Ammonium Chloride → 2-Amino-5-(benzyloxy)benzenesulfonamide

Participants

Reaction Steps

The product of Example 304C (3.85 g, 0.0125 mol) was treated with iron powder (4.3 g, 0.077 mol, 6.15 equivalent) and ammonium chloride (4.4 g, 0.082 mol) in methanol (100 mL) and water (50 mL), and stirred at reflux for 1 hour. The hot reaction mixture was filtered through fluted filter paper and washed with hot methanol. The filtrate was concentrated under reduced pressure to a white semi-solid that was partitioned between ethyl acetate and water. The organic layer was washed with brine, dried over anhydrous sodium sulfate, filtered and the solvent removed under reduced pressure to give the title compound as a off white solid (2.5 g). 1H NMR (300 MHz, DMSO-d6) δ ppm 4.98 (s, 2 H) 5.46 (s, 2 H) 6.76 (d, J=8.82 Hz, 1 H) 7.01 (dd, J=8.82, 2.94 Hz, 1 H) 7.21 (d, J=2.94 Hz, 1 H) 7.23 (s, 2 H) 7.37 (m, 5 H). ESI m/z (M+H)+279. ESI m/z (M−H)−277.

Provenance & Evidence