Lithium hydroxide, monohydrate → 2-Methyl-6-{[2-(1-methyl-1H-imidazol-2-yl)thieno[3,2-b]pyridin-7-yl]oxy}benzo[b]thiophene-3-carboxylic acid

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Reaction Steps

This material was prepared by the reaction of methyl 2-methyl-6-{[2-(1-methyl-1H-imidazol-2-yl)thieno[3,2-b]pyridin-7-yl]oxy}benzo[b]thiophene-3-carboxylate 117a (200 mg, 0.46 mmole) with LiOH.H2O (192 mg, 4.6 mmole) in a manner as previously described for example 11c to give a yellow solid (165 mg, 85%). 1H NMR (DMSO-d6, 300 MHz): δ8.57 (1H, d, J=5.46 Hz), 8.45 (1H, d, J=8.85 Hz), 8.00 (2H, s), 7.53 (1H, s), 7.40 (1H, dd, J=2.35, 8.95 Hz), 7.22 (1H, s), 6.79 (1H, d, J=5.46 Hz), 4.00 (3H, s), 2.82 (3H, s).

Provenance & Evidence