Stannous chloride dihydrate → 2-(2-Amino-4-chlorophenylsulfanyl)-benzoic acid methyl ester

Participants

Reaction Conditions

Reaction Steps

To a mixture of 2-(4-chloro-2-nitro-phenylsulfanyl)-benzoic acid methyl ester (189JO09) (232 mg, 0.72 mmol) in EtOH (5 mL) was added SnCl2.2H2O (812 mg, 3.6 mmol) and the resulting mixture was stirred at 80° C. for 2 h and then concentrated. The residue was treated with ice, and then Na2CO3 was added until a pH of 10 was reached. EtOAc was added and the slurry was filtered through celite. The EtOAc-phase was washed with water and brine, dried (Na2SO4) and concentrated to give 149 mg (70%) of the title compound (189JO11). 1H NMR (CDCl3) δ 8.02 (dd, 1 H, J=1.6, 7.8 Hz), 7.39 (d, 1 H, J=8:2 Hz), 7.29 (m, 1 H), 7.15 (dt, 1 H, J=1.2, 7.8 Hz), 6.87 (d, 1 H, J=2.2 Hz), 6.80 (dd, 1 H, J=2.2, 8.2 Hz), 6.76 (dd, 1 H, J=1.2, 8.0 Hz), 3.96 (s, 3 H).

Provenance & Evidence