29203-59-6Relevant articles and documents
Site selective synthesis and anti-inflammatory evaluation of Spiro-isoxazoline stitched adducts of arteannuin B
Ur Rasool, Javeed,Sawhney, Gifty,Shaikh, Majeed,Nalli, Yedukondalu,Madishetti, Sreedhar,Ahmed, Zabeer,Ali, Asif
, (2021/10/16)
A library of new spiroisoxazoline analogues of arteannuin B was synthesized through 1, 3-dipolar cycloaddition in stereoselective fashion and consequently screened for anti-inflammatory activity in RAW 264.7 macrophage cells. Three potent analogues (8i, 8 m, and 8n) were found to attenuate the LPS induced release of cytokines IL-6 and TNF-α more potently than the parent molecule. Also, the inhibition of LPS induced nitric oxide production in these cells show moderate to high efficacy. None of the three potent molecules have altered the viability of RAW 264.7 cells following 48 h incubation suggesting that the inhibition of cytokines and nitric oxide production exhibited in the cells was not due to toxicity. In addition, these compounds exhibit an IC50 range of 0.17 μM-1.57 μM and 0.09 μM-0.35 μM for the inhibition of IL-6 release and nitric oxide production respectively. The results disclose potent inhibition of pro-inflammatory mediators which are encouraging and warrant further investigations to develop new therapeutic agents for inflammatory diseases.
Design and synthesis of sinomenine isoxazole derivatives via 1,3-dipolar cycloaddition reaction
Pan, Hongmei,Lu, Tong,Wu, Xuedan,Gu, Chengwen,Tao, Naili,Zhang, Biao,Wang, Ao,Chen, Guangmei,Zhang, Kehua,Cheng, Jie,Jin, Jie
supporting information, p. 2360 - 2364 (2019/11/11)
A novel structure of sinomenine isoxazole derivatives is synthesised from sinomenine hydrochloride and aromatic aldehydes and requires six steps. 19 target compounds have been obtained in good yields. The sinomenine hydrochloride transforms to 4-alkynyl sinomenine, which is a key intermediate product to synthesise the target sinomenine isoxazole compounds, after a neutralisation reaction with ammonia and substitution reaction with 3-chloropropyne. Another key intermediate product is 1,3-dipole, which can be obtained from aromatic aldehyde. After treatment with hydroxylamine hydrochloride and then sodium carbonate solution, aromatic aldehyde is converted to aldehyde oxime, which reacts with N-chlorosuccinimide (NCS) to afford aryl hydroximino chloride. 1,3-Dipole is eventually formed in situ while triethylamine (TEA) in DMF is added dropwise. Then 4-alkynyl sinomenine is added to provide the sinomenine isoxazole derivative via 1,3-dipolar cycloaddition reaction as the key step. All the target compounds are characterised by melting point, 1H NMR, 13C NMR, HRMS and FT-IR spectroscopy.
Design, synthesis, in vitro and in silico evaluation of new 3-phenyl-4,5-dihydroisoxazole-5-carboxamides active against drug-resistant mycobacterium tuberculosis
Gaikwad, Nikhil Baliram,Afroz, Pathan,Ahmad, Mohammad Naiyaz,Kaul, Grace,Shukla, Manjulika,Nanduri, Srinivas,Dasgupta, Arunava,Chopra, Sidharth,Yaddanapudi, Venkata Madhavi
, (2020/11/24)
A new series of 3-phenyl-4,5-dihydroisoxazole-5-carboxamides were designed, synthesized, and evaluated for their potency against Mtb H37Rv. Designed molecules were synthesized by one-pot cycloaddition reaction in good to excellent yields. Anti-Tubercular evaluation of all synthesized derivatives identified 6k to be highly potent (MIC 1 μg/mL) against Mtb and drug-resistant strains. All potent derivatives were found to be non-toxic when tested against Vero cells. Also, in silico studies were employed to explore the binding patterns of designed compounds to target Mycobacterial membrane protein Large-3. All derivatives exhibited excellent binding patterns with the receptor. The excellent in silico Absorption, Distribution, Metabolism, and Excretion properties and druggability parameters positions these molecules as promising lead candidates for the future development of new drugs to treat drug-resistant Tuberculosis.
Dibenzazepine-linked isoxazoles: New and potent class of α-glucosidase inhibitors
Umm-E-Farwa,Ullah, Saeed,Khan, Maria Aqeel,Zafar, Humaira,Atia-tul-Wahab,Younus, Munisaa,Choudhary, M. Iqbal,Basha, Fatima Z.
supporting information, (2021/05/10)
α-Glucosidase inhibition is a valid approach for controlling hyperglycemia in diabetes. In the current study, new molecules as a hybrid of isoxazole and dibenzazepine scaffolds were designed, based on their literature as antidiabetic agents. For this, a series of dibenzazepine-linked isoxazoles (33–54) was prepared using Nitrile oxide-Alkyne cycloaddition (NOAC) reaction, and evaluated for their α-glucosidase inhibitory activities to explore new hits for treatment of diabetes. Most of the compounds showed potent inhibitory potency against α-glucosidase (EC 3.2.1.20) enzyme (IC50 = 35.62 ± 1.48 to 333.30 ± 1.67 μM) using acarbose as a reference drug (IC50 = 875.75 ± 2.08 μM). Structure-activity relationship, kinetics and molecular docking studies of active isoxazoles were also determined to study enzyme-inhibitor interactions. Compounds 33, 40, 41, 46, 48–50, and 54 showed binding interactions with critical amino acid residues of α-glucosidase enzyme, such as Lys156, Ser157, Asp242, and Gln353.
