Water → 2,4-Dibromo-6-(difluoromethanesulfonyl)aniline

Participants

Reaction Conditions

Reaction Steps

A solution of 2-amino-3,5-dibromobenzenesulfinic acid (7.98 g; 0.025 mol) in a mixture of isopropyl alcohol (100 ml) and sodium hydroxide (8.0 g of 50% aqueous) and water (2 ml) is warmed to 40° C. Chlorodifluoromethane is added slowly through a gas inlet tube over a period of 3 hours. The reaction mixture exotherms to 55° C. The reaction mixture is poured into water (500 ml) and the solution is extracted with methylene chloride (2×100 ml). The combined extracts are washed with saturated NaHCO3 (100 ml), saturated NaCl (100 ml), then dried over MgSO4. The solvent is evaporated under vacuum yield 0.9 g of the title product, m.p. 84°-88° C.

Provenance & Evidence