Methanol → 1-((1R,2R)-2-Methyl-cyclohexyl)-2-thiazol-5-ylmethyl-1H-benzoimidazole-5-carboxylic acid

Participants

Reaction Steps

0.35 g 4-((1R,2R)-2-Methyl-cyclohexylamino)-3-(2-thiazol-5-yl-acetylamino)-benzoic acid methyl ester was dissolved in 6 ml of THF and 3 ml of methanol and 7 ml of 2 M aqueous sodium hydroxide solution were added at rt for 4 h. The reaction was concentrated and the pH was adjusted to 5 by addition of 2 M aqueous hydrochloric acid, and the mixture was extracted with ethyl acetate twice. The combined organic layers were dried over sodium sulphate and concentrated to afford 0.32 g (95%) of 1-((1R,2R)-2-Methyl-cyclohexyl)-2-thiazol-5-ylmethyl-1H-benzoimidazole-5-carboxylic acid.

Provenance & Evidence