Hydrochloric Acid → 2-(3-Methylphenyl)-5-methyl-1,3-thiazole-4-carboxylic acid

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Reaction Steps

0.2 g of methyl 2-(3-methylphenyl)-5-methyl-1,3-thiazole-4-carboxylate was dissolved in 10 ml methanol, 1 ml of 5N sodium hydroxide was added, and the mixture was heated under reflux for 1 hour. The reaction solution was ice-cooled and neutralized with 2N hydrochloric acid, followed by extracting with ethyl acetate. The organic layer was washed with brine, dried over anhydrous magnesium sulfate and evaporated, to give 0.2 g of 2-(3-methylphenyl)-5-methyl-1,3-thiazole-4-carboxylic acid.

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