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齐倩倩

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[交流] 3-溴噻吩怎么硝化

各位高手请给下建议，3-溴噻吩怎么用冰醋酸和酸酐硝化，谢谢！

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1楼 2011-11-14 11:25:49

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goodspeed8917

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齐倩倩(金币+5):谢谢参与
jiangchunyong(金币+1): 谢谢 2011-11-14 13:09:27
齐倩倩(金币+5): 2011-11-14 19:03:51

7.4 ml of fuming nitric acid was slowly added to 92.1 ml of acetic acid under ice-cooling, followed by stirring for 10 minutes, and a solution of 52.1 ml of acetic anhydride containing 25 g of 3-bromothiophene was slowly added in such
a manner that the bulk temperature did not exceed 10.deg. C., followed by stirring at 10 .deg. C. for 2 hours. Ice was added to the reaction solution, and the resulting crystals were collected by filtration, and washed with water and diethyl ether/n-hexane=1/5 successively, to give 17.4 g of the title compound.
1H-NMR(400 MHz, CDCl3) d; 7.49(d,J=6,1H), 7.11(d,J=6,1H)