68468-96-2Relevant articles and documents
Efficient Synthesis of Fluorinated [1,2,4]Triazolo[3,4-b][1,3,4]thiadiazoles
Dhotre, B. K.,Jagrut, V. B.,Pathan, M. A.,Patharia, M. A.,Raut, S. V.
, p. 1135 - 1140 (2021/09/08)
Abstract: An efficient synthesis of fluorinated [1,2,4]triazolo[3,4-b][1,3,4]thiadiazole derivatives has been achievedby cyclocondensation of 5-substituted 4-amino-1,2,4-triazole-3-thiols withfluoro-substituted aromatic acids using phosphoryl chloride as a cyclizingagent. The synthesized compounds were characterized by spectroscopic techniques,including IR, 1H NMR, and mass spectra.
Synthesis and biological evaluation of novel glycosyl-containing 1,2,4-triazolo[3,4-b][1,3,4]thiadiazole derivatives as acetylcholinesterase inhibitors
Liu, Xiu-Jian,Wang, Lei,Yin, Long,Cheng, Feng-Chang,Sun, Hui-Min,Liu, Wei-Wei,Shia, Da-Hua,Caoa, Zhi-Ling
, p. 571 - 575 (2017/11/14)
An efficient protocol for the synthesis of novel glycosyl-containing 1,2,4-triazolo[3,4-b][1,3,4]thiadiazole derivatives starting from the commercially available d-glucosamine hydrochloride is described by reaction of glycosyl isothiocyanate with various aminotriazoles in DMF. Glycosyl isothiocyanate is an important intermediate and synthetic methods are discussed. The acetylcholinesterase inhibitory activity of these compounds was tested by Ellman’s method. It was found that most compounds exhibited over 90% inhibition and they were subsequently evaluated for their IC50values.
Synthesis and biological activities of 3,6-disubstituted-1,2,4-triazolo-1,3,4-thiadiazole derivatives
Lin, Lu,Liu, Hua,Wang, Dun-Jia,Hu, Yan-Jun,Wei, Xian-Hong
, p. 481 - 489 (2018/02/06)
Twelve novel triazolothiadiazole derivatives were synthesized from 4-amino-5-substituted-4H-1,2,4-triazole-3-thiols with various aromatic carboxylic acids by cyclization in the presence of phosphorous oxychloride. All the newly synthesized compounds were characterized by FTIR, 1H NMR, mass spectroscopy and elemental analysis. The antimicrobial activities of the title compounds were examined by disc diffusion method against Escherichia coli, Staphylococcus aureus, Pyricularia oryzae and Rhizoctnia solani. The bioassay indicated all synthesized triazolothiadiazole derivatives possessed moderate to good antibacterial and antifungal activities against the tested organisms. Especially, compounds 2e and 2k exhibited excellent antibacterial and antifungal activities among these triazolothiadiazole derivatives.
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.
Facile synthesis of new 10-substituted-5H-naphtho[1,2-e][1,2,4]triazolo[3,4-b][1,3,4]thiadiazin-5-ones
Khalafy, Jabbar,Mohammadlou, Mahsa,Mahmoody, Miri,Salami, Fatemeh,Poursattar Marjani, Ahmad
, p. 1528 - 1530 (2015/03/14)
The reaction of 2-bromo-1,4-naphthoquinone with 4-amino-5-aryl-4H-1,2,4-triazole-3-thiols in ethanol at 50 °C gave the corresponding 2-[(4-amino-5-aryl-4H-1,2,4-triazol-3-yl)thio]naphthalene-1,4-diones. Their treatment with EtOH/HCl under reflux conditions produced 10-substituted-5H-naphtho[1,2-e][1,2,4]triazolo[3,4-b][1,3,4]thiadiazin-5-ones through intramolecular cyclization.
Synthesis and Biological Evaluation of Kojic Acid Derivatives Containing 1,2,4-triazole as Potent Tyrosinase Inhibitors
Xie, Wenlin,Zhang, Jingai,Ma, Xiaojing,Yang, Wenqian,Zhou, Ying,Tang, Xufu,Zou, Yan,Li, Hui,He, Jingjing,Xie, Shimin,Zhao, Yunhui,Liu, Fengping
, p. 1087 - 1092 (2015/10/28)
A series of 5-substituted-3-[5-hydroxy-4-pyrone-2-yl-methymercapto]-4-amino-1,2,4-triazole derivatives were synthesized by nucleophilic substitution reaction of 5-hydroxy-2-chloromethyl -4H-pyran-4-one with 5-substituted-3-mercapto-4-amino-1,2,4-triazole,
Synthesis and evaluation of novel azoles as potent antifungal agents
Li, Liangjing,Ding, Hao,Wang, Baogang,Yu, Shichong,Zou, Yan,Chai, Xiaoyun,Wu, Qiuye
, p. 192 - 194 (2014/01/17)
Using a rational approach to the design of antifungal agents, a series of azole agents with 1,3,4-oxadiazole side chains were designed and synthesized. The results of preliminary in vitro antifungal tests with eight human pathogenic compounds showed that all of the title compounds exhibited excellent activities against all of the tested fungi except Aspergillus fumigatus. Compounds 11e and 11f were found to be the most effective, with a minimum inhibitory concentration of 0.0039 μg/mL, followed by voriconazole, which has a MIC of 0.0625 μg/mL. The 1,3,4-oxadiazole side chain is not the major contributor but plays a role in eliciting the observed antifungal activity.
