Synthesis of 5-Bromovanillin , Room Temperature Bromination

Combine 30.4 g of vanillin, 150 mL of glacial acetic acid and 35.2 g (11.4 mL) of bromine. Stir for 1h, pour the mixture into 200 mL of water ice mixture, filter, wash the precipitate with water 3 times. Dry the 5-bromovanillin and recrystallize in hot ethanol.

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Filtering and washing the precipitate

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