63857-85-2Relevant academic research and scientific papers
Development of Novel (+)-Nootkatone Thioethers Containing 1,3,4-Oxadiazole/Thiadiazole Moieties as Insecticide Candidates against Three Species of Insect Pests
Cheng, Wanqing,Fan, Jiangping,Guo, Yong,Han, Meiyue,Ma, Nannan,Yan, Xiaoting,Yang, Ruige
, p. 15544 - 15553 (2022/01/03)
To improve the insecticidal activity of (+)-nootkatone, a series of 42 (+)-nootkatone thioethers containing 1,3,4-oxadiazole/thiadiazole moieties were prepared to evaluate their insecticidal activities against Mythimna separata Walker, Myzus persicae Sulzer, and Plutella xylostella Linnaeus. Insecticidal evaluation revealed that most of the title derivatives exhibited more potent insecticidal activities than the precursor (+)-nootkatone after the introduction of 1,3,4-oxadiazole/thiadiazole on (+)-nootkatone. Among all of the (+)-nootkatone derivatives, compound 8c (1 mg/mL) exhibited the best growth inhibitory (GI) activity against M. separata with a final corrected mortality rate (CMR) of 71.4%, which was 1.54- and 1.43-fold that of (+)-nootkatone and toosendanin, respectively; 8c also displayed the most potent aphicidal activity against M. persicae with an LD50 value of 0.030 μg/larvae, which was closer to that of the commercial insecticidal etoxazole (0.026 μg/larvae); and 8s showed the best larvicidal activity against P. xylostella with an LC50 value of 0.27 mg/mL, which was 3.37-fold that of toosendanin and slightly higher than that of etoxazole (0.28 mg/mL). Furthermore, the control efficacy of 8s against P. xylostella in the pot experiments under greenhouse conditions was better than that of etoxazole. Structure-activity relationships (SARs) revealed that in most cases, the introduction of 1,3,4-oxadiazole/thiadiazole containing halophenyl groups at the C-13 position of (+)-nootkatone could obtain more active derivatives against M. separata, M. persicae, and P. xylostella than those containing other groups. In addition, toxicity assays indicated that these (+)-nootkatone derivatives had good selectivity to insects over nontarget organisms (normal mammalian NRK-52E cells and C. idella and N. denticulata fries) with relatively low toxicity. Therefore, the above results indicate that these (+)-nootkatone derivatives could be further explored as new lead compounds for the development of potential eco-friendly pesticides.
Synthesis, antifungal activity and 3D-QSAR study of novel nopol-based 1,3,4-thiadiazole–thioether compounds
Wang, Xiu,Duan, Wen-Gui,Lin, Gui-Shan,Chen, Ming,Lei, Fu-Hou
, p. 4029 - 4049 (2021/06/21)
A series of novel nopol derivatives containing 1,3,4-thiadiazole–thioether moiety were synthesized from β-pinene, which is a natural, abundant and renewable biomass resource. Their structures were characterized by FT-IR, 1H NMR, 13C NMR, ESI–MS and elemental analysis. In vitro antifungal activity of the target compounds was preliminarily evaluated against eight tested plant pathogens, including Fusarium oxysporum f. sp. cucumerinum, Cercospora arachidicola, Physalospora piricola, Alternaria solani, Gibberella zeae, Rhizoeotnia solani, Bipolaris maydis and Colleterichum orbicalare. The bioassay results revealed that, at the concentration of 50?μg/mL, all the target compounds showed certain inhibition activity against the eight tested fungi. Compounds 5f (R = m–OCH3), 5i (R = m–F) and 5r (R = m–I) had excellent inhibition rates of 77.8%, 88.9% and 77.8%, respectively, against P. piricola, showing much better antifungal activity than that of the positive control chlorothalonil. Meanwhile, compound 5?m (R = p–Cl) displayed antifungal activity of 80.7% against R. solani. Furthermore, the analysis of three-dimensional quantitative structure–activity relationship (3D-QSAR) was performed for the relationship between the structures of the target compounds and their antifungal activity against P. piricola by CoMFA method. A reasonable CoMFA model (n = 6; q2 = 0.597; r2 = 0.985) was established.
Efficient formation of C–S bond using heterocyclic thiones and arynes
An, Yu,Xu, Gang,Cai, Menglu,Wang, Shihui,Wang, Xiao zhong,Chen, Yingqi,Dai, Liyan
, (2020/12/23)
Phenylthio heterocyclic compounds are widely used because of their diverse biological activities and medicinal prospects. Here, a facile method was reported. An arylation of 1,3,4-oxa(thia)diazol-2-thiones reacting with arynes to build C(aryl)-S bonds in the presence of CsF had good yields and excellent selectivity. The reaction was completed in short time without using expensive reagents and catalysts. Present reaction system is an efficient procedure to process phenylthio heterocyclic compounds and reveals a sustainable method and better application prospects in future organic synthesis.
