Triethylamine → 4-[4-(2-Chloro-phenoxy)-butyrylamino]-thiophene-3-carboxylic acid methyl ester

참여 물질

반응 단계

To 4-amino-thiophene-3-carboxylic acid methyl ester hydrochloride (199 mg, 0.994 mmol) in dichloromethane (1.9 mL) and triethylamine (0.29 mL, 2.08 mmol), was slowly added a crude solution of 4-(2-chloro-phenoxy)-butyryl chloride (271 mg, approximately 1.16 mmol) in dichloromethane (1.9 mL). The reaction mixture was stirred for 3 hours at room temperature. The reaction mixture was then further diluted with dichloromethane (50 mL) and washed with water. The aqueous phase was then extracted with dichloromethane and the combined organic phases were dried with sodium sulfate, and concentrated in vacuo. The residue was then purified by column chromatography (SiO2, Heptane/EtOAc: 0-80%) to yield the title compound as a white solid (281 mg, 80%).

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