Hydrochloric Acid → 2-(3,4,5-Trimethoxyphenylethynyl)thiazole-4-carboxylic Acid

Participants

Reaction Steps

Ethyl 2-(3,4,5-trimethoxyphenylethynyl)thiazole-4-carboxylate (200 mg) was suspended in methanol (2 mL), to the suspension a 4 M solution (1 mL) of sodium hydroxide was added, and the mixture was stirred at room temperature for 4 hours. Concentrated hydrochloric acid was added dropwise to the reaction mixture at 0° C. to weakly acidify the reaction mixture. Crystals formed were collected by filtration, washed with water and dried to obtain the title compound.

Provenance & Evidence