Synthesis of [1,2,4]triazolo[4,3-a]quinoxaline-1,3,4-oxadiazole derivatives as potent antiproliferative agents via a hybrid pharmacophore approach
Kaneko, Daiki,Ninomiya, Masayuki,Yoshikawa, Rina,Ono, Yukari,Sonawane, Amol D.,Tanaka, Kaori,Nishina, Atsuyoshi,Koketsu, Mamoru
, (2020/10/06)
Imiquimod (1-isobutyl-1H-imidazo[4,5-c]quinolin-4-amine) is efficacious in topical therapy for certain types of skin cancers. Structurally similar EAPB0203 (N-methyl-1-(2-phenethyl)imidazo[1,2-a]quinoxalin-4-amine) has been shown higher in vitro potency than imiquimod. Besides, triazole, oxadiazole, and thiadiazole rings are privileged building blocks in drug design. A series of [1,2,4]triazolo[4,3-a]quinoxaline-1,3,4-oxadiazole and [1,2,4]triazolo[4,3-a]quinoxaline-1,3,4-thiadiazole derivatives were therefore synthesized by incorporation of these rings into the structure of EAPB0203 and assessed their antiproliferative effects against various cancer cell lines. The 1,3,4-oxadiazole derivatives demonstrated the superior effectiveness compared to imiquimod and EAPB0203. Our findings highlight the excellent potential of [1,2,4]triazolo[4,3-a]quinoxaline-1,3,4-oxadiazole derivatives as anticancer agents.
Synthesis and biological evaluation of novel disulfides incorporating 1,3,4-thiadiazole scaffold as promising antitumor agents
Li, Sha,Wang, Hai-Xin,Liu, Hai-Ying,Jing, Fen,Fu, Xiao-Yun,Li, Cai-Wen,Shi, Yan-Ping,Chen, Bao-Quan
, p. 1502 - 1508 (2019/07/30)
In the present study, fourteen 2,5-disubstituted 1,3,4-thiadiazole derivatives containing disulfide group were prepared. The resulting compounds 7a–7n were identified by IR, NMR, MS, and elemental analysis. Their antiproliferative properties in vitro were studied employing standard CCK-8 assay against SMMC-7721, MCF-7, and A549 lines. Bioassay indicated that some compounds showed stronger antitumor effects than reference drugs PX-12 and 5-fluorouracil. Among these screened compounds, compound 7h showed excellent biological activities in inhibiting SMMC-7721 cell proliferation with IC50 at 1.93 ± 0.08 μM. Compounds 7k and 7i manifested highly effective growth inhibitory activity versus MCF-7 cells, with IC50 at 3.04 ± 0.09 and 3.54 ± 0.17 μM, respectively. For A549 cells, compound 7m was found to have the highest antitumor potency with IC50 at 3.67 ± 0.13 μM.
1,2,4-TRIAZOLE, 1,3,4-OXADIAZOLE, AND 1,3,4-THIADIAZOLE DERIVATIVES AND THEIR ANTIMYCOBACTERIAL ACTIVITY
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Paragraph 053, (2016/07/27)
Disclosed herein are novel five membered heterocyclic compounds of Formula (I) wherein, X is S or SO2; n is 0, 1; m is1 or 2; Y is N, O or S; R2 independently represents H or alkyl or halo selected from -CI, -F; or -CF3, or -OH or-NH2 or - NO2; and R1 independently represents H or C1 to C5 straight or branched chain alkyl, alkenyl, alkynyl or a group -(CH2)5Br or pyrrolidine or - NHR' wherein R' is H or isopropyl or (II) or (III) which selectively act against dormant pathogenic tuberculi bacilli and exhibit antiproliferative activities and for treatment of a disease or disorder associated with GroEL1/GroEL2 activity. The invention relates to a process for preparation of novel five membered heterocyclic compounds of Formula I and to pharmaceutical compositions thereof.
