Lithium Hydroxide → 2-chloro-1-{[2-methyl-3-(trifluoromethyl)phenyl]methyl}-6-(4-morpholinyl)-1H-benzimidazole-4-carboxylic acid

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Reaction Steps

A mixture of methyl 2-chloro-1-{[2-methyl-3-(trifluoromethyl)phenyl]methyl}-6-(4-morpholinyl)-1H-benzimidazole-4-carboxylate, prepared as described in Example 66 (0.6 g, 1.282 mmol) in Tetrahydrofuran (THF) (10 mL) was added in 2 N lithium hydroxide (6.41 mL, 12.82 mmol). The reaction mixture was stirred at 50 C for 70 min. The reaction was cooled down. The organic solvent was removed in-vacuo. The aqueous mixture was acidified using 1 N HCl. The solid precipitated. Filtration and washing with water gave the product as white solid (0.55 g, 90%). 1H NMR (400 MHz, DMSO-d6) d ppm 2.54 (s, 3H) 3.05-3.16 (m, 4H) 3.67-3.78 (m, 4H) 5.63 (s, 2H) 6.43 (d, J=7.83 Hz, 1H) 7.28 (t, J=7.83 Hz, 1H) 7.36 (d, J=2.27 Hz, 1H) 7.49 (d, J=2.53 Hz, 1H) 7.63 (d, J=8.08 Hz, 1H) 12.90 (s, 1H). MS (ES+) m/e 453.9 [M+H]+.

Provenance & Evidence