Ammonia → 7-Fluoro-1,3-benzothiazol-2-amine

Participants

Reaction Conditions

Reaction Steps

A mixture of 7-fluoro-2-methylsulfonyl-1,3-benzothiazole (500 mg, 2.16 mmol) in 10 mL ethanol and 20% ethanolic ammonia (20 mL) was heated at 160° C. in a sealed tube for 12 h. It was cooled to RT, ethanol was removed under reduced pressure, and the brownish residue was purified by column chromatography (5% to 10% methanol in methylene chloride) to afford the title compound. 1H-NMR (CDCl3, 300 MHz): δ=7.35 (d, J=7.5 Hz, 1H), 7.33-7.37 (m, 1H), 6.93-6.84 (m, 1H), 5.30 (brs, 2H).

Provenance & Evidence