Development of 3,5-Dinitrobenzylsulfanyl-1,3,4-oxadiazoles and Thiadiazoles as Selective Antitubercular Agents Active Against Replicating and Nonreplicating Mycobacterium tuberculosis
Karabanovich, Galina,Zemanová, Júlia,Smutny, Tomá?,Székely, Rita,?arkan, Michal,Centárová, Ivana,Vocat, Anthony,Pávková, Ivona,?onka, Patrik,Něme?ek, Jan,Stola?íková, Ji?ina,Vejsová, Marcela,Vávrová, Kate?ina,Klime?ová, Věra,Hrabálek, Alexandr,Pávek, Petr,Cole, Stewart T.,Miku?ová, Katarína,Roh, Jaroslav
, p. 2362 - 2380 (2016/04/09)
Herein, we report the discovery and structure-activity relationships of 5-substituted-2-[(3,5-dinitrobenzyl)sulfanyl]-1,3,4-oxadiazoles and 1,3,4-thiadiazoles as a new class of antituberculosis agents. The majority of these compounds exhibited outstanding in vitro activity against Mycobacterium tuberculosis CNCTC My 331/88 and six multidrug-resistant clinically isolated strains of M. tuberculosis, with minimum inhibitory concentration values as low as 0.03 μM (0.011-0.026 μg/mL). The investigated compounds had a highly selective antimycobacterial effect because they showed no activity against the other bacteria or fungi tested in this study. Furthermore, the investigated compounds exhibited low in vitro toxicities in four proliferating mammalian cell lines and in isolated primary human hepatocytes. Several in vitro genotoxicity assays indicated that the selected compounds have no mutagenic activity. The oxadiazole and thiadiazole derivatives with the most favorable activity/toxicity profiles also showed potency comparable to that of rifampicin against the nonreplicating streptomycin-starved M. tuberculosis 18b-Lux strain, and therefore, these derivatives, are of particular interest.
Antibacterial activities against rice bacterial leaf blight and tomato bacterial wilt of 2-mercapto-5-substituted-1,3,4-oxadiazole/thiadiazole derivatives
Li, Pei,Shi, Li,Gao, Man-Ni,Yang, Xia,Xue, Wei,Jin, Lin-Hong,Hu, De-Yu,Song, Bao-An
, p. 481 - 484 (2015/02/18)
In this study, a series of 2-mercapto-5-substituted-1,3,4-oxadiazole/thiadiazole derivatives were synthesized and evaluated for their antibacterial activities against rice bacterial leaf blight and tomato bacterial wilt caused by Xanthomonas oryzae pv. oryzae (Xoo) and Ralstonia solanacearum (R. solanacearum) via the turbidimeter test in vitro. Antibacterial bioassays indicated that most compounds demonstrated appreciable antibacterial bioactivities against Xoo and R. solanacearum. Among the title compounds, compound 4i demonstrated the best inhibitory effect against Xoo and R. solanacearum with half-maximal effective concentration (EC50) values of 14.69 and 15.14 μg/mL, respectively, which were even better than those of commercial agents Bismerthiazol and Thiodiazole Copper. In vivo antibacterial activities tests under greenhouse conditions revealed that the control efficiency of compound 4i against rice bacterial leaf blight and tobacco bacterial wilt were better than those of Bismerthiazol and Thiodiazole Copper. Meanwhile, field trials also indicated that compound 4i demonstrated appreciable control efficiency against rice bacterial leaf blight and tomato bacterial wilt.
Synthesis and antiviral activity of 5-(4-chlorophenyl)-1,3,4- thiadiazole sulfonamides
Chen, Zhuo,Xu, Weiming,Liu, Keming,Yang, Song,Fan, Huitao,Bhadury, Pinaki S.,Hu, De-Yu,Zhang, Yuping
, p. 9046 - 9056 (2011/03/19)
Starting from 4-chlorobenzoic acid, 10 new 5-(4-chlorophenyl)-N- substituted-N- 1,3,4-thiadiazole-2-sulfonamide derivatives were synthesized in six-steps. Esterification of 4-chlorobenzoic acid with methanol and subsequent hydrazination, salt formation and cyclization afforded 5-(4-chlorophen-yl)-1,3, 4-thiadiazole-2-thiol (5). Conversion of this intermediate into sulfonyl chloride 6, followed by nucleophilic attack of the amines gave the title sulfonamides 7a-7j whose structures were confirmed by NMR, IR and elemental analysis. The bioassay tests showed that compounds 7b and 7i possessed certain antitobacco mosaic virus activity.
Green synthesis of 5-substituted-1,3,4-thiadiazole-2-thiols as new potent nitrification inhibitors [1]
Saha, Ajoy,Kumar, Rajesh,Kumar, Rajendra,Devakumar
experimental part, p. 838 - 845 (2010/10/04)
(Chemical Equation Presented) A fast, efficient synthesis of 5-substituted-1,3,4-thiadiazole-2-thiols was successfully developed, assessed using green chemistry matrices, and compounds were screened for their in vitro nitrification inhibitory activity. The greener method was superior with higher energy efficiency, E(nvironmental) factor, atom economy, atom efficiency, carbon efficiency, and reaction mass efficiency.
