29638-33-3Relevant articles and documents
A new colorimetric chemosensor based on 1,3,4-oxadiazole derivative for the high selectivity and sensitivity of Fe3+ ion detection
Alorabi, Ali Q.
, (2021/12/10)
This paper reports the development of new iron chemosensor, 2-(5-sulfanyl-1,3,4-oxadiazol-2-yl) phenol (HL). The structural properties of HL were confirmed by FTIR, 1H NMR, 13C NMR and ESI–MS techniques. The sensor was applied for detection of various metal ions in DMF/H2O (1:9 v/v) medium. The results revealed an instant color change of Fe3+ solution from yellow to black. However, white and light brown precipitates were observed in the case of Pb2+, Hg2+ and Cu2+, respectively, whereas no optical response for the other cations were detected. Beside its high selectivity for Fe3+, no interference from other co-existed ions was seen. Moreover, the detection limit (LOD) of 3 μM, which is less than the acceptable value of the Fe3+ from WHO in environment, was observed. The interaction between Fe3+ ions and HL sensor using Job's plot analysis was found to be a 1:1 binding stoichiometry with a binding constant of 1.8 × 103 M?1 as calculated using Benesi–Hilderbrand equation. The advantage of HL in propping of Fe3+in real environmental samples were also tested which revealed its practical applicability as an effective chemosensor.
Pleuromutilin derivative with 1, 3, 4-oxadiazole side chain and preparation and application thereof
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Paragraph 0055-0056; 0070; 0090; 0094; 0095; 0103, (2021/07/24)
The invention belongs to the field of medicinal chemistry, and particularly relates to a pleuromutilin derivative with a 1, 3, 4-oxadiazole side chain and preparation and application thereof The pleuromutilin derivative with the 1, 3, 4-oxadiazole side chain is a compound shown in a formula 2 or a pharmaceutically acceptable salt thereof, and a solvent compound, an enantiomer, a diastereoisomer and a tautomer of the compound shown in the formula 2 or the pharmaceutically acceptable salt thereof or a mixture of the solvent compound, the enantiomer, the diastereoisomer and the tautomer in any proportion, including a racemic mixture. The pleuromutilin derivative has good antibacterial activity, is especially suitable for being used as a novel antibacterial agent for systemic system infection of animals or human beings, and has good water solubility.
1, 3, 4-oxadiazole-2 (3H)-thioketone-norfloxacin heterozygote and preparation method and application thereof
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Paragraph 0038-0041, (2021/04/03)
The invention discloses a 1, 3, 4-oxadiazole-2 (3H)-thioketone-norfloxacin heterozygote and a preparation method and application thereof, and the structural formula of the 1, 3, 4-oxadiazole-2 (3H)-thioketone-norfloxacin heterozygote is shown as a formula