Ammonium Hydroxide → 5-Chlorothiophene-2-Sulfonamide

Participants

Reaction Conditions

Reaction Steps

3 g (1 mol equiv.) 5-Chloro-thiophene-2-sulfonyl chloride was dissolved in 30 mL acetonitrile and cooled to 0° C. Dropwise, 6.5 mL (3 mol equiv.) ammoniumhydroxide was added and the reaction mixture was stirred at room temperature for 10 min. Volatiles were removed under reduced pressure, and the solid residue was washed with water and dried in vacuo to afford 2.49 g (91%) 5-chloro-thiophene-2-sulfonic acid amide. 1H NMR (400 MHz, DMSO-d6) δ 7.21 (d, J=4.0 Hz, 1H), 7.43 (d, J=4.0 Hz, 1H), 7.79 (br.s., 2H).

Provenance & Evidence