1-(4-chlorophenyl)sulfonyl-3-propylurea

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

Procedure: n-Propylamine (5.9 g., 0.1 mole.) and propylene carbonate (10.2 g., 0.1 mole.) were mixed and heated at 60° over night. To the resulting hydroxypropyl-n-propylcarbomate were added p-chlorobenzene sulfonamide (10.67 g., as sodium salt) and DMF (200 ml.) and the mixture was heated at 120° for 4 hours. After evaporation of the solvent the residue was taken up in water (200 ml.) and the solution adjusted to pH 8 by the addition of acetic acid. Unreacted p-chlorobenzene sulfonamide (2 g.) separated out and was collected. Further adjustment to pH 5 precipitated 1-(4-chloro-benzenesulfonyl)-3-n-propyl-urea (2 g.) whose infrared spectrum was identical with that of an authentic sample. heated at 60° over night the mixture was heated at 120° for 4 hours After evaporation of the solvent the residue the solution adjusted to pH 8 by the addition of acetic acid Unreacted p-chlorobenzene sulfonamide (2 g.) separated out was collected Further adjustment to pH 5 precipitated 1-(4-chloro-benzenesulfonyl)-3-n-propyl-urea (2 g.) whose

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

Procedure: n-Propylamine (5.9 g., 0.1 mole.) and propylene carbonate (10.2 g., 0.1 mole.) were mixed and heated at 60° over night. To the resulting hydroxypropyl-n-propylcarbomate were added p-chlorobenzene sulfonamide (10.67 g., as sodium salt) and DMF (200 ml.) and the mixture was heated at 120° for 4 hours. After evaporation of the solvent the residue was taken up in water (200 ml.) and the solution adjusted to pH 8 by the addition of acetic acid. Unreacted p-chlorobenzene sulfonamide (2 g.) separated out and was collected. Further adjustment to pH 5 precipitated 1-(4-chloro-benzenesulfonyl)-3-n-propyl-urea (2 g.) whose infrared spectrum was identical with that of an authentic sample. heated at 60° over night the mixture was heated at 120° for 4 hours After evaporation of the solvent the residue the solution adjusted to pH 8 by the addition of acetic acid Unreacted p-chlorobenzene sulfonamide (2 g.) separated out was collected Further adjustment to pH 5 precipitated 1-(4-chloro-benzenesulfonyl)-3-n-propyl-urea (2 g.) whose