Hydrochloric Acid → 3,5-Dinitro-4-phenylbenzoic acid

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Reaction Steps

To a stirred suspension of methyl 3,5-dinitro-4-phenylbenzoate (145 g) in 2-methoxyethanol (1.5 l), 2 N sodium hydroxide (300 ml) is added dropwise during about 30 minutes. After additional stirring for about 15 minutes, the resulting solution is acidified by the dropwise addition of 4 N hydrochloric acid (250 ml), and the mixture is thereafter diluted with water (about 3 l). After cooling, the resulting precipitate is collected by filtration, washed with water and dried. After recrystallization from aqueous ethanol, 3,5-dinitro-4-phenylbenzoic acid is obtained with a melting point of 219°-221° C.

Provenance & Evidence