1878-94-0Relevant articles and documents
Method for synthesizing 4-iodophenoxyacetic acid
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Paragraph 0017-0022, (2019/03/09)
The invention discloses a method for synthesizing 4-iodophenoxyacetic acid. The method comprises the following steps: 1) dissolving phenyloxyacetic acid and sodium iodide in an aqueous methanol solution, carrying out stirring and maintaining a temperature at 25-30 DEG C; 2) adding an aqueous sodium hypochlorite solution at 25-30 DEG C under stirring; 3) carrying out heating to 30-36 DEG C after completion of addition and performing a stirring reaction for 1-2 h; 4) distilling off methanol, then carrying out cooling to room temperature, adjusting a pH value to 2-3 and allowing 4-iodophenoxyacetic acid to be precipitated; and 5) carrying out cooling to 10 DEG C, performing standing for 0.5-1 h, and then carrying out filtering, washing with cold water and drying to obtain finished 4-iodophenoxyacetic acid. According to the method of the invention, in the aqueous methanol solution, phenoxyacetic acid and sodium iodide are as substrates and sodium hypochlorite is dropwise added to prepare 4-iodophenoxyacetic acid; reaction conditions are moderate; yield is as high as 94.6%; and raw materials are cheap and easily available and has low toxicity.
Finding new elicitors that induce resistance in rice to the white-backed planthopper Sogatella furcifera
He, Xingrui,Yu, Zhaonan,Jiang, Shaojie,Zhang, Peizhi,Shang, Zhicai,Lou, Yonggen,Wu, Jun
supporting information, p. 5601 - 5603 (2015/11/17)
Herein we report a new way to identify chemical elicitors that induce resistance in rice to herbivores. Using this method, by quantifying the induction of chemicals for GUS activity in a specific screening system that we established previously, 5 candidate elicitors were selected from the 29 designed and synthesized phenoxyalkanoic acid derivatives. Bioassays confirmed that these candidate elicitors could induce plant defense and then repel feeding of white-backed planthopper Sogatella furcifera.
Synthesis and fluorescence properties of 1,2,4-triazolo[3,4-b]-1,3,4-thiadiazol derivatives and their terbium complexes
Zhang, Wu,Chai, Yuchao,Li, Kangyun,Chen, Yanwen,Yan, Dong,Guo, Dongcai
, p. 1113 - 1122 (2015/02/19)
Eight novel 1,2,4-triazolo[3,4-b]-1,3,4-thiadiazol derivatives have been designed and synthesized, and their corresponding Tb3+ complexes were also prepared successfully. The fluorescence properties and fluorescence quantum yields of the target complexes were investigated, the results showed that the ligands were an efficient sensitizer for Tb3+ luminescence, and the target complexes exhibited characteristic fluorescence emissions of Tb3+ ion. The fluorescence intensity of the complex substituted by chlorine was stronger than that of other complexes. The substituents' nature has a great effect upon the electrochemical properties of the target complexes. The results showed that the introduction of the electron-withdrawing groups tended to decrease the oxidation potential and highest occupied molecular orbital energy levels of the target Tb3+ complexes; however, introduction of the electron-donating groups can increase the corresponding complexes' oxidation potential and highest occupied molecular orbital energy levels.