3-Sulfamoylbenzoic acid → 3-(Hydroxymethyl)benzene-1-sulfonamide

Participants

Reaction Conditions

Reaction Steps

To a solution of 3-(aminosulfonyl)benzoic acid (Fluorochem) (150 mg, 0.746 mmol) in THF (1 mL) was added dropwise at 0° C. Borane-THF complex (3.73 mL, 3.73 mmol). The resulting solution was stirred 10 min at 0° C., and then at room temperature overnight. The reaction mixture was carefully quenched with 10 mL of water at 0° C. The reaction mixture was diluted with 30 mL of EtOAc and 20 ml of water. The aqueous layer was further extracted with 30 mL of EtOAc. The combined organic solutions were washed with brine (30 mL), dried over an hydrophobic frit and concentrated under reduced pressure. The residue was loaded in dichloromethane to a silica cartridge (20 g), and purified by chromatography on Flashmaster using a 0-100% ethyl acetate-dichloromethane over 40 min. The appropriate fractions were combined and evaporated in vacuo to give the title compound (86.4 mg, 62%) as a gum. LCMS (System A) RT=0.41 min, ES+ve m/z 188 (M+H)+.

Provenance & Evidence