Triethylamine → 5-[1-(3-Hydroxy-phenyl)-ethyl-carbamoyl]-3-methyl-thiophene-2-carboxylic acid methyl ester

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Reaction Steps

To a solution of 3-methyl-thiophene-2,5-dicarboxylic acid 2-methyl ester (0.1 g, 0.5 mmol) and 3-(1-amino-ethyl)-phenol (82 mg, 0.6 mmol) in DMF (4 ml) was added at rt triethylamine (0.1 ml, 0.75 mmol), HOBT (81 mg, 0.6 mmol) and HBTU (228 mg, 0.6 mmol). The mixture was stirred at rt for 30 min, then quenched with 1NHCl and extracted with EtOAc. The layers were separated. The organic layer was washed with brine, then dried over Na2SO4 and concentrated under reduced pressure. The residue was purified by flash chromatography with 30-70% EtOAc in hexane to afford the desired product (121 mg, 75% yield).

Provenance & Evidence