, Mahboob,Chavasiri, Warinthorn,Duong, Thuc-Huy,Huynh, Ngoc-Vinh,Nguyen, Huu-Hung,Nguyen, Thi-Phuong,Nguyen, Tien-Cong,Paramita Devi, Asshaima,Phan, Hoang-Vinh-Truong,Sichaem, Jirapast,Tran, Hoai-Duc,Tran, Nguyen-Minh-An
, (2020/07/10)
A series of novel N-substituted hydrazide derivatives were synthesized by reacting atranorin, a compound with a natural depside structure (1), with a range of hydrazines. The natural product and 12 new analogues (2–13) were investigated for inhibition of α-glucosidase. The N-substituted hydrazide derivatives showed more potent inhibition than the original. The experimental results were confirmed by docking analysis. This study suggests that these compounds are promising molecules for diabetes therapy. Molecular dynamics simulations were carried out with compound 2 demonstrating the best docking model using Gromac during simulation up to 20 ns to explore the stability of the complex ligand-protein. Furthermore, the activity of all synthetic compounds 2–13 against a normal cell line HEK293, used for assessing their cytotoxicity, was evaluated.
Synthesis and luminescence properties of novel 8-hydroxyquinoline derivatives and their Eu(III) complexes
Wu, Yongqiang,Guo, Tiantong,Shu, Dehua,Zhang, Wu,Luan, Fangfei,Shi, Ling,Guo, Dongcai
, p. 855 - 862 (2018/07/13)
Six novel 8-hydroxyquinoline derivatives were synthesized using 2-methyl-8-hydroxyquinoline and para-substituted phenol as the main starting materials, and were characterized by 1H nuclear magnetic resonance (NMR), mass spectrometry (MS), ultraviolet (UV) light analysis and infra-red (IR) light analysis. Their complexes with Eu(III) were also prepared and characterized by elemental analysis, molar conductivity, UV light analysis, IR light analysis, and thermogravimetric–differential thermal analysis (TG–DTA). The results showed that the ligand coordinated well with Eu(III) ions and had excellent thermal stability. The structure of the target complex was EuY1–6(NO3)3.2H2O. The luminescence properties of the target complexes were investigated, the results indicated that all target complexes had favorable luminescence properties and that the introduction of an electron-donating group could enhance the luminescence intensity of the corresponding complexes, but the addition of an electron-withdrawing group had the opposite effect. Among all the target complexes, the methoxy-substituted complex (–OCH3) had the highest fluorescence intensity and the nitro-substituted complex (–NO2) had the weakest fluorescence intensity. The results showed that 8-hydroxyquinoline derivatives had good energy transfer efficiency for the Eu(III) ion. All the target complexes had a relatively high fluorescence quantum yield. The fluorescence quantum yield of the complex EuY3(NO3)3.2H2O was highest among all target complexes and was up to 0.628. Because of excellent luminescence properties and thermal stabilities of the Eu(III) complexes, they could be used as promising candidate luminescent materials.
Synthesis, Nematicidal Activity, and 3D-QSAR of Novel 1,3,4-Oxadiazole/ Thiadiazole Thioether Derivatives
Chen, Jixiang,Gan, Xiuhai,Yi, Chongfen,Wang, Shaobo,Yang, Yuyuan,He, Fangcheng,Hu, Deyu,Song, Baoan
, p. 939 - 944 (2018/09/22)
Forty one novel 1,3,4-oxadiazole/thiadiazole thioether derivatives containing phenoxy moiety were designed and synthesized. Bioassay demonstrated that some of them showed remarkable activities against Tylenchulus semipenetrans in vitro and in vivo. Compounds 20, 21, 35 and 39 showed excellent lethal activities after treatment for 48?h in vitro, with LC50 values of 13.4?±?1.8, 11.7?±?2.5, 13.7?±?2.4 and 13.3?±?1.1?mg·L–1, respectively, which were obviously superior to fosthiazate (49.1?±?2.8?mg·L–1) and avermectin (26.6?±?2.3?mg·L–1). Compound 21 can effectively control the citrus nematode disease caused by T. semipenetrans at 200?mg·L–1 in vivo with (68?±?3)% inhibitory effect, which was even better than that of avermectin ((63?±?2)%). The CoMFA and CoMSIA models of three-dimensional quantitative structure-activity relationships (3D-QSARs) were established. The compound 33 was designed based on the 3D-QSAR models with more vigorous nematicidal activities in vitro (LC50?=?9.8?±?1.4?mg·L–1) and in vivo ((70?±?5)%). These results demonstrated that compound 33 can be considered as a potential nematicide.
