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6 g of <strong>[23351-91-9]5-bromoisophthalic acid</strong> (0.024 mol) was added to 80 mL of ethanol.Slowly add 6 mL of concentrated sulfuric acid with stirring.It was refluxed at 90 C for 24 hours, cooled to room temperature and spun dry.The resulting solid was dissolved in ethyl acetate and then aqueous sodium hydrogen carbonate (5%)Wash to neutral, dry anhydrous sodium sulfate, filter, spin dry,A white solid was obtained.
With copper(l) iodide; potassium carbonate; In N,N-dimethyl-formamide; at 90℃; for 24h;Inert atmosphere; Darkness;
The specific preparation method includes the following steps:Add 3.6g of dihydrophenazine and 6g of anhydrous K2CO3 powder into a 200mL two-neck bottle, 10g bromotriphenylboron, 0.2g CuI, then add 50mL anhydrous DMF, blow nitrogen for 30 minutes, reflux for 24 hours at 90C in the dark, and cool the device to room temperature. Add a lot of water, and then suction filter the solid out,After drying, the product was recrystallized with 1,4-dioxane to obtain the product, and then sublimated to obtain a white solid, with a yield of 40%.
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