23-Sep-2021 News Extracurricular laboratory: Synthetic route of 20780-72-7

Formula: C8H4BrNO2, Having gained chemical understanding at molecular level, chemistry graduates may choose to apply this knowledge in almost unlimited ways, as it can be used to analyze all matter and therefore our entire environment.

Formula: C8H4BrNO2, Having gained chemical understanding at molecular level, chemistry graduates may choose to apply this knowledge in almost unlimited ways, as it can be used to analyze all matter and therefore our entire environment.

Take 4-bromoindole dione 2.0g (8.85mmol) into a 25mL round bottom flask, add 5mL N, N-dimethylformamide, was added with stirringK2CO3 3.66g (26.5mmol), and finally added methyl iodide (10.6mmol) at room temperature for 4h.After completion of the TLC detection reaction, 15 mL of water was added to the reaction solution, which was extracted with dichloromethane. The combined organic phases were dried over anhydrous sodium sulfate,Using developing solvent petroleum ether: ethyl acetate = 5: 1,200-300 mesh silica gel column chromatography to give 2.8 g of 1-methyl-4-bromoindodione, yield 67percent.

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Reference:
Patent; Tianjin University of Science and Technology; Yu Peng; Sun Hua; Han Kailin; Li Yashan; Peng Xiaolin; Teng Yuou; Zhang Yazhou; (26 pag.)CN104725372; (2017); B;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem