Hydrochloric Acid → HCID 86714429, compound

Participants

Reaction Steps

To 13.60 g of 1-Cyclohexylmethyl-2-thiophen-2-ylmethyl-1H-benzoimidazole-5-carboxylic acid methyl ester in 25 ml of methanol and 100 ml of THF were added 37 ml of 2 M aqueous sodium hydroxide solution. The reaction stirred at rt for 6 h. The reaction mixture was adjusted to pH 4 by the addition of 2M aqueous hydrochloric acid and was extracted with ethyl acetate three times. The combined organic phases were dried over sodium sulphate and concentrated in vacuo. The residue was purified by chromatography (silica, heptane/ethyl acetate) to yield 11.1 g (85%) of 1-Cyclohexylmethyl-2-thiophen-2-ylmethyl-1H-benzoimidazole-5-carboxylic acid.

Provenance & Evidence