Synthesis and biological activities of some new 3,6-disubstituted 1,2,4-triazolo[3,4-b]1,3,4-thiadiazole derivatives
Rafiq, Muhammad,Saleem, Muhammad,Hanif, Muhammad,Maqsood, Muhammad Rizwan,Rama, Nasim Hasan,Lee, Ki-Hwan,Seo, Sung-Yum
, p. 3943 - 3949 (2013/08/23)
A series of aromatic hydrazides 3a-j were prepared by refluxing esters 2a-j with hydrazine hydrate in methanol, which were prepared by the esterification of 1a-j. Acetohydrazides 3a-j upon treatment with carbon disulfide and methanolic potassium hydroxide yielded potassium dithiocarbazate salts 4a-j, which on refluxing with hydrazine hydrate yielded substituted 4-amino-5-aryl-3H-1,2,4-triazole-3-thiones 5a-j. The target compounds 6a-j were synthesized by condensing furan-3-carboxylic acid in the presence of polyphosphoric acid under reflux. The structures of newly synthesized compounds were characterized by IR, 1H NMR, 13C NMR, elemental analysis and mass spectrometric studies. All the synthesized compounds were screened for their urease, acetylcholine esterase inhibition, antioxidant and alkaline phosphatase inhibition activity. Almost all of the compounds 6a-j showed good to excellent activities against urease and acetylcholine esterase more than the reference drugs. Compounds 6f and 6g were more potent scavenger of free radicals than the reference n-propyl gallate. Compound 6b and 6h showed excellent activities of alkaline phosphatase as compare to the reference KH 2PO4.
Some pyridyl- and thiophenyl- Substituted 1,2,4-triazolo[3,4-b]1,3,4- thiadiazole derivatives as potent antibacterial
Maqsood, Muhammad Rizwan,Hanif, Muhammad,Rafiq, Muhammad,Saleem, Muhammad,Zaib, Sumera,Khan, Aftab Ahmed,Iqbal, Mazhar,Iqbal, Jamshed,Rama, Nasim Hasan,Seo, Sung-Yum,Lee, Ki-Hwan
, p. 4180 - 4184 (2013/08/23)
The target compounds 6-11a-e were synthesized by condensing 4-amino-5-aryl-3H-1,2,4-triazole-3-thiones 5a-f with various aromatic carboxylic acids in the presence of phosphorous oxychloride. The structures of newly synthesized compounds were characterized by IR, 1H NMR, 13C NMR, elemental analysis and mass spectrometric studies. All the synthesized compounds were screened for their antibacterial activity. Almost all the tested compounds were potent against four different strains of bacteria when compared with that of reference drug ciprofloxacin. Compounds 6c, 6e, 8d, 9b, 9e, 11a and 11b showed nearly equal or lower MIC values than standard drug, against all four tested bacterial strains but rest of the compounds showed excellent antibacterial activities.
Synthesis and antihyperlipidemic activity of some novel 4-(substitutedamino)-5-substituted-3-mercapto-(4H)-1,2,4-triazoles
Chhabria, Mahesh T.,Suhagia, Bhanubhai N.,Brahmkshatriya, Pathik S.,Raval, Priyesha M.
, p. 452 - 457 (2012/06/16)
Hyperlipidemia is considered one of the key factors for cardiovascular diseases. Based on earlier work on a series of 5-alkyl-4-aryl-3-mercapto-(4H)-1, 2,4-triazoles, for further lead modification, a series of 4-(substituted)amino- 5-substituted-3-mercapto-(4H)-1,2,4-triazoles was designed. Target compounds were synthesized by the well known Hoggarth synthesis of substituted 1,2,4-triazoles. Synthesized compounds were screened for lipid lowering activity using the "Poloxamer 407 induced hyperlipidemia in rats" model at a dose of 100 mg/kg p. o. Compounds were found to alter serum lipid levels significantly. Most of the compounds significantly reduced serum cholesterol and triglyceride levels. Some of the compounds were found to reduce triglycerides and elevate high density lipoprotein (HDL) levels more than the standard drug atorvastatin (CAS 134523-03-8). Compounds with chloro substitution on aryl rings were found more active in reducing serum lipid levels than other substitutions. ECV ? Editio Cantor Verlag.