Toxicities of 4,5-Dihydroisoxazoles against Root-Knot Nematodes and in Silico Studies of Their Modes of Action
Fráguas, Rodrigo M.,Costa, Viviane A.,Terra, Willian C.,Aguiar, Alcino P.,Martins, Samuel J.,Campos, Vicente P.,Oliveira, Denilson F.
, p. 523 - 529 (2020/02/18)
The present work sought to contribute to the development of new nematicides. Benzaldehydes were initially converted to nitrile oxides that underwent 1,3-dipolar cycloaddition reactions with methyl acrylate to generate 4,5-dihydroisoxazoles. In in vitro te
Triazole alcohol derivative as well as preparation method and application thereof
-
Paragraph 0135; 0137, (2020/03/11)
The invention relates to a triazole alcohol derivative as well as a preparation method and application thereof. The chemical structure of the triazole alcohol derivative is shown as a formula I, R1 represents a benzene ring or a substituted benzene ring, and substituent groups of the substituted benzene ring can be located at all positions of the benzene ring, can be mono-substituted or multi-substituted, and can be selected from a) halogen which is F and Cl; b) an electron withdrawing group which is cyano or trifluoromethyl; c ) a lower alkyl of 1-4 carbon atoms or a halogen substituted loweralkyl; and d) lower alkoxy of 1-4 carbon atoms or halogen substituted lower alkoxy. The compound of the invention has strong antifungal activity, has the advantages of low toxicity, wide antibacterial spectrum and the like, and can be used for preparing antifungal drugs.
Design, synthesis, and in vitro evaluation of novel triazole analogues featuring isoxazole moieties as antifungal agents
Chai, Xiaoyun,Ding, Zichao,Hao, Yumeng,Jiang, Yuanying,Jin, Yongsheng,Ni, Tingjunhong,Wang, Ruilian,Wang, Ruina,Wang, Ting,Xie, Fei,Yu, Shichong,Zhang, Dazhi
supporting information, (2020/06/17)
In order to develop novel antifungal agents, based on our previous work, a series of (2R,3R)-3-((3-substitutied-isoxazol-5-yl)methoxy)-2-(2,4-difluorophenyl)-1-(1H-1,2,4-triazol-1-yl) butan-2-ol (a1-a26) were designed and synthesized. All of the compounds exhibited good in vitro antifungal activities against eight human pathogenic fungi. Among them, compound a6 showed excellent inhibitory activity against Candida albicans and Candida parasilosis with MIC80 values of 0.0313 μg/mL. In addition, compounds a6, a9, a12, a13 and a14 exhibited moderate inhibitory activities against fluconazole-resistant isolates with MIC80 values ranging from 8 μg/mL to 16 μg/mL. Furthermore, compounds a6, a12 and a23 exhibited low inhibition profiles for CYP3A4. Clear SARs were analyzed, and the molecular docking experiment was carried out to further investigate the relationship between a6 and the target enzyme CYP51.
Discovery of Natural Product-Based Fungicides (II): Semisynthesis and Biological Activity of Sarisan Attached 3-Phenylisoxazolines as Antifungal Agents
Liu, Zhiyan,Cao, Jiangping,Yan, Xiaoting,Cheng, Wanqing,Wang, Xiaoguang,Yang, Ruige,Guo, Yong
, (2020/12/09)
Many phytopathogenic fungi cause severe damage to crop yields. In continuation of our research aimed at the discovery and development of natural products-based fungicides, a series of thirty-one sarisan attached 3-phenylisoxazolines were synthesized and evaluated for their antifungal activities against five phytopathogenic fungi (B. cinerea, C. lagenarium, A. solani, F. solani, and F. graminearum). Among all title sarisan derivatives, compounds IV2, IV14 and IV23 showed potent antifungal activity against some phytopathogenic fungi. In particular, compound IV2 exhibited a broad-spectrum and more potent antifungal activity against A. solani, F. solani, and F. graminearum than the commercial fungicide Hymexazol. In addition, compounds IV2, IV14 and IV23 also displayed relative low toxicity on normal NRK-52E cells. This work will give some insights into the development of sarisan derivatives as new fungicide candidates in plant protection.
Substituent effect study on the experimental 13C NMR chemical shifts of 3-(substituted phenyl)-3a,4,8,8a-tetrahydro-1,3-dioxepino[5,6-d] [1,2] isoxazoles
Kara, Yesim S.,Yalduz, Sümeyye
, p. 158 - 165 (2019/05/22)
Novel heterocyclic derivatives containing isoxazole ring were synthesized by the 1,3-dipolar cycloaddition reaction of substituted nitrile oxides with cis-4,7-dihydro-1,3-dioxepin in the present study. These 3-(substituted phenyl)-3a,4,8,8a-tetrahydro-1,3
Synthesis and biological activity of ethyl 2-(5-methyl-3-arylisoxazole-4-carboxamido)-4-alkylthiazole-5-carboxylate
Wang, Wei,Wang, Lie-Ping,Mao, Min-Zhen,Zhang, Xiao-Guang,Zheng, Xiao-Rui,Huang, Xiao-Ying,Xue, Chao,Ning, Bin-Ke
, p. 164 - 167 (2017/11/20)
A series of novel ethyl 2-(5-methyl-3-arylisoxazole-4-carboxamido)-4-alkylthiazole-5-carboxylates I-1-6 were synthesized. The structures of all target compounds were characterized by 1H NMR, 13C NMR, IR,MS and elemental analyses. Their fungicidal and herbicidal activities were evaluated. The results of preliminary bioassays show that the title compounds I-4 possess 20-50% inhibition against most of the tested plants at the dosage of 150 g ai/ha, while the title compounds I-1-5 possess 32-58% inhibition against FusaHum graminearum, Thanatephorus cucumeris, Botrytis cinereapers and Fusarium oxysporum in vitro at the concentration of 100 mg/L.