1-Hydroxybenzotriazole → 3-amino-5-(4-fluorophenyl)-N-{2-[4-(1-pyrrolidin-1-ylethyl)phenyl]ethyl}thiophene-2-carboxamide

Participants

Reaction Steps

To a mixture of 3-amino-5-(4-fluorophenyl)thiophene-2-carboxylic acid (0.20 g), 2-[4-(1-pyrrolidin-1-ylethyl)phenyl]ethanamine dihydrochloride (0.22 g), 1-hydroxybenzotriazole (0.16 g), N,N-diisopropylethylamine (0.30 ml) and DMF (3.0 ml) was added 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (0.15 g), and the mixture was stirred overnight at room temperature. The reaction mixture was diluted with ethyl acetate, washed with water and saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was purified by column chromatography (hexane:ethyl acetate=9:1 (volume ratio)→1:2 (volume ratio)) using NH-silica gel to give 3-amino-5-(4-fluorophenyl)-N-{2-[4-(1-pyrrolidin-1-ylethyl)phenyl]ethyl}thiophene-2-carboxamide (0.15 g).

Provenance & Evidence