Triethylamine → 4-[(2-Sulfamoyl-5-thienyl)sulfonyl]phenyl 1-acetylpiperidine-4-carboxylate

Participants

Reaction Steps

A solution of 5-[(4-hydroxyphenyl)sulfonyl]thiophene-2-sulfonamide (3.19 g; 0.01 mole) in acetone (60 ml) at -15° was treated with triethylamine (1.11 g; 0.011 mole). Then 1-acetylpiperidine-4-carbonyl chloride hydrochloride (2.41 g; 0.011 mole) was added, portionwise, during 15 minutes at -15°. The cooling bath was removed and stirring was continued. After 20 hours at room temperature, the reaction mixture was treated with triethylamine (1.11 g; 0.011 mole). Then after stirring one hour longer, the reaction mixture was treated with 1-acetylpiperidine-4-carbonyl chloride hydrochloride (2.41 g; 0.011 mole) and triethylamine (2.22 g; 0.022 mole) and stirred at room temperature.

Provenance & Evidence