2,5-substituent-1,3,4-oxadiazole (thiadiazole) thioether derivatives as well as preparation method and application thereof
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Paragraph 0046, (2017/04/03)
The invention discloses 2,5-substituent-1,3,4-oxadiazole (thiadiazole) thioether derivatives as well as a preparation method and an application thereof. The 2,5-substituent-1,3,4-oxadiazole (thiadiazole) thioether derivatives have the general formula (I) shown in the following specification, wherein R1 represents as 4-chlorphenyl, 4-fluorophenyl, 4-methylphenyl, 4-methoxyphenyl, 4-nitrophenyl, 4-cyano-3,5-difluorophenyl, 4-trifluoromethylphenyl, 4-trifluoromethoxyphenyl, 4-t-butylphenyl, 2-fluorophenyl and other substituents; R2 represents methyl, ethyl, 4-chlorobenzyl, 2,4-dichlorobenzyl, 4-trifluoromethoxy, benzyl, 4-fluorobenzyl, 4-chlorobenzyl and other substituents; X represents O or S. The compound can be used as a pesticide for killing crop nematode and inhibiting bacterial diseases of crops.
Synthesis of oxadiazole-morpholine derivatives and manifestation of the repressed CD31 Microvessel Density (MVD) as tumoral angiogenic parameters in Dalton's Lymphoma
Al-Ghorbani, Mohammed,Vigneshwaran,Ranganatha, V. Lakshmi,Prabhakar,Khanum, Shaukath Ara
, p. 136 - 146 (2015/06/02)
A series of oxadiazole derivatives possessing morpholine 6a-l were synthesized by nucleophilic substitution reaction of key intermediates [1,3,4]-oxadiazole-2-thiol derivatives 5a-l with 4-(2-chloroethyl) morpholine. Compounds 6a-l were evaluated for their in vitro and in vivo antitumor potential in Dalton's Lymphoma Ascites (DLA) tumor cells. Among 6a-l series, compound 6a with concentration ~8.5 μM have shown extensive cytotoxicity in vitro and 85% reduction in tumor volume in vivo, attributing an excellent anti-proliferative capability towards the cancer cells. Compound 6a has extensively inhibited the Microvessel Density (MVD) or tumoral neovasculature which was evident from the CD31 immuno staining and peritoneal H&E staining. The major reason for the antiproliferative activity of compound 6a was due to the repression of tumor vasculature.
Synthesis, Characterization and Properties of Novel Coumarin Derivatives and Their Europium Complexes
Yan, Dong,Li, Dong,Cheng, Guang,Yang, Zehui,Shi, Ling,Guo, Dongcai
, p. 849 - 859 (2015/08/24)
Seven novel coumarin derivatives derived from salicylaldehyde and phenol were synthesized and characterized by 1H NMR and 13C NMR spectra, mass spectra, infrared spectra and elemental analysis. Their corresponding Eu(III) complexes having general formula EuL1-7(NO3)3·2H2O were successfully prepared and characterized by elemental analysis, EDTA titrimetric, molar conductivity, UV-Vis, FT-IR and thermal performance studies. The luminescence properties, fluorescence quantum yields and the electrochemical properties of the title complexes were investigated. The results showed that the title complexes exhibited characteristic emissions of europium ions and possessed relatively good fluorescence quantum yields. The luminescence intensity of the complex with bromine-substituted group is the strongest among all the title complexes. The introduction of electron-withdrawing groups can increase the luminescence properties and fluorescence quantum yields, decrease the HOMO and LUMO energy levels of the title europium complexes, but electron-withdrawing group conversely. And these title complexes may possibly be useful for studying in luminescent materials field.
Synthesis and luminescence properties of pyrazolone derivatives and their terbium complexes
Xiao, Haihua,Jiang, Xi,Li, Dong,Wu, Limin,Zhang, Wu,Guo, Dongcai
, p. 677 - 685 (2015/12/04)
Seven novel pyrazolone derivatives were synthesized and characterized by 1H NMR and 13C NMR spectra, mass spectra, infrared spectra and elemental analysis. Their terbium complexes were prepared and characterized by elemental analysis, EDTA titrimetric analysis, UV/vis spectra, infrared spectra and molar conductivity, as well as thermal analysis. The fluorescence properties and fluorescence quantum yields of the complexes were investigated at room temperature. The results indicated that pyrazolone derivatives had good energy-transfer efficiency for the terbium ion. All the terbium complexes emitted green fluorescence characteristic of terbium ions, possessed strong fluorescence intensity, and showed relatively high fluorescence quantum yields. Cyclic voltammograms of the terbium complexes were studied and the highest occupied molecular orbital (HOMO) and lowest occupied molecular orbital (LUMO) energy levels of these complexes were estimated.
