Methyl 2-(4-(4-(3-(2-chlorophenyl)ureido)phenyl)thiazole-2-carboxamido)-3-methylbutanoate → 2-(4-(4-(3-(2-Chlorophenyl)ureido)phenyl)thiazole-2-carboxamido)-3-methylbutanoic acid

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Reaction Steps

To methyl 2-(4-(4-(3-(2-chlorophenyl)ureido)phenyl)thiazole-2-carboxamido)-3-methylbutanoate (Example 23, 120 mg) in THF (2 ml), 1N lithium hydroxide monohydrate (1.2 ml) was added and reaction mixture was stirred for 16 hours at RT. Organic solvent was concentrated and added water, dilute HCl was added under stirring to pH acidic. The reaction mixture was filtered, and the residue was washed by water, and dried. The residue was dissolved in acetone, pet ether was added, solid was filtered and dried obtain title compound as solid. Yield: 70 mg (60%). 1H NMR (DMSO-d6, 300 MHz): δ 12.98 (bs, 1H), 9.59 (s, 1H), 8.48 (d, 1H), 8.35 (s, 1H), 8.30 (s, 1H), 8.17 (d, 1H), 8.03 (d, 2H), 7.58 (d, 2H), 7.46 (d, 1H), 7.30 (t, 1H), 7.02 (t, 1H), 4.33 (s, 1H), 2.26 (s, 1H), 0.98 (d, 6H).

Provenance & Evidence