Ammonium Hydroxide → HCID 14254936, compound

Participants

Reaction Steps

Six grams of crude 3-(2-methoxyethyl)thiophene-2-sulfonyl chloride was dissolved in 25 mL of acetone and added dropwise with stirring at ambient temperature to 25 mL of concentrated aqueous ammonium hydroxide. The reaction mixture was allowed to stand overnight and the acetone removed by evaporation. The aqueous residue was extracted with three 100 mL portions of methylene chloride which were combined, dried over magnesium sulfate, filtered and evaporated to yield a residue which was a mixture of an oil and a solid. The sulfonamide was isolated by passing the residue through a 30 cm high by 80mm diameter column of silica gel using 1:1 ethyl acetate mixed hexanes solvent system and taking 100 mL fractions. The desired product came off in fractions 4 to 12. After evaporation of the solvent 1.84 grams was obtained, m.p. 64°-73° C. Analysis by mass spectroscopy showed a molecular weight of 221 AMU in agreement for the desired sulfonamide.

Provenance & Evidence