Water → (3-Chloro-4-{[(2-chloro-5-{[(3-chlorophenyl)methyl]oxy}phenyl)carbonyl]amino}phenyl)acetic acid

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A solution of ethyl (3-chloro-4-{[(2-chloro-5-{[(3-chlorophenyl)methyl]oxy}phenyl)carbonyl]amino}phenyl)acetate (72 mg, 0.15 mmol) in acetic acid (3 ml) and 2M HCl (3 ml) was heated at 90° C. for 2 hours. On cooling water was added and the mixture filtered. The resulting solid was dried in vac oven, then triturated with ether to afford the title compound as an off-white solid (32 mg). MS (ES+) m/z 464 [M+H]+ (C24H2035Cl3NO4). 1H-NMR (400 MHz, d6-DMSO) δ 3.63 (2H, s), 5.20 (2H, s), 7.17 (1H, dd, J 8.8, J 2.8), 7.25-7.60 (10H, m), 10.18 (1H, s), 12.5 (1H, s).

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