1-(3-amino-4-bromophenyl)ethanone

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: (Preparation of 2,4'-dibromo-3'-sulfamoylacetophenone: 5.35 g of 3'-amino-4'-bromoacetophenone, melting point: 113° C, were diazotized in 50 ml of semi-concentrated hydrochloric acid with 1.75 g of sodium nitrite at 0° - 5° C and then decomposed according to Meerwein with 62 ml of sulfur-dioxide-saturated glacial acetic acid solution and 2 g of copper-II-chloride-dihydrate. After the addition of 62 ml of water, the 4'-bromo-3'-chlorosulfonylacetophenone was obtained which melted at 107° C and could be introduced without further purification into about 50 ml of liquid ammonia. After evaporation of the ammonia and treatment with water, 4'-bromo-3'-sulfamoylacetophenone were obtained which melted at 161° C.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 5.35 g of 3'-amino-4'-bromoacetophenone, melting point: 113° C., were diazotized in 50 ml of semi-concentrated hydrochloric acid with 1.75 g of sodium nitrite at 0°-5° C. and then decomposed according to Meerwein with 62 ml of sulfur-dioxide-saturated glacial acetic acid solution and 2 g of copper-II-chloride-dihydrate. chloride-dihydrate. After the addition of 62 ml of water, the 4'-bromo-3'-chlorosulfonylacetophenone was obtained which melted at 107° C. and could be introduced without further purification into about 50 ml of liquid ammonia. After evaporation of the ammonia and treatment with water, 4'-bromo-3'-sulfamoylacetophenone were obtained which melted at 161° C.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: (Preparation of 2,4'-dibromo-3'-sulfamoylacetophenone: 5.35 g of 3'-amino-4'-bromoacetophenone, melting point: 113° C, were diazotized in 50 ml of semi-concentrated hydrochloric acid with 1.75 g of sodium nitrite at 0° - 5° C and then decomposed according to Meerwein with 62 ml of sulfur-dioxide-saturated glacial acetic acid solution and 2 g of copper-II-chloride-dihydrate. After the addition of 62 ml of water, the 4'-bromo-3'-chlorosulfonylacetophenone was obtained which melted at 107° C and could be introduced without further purification into about 50 ml of liquid ammonia. After evaporation of the ammonia and treatment with water, 4'-bromo-3'-sulfamoylacetophenone were obtained which melted at 161° C.