Allyl bromide → HCID 87203470, compound

Participants

Reaction Steps

A solution of N-(2-{[1-dimethylamino-meth-(E)-ylidene]-sulfamoyl}-3-hydroxy-phenyl)-2,2-dimethyl-propionamide (600 mg, 1.84 mmol) in DMF (4 ml) is treated at 70° C. with allyl bromide (217 μl, 2.57 mmol) and K2CO3 (380 mg) for 45 min with stirring. After evaporation of the solvent, the residue is partitioned between water and EtOAc. The organic layer is dried (Na2SO4) and evaporated yielding N-(3-allyloxy-2-{[1-dimethylamino-meth-(E)-ylidene]-sulfamoyl}-phenyl)-2,2-dimethyl-propionamide. A solution of N-(3-allyloxy-2-{[1-dimethylamino-meth-(E)-ylidene]-sulfamoyl}-phenyl)-2,2-dimethyl-propionamide (387 mg, 1.05 mmol) in ethanol (12 ml) and 12 drops of conc HCl (aprox. 0.2 ml) is refluxed for 36 h. After evaporation of the solvent, the residue is partitioned between ammonia (pH 10 to 11) and EtOAc. The organic layer is dried (Na2SO4) and evaporated. Chromatography (silica gel, EtOAc/hexanes=2:1) afforded N-(3-allyloxy-2-sulfamoyl-phenyl)-2,2-dimethyl-propionamide containing some N-(3-allyloxy-2-sulfamoyl-phenyl)-2,2-dimethyl-propionamide. Treatment of this material with ethanol (20 ml) and conc. HCl (2 ml) for 30 h at reflux temperature and workup as above gives N-(3-allyloxy-2-sulfamoyl-phenyl)-2,2-dimethyl-propionamide.

Provenance & Evidence