Hydrochloric Acid → HCID 86714424, compound

Participants

Reaction Conditions

Reaction Steps

To 2.28 g 4-(1-Ethyl-propylamino)-3-(2-pyrazol-1-yl-acetylamino)-benzoic acid methyl ester were added 50 ml of 4M hydrochloric acid in dioxane. Divided into five portions the reaction mixture was heated to 110° C. for 15 min in a microwave reactor. After cooling to the reaction mixture 6 ml of 10 M aqueous sodium hydroxide solution were added slowly. After 30 min at rt the reaction mixture was concentrated to a third of its volume and adjusted to pH 4 by the addition of 2M aqueous hydrochloric acid. It was extracted with ethyl acetate three times. The combined organic phases were dried over sodium sulphate and concentrated in vacuo. 1.86 g (90%) of 1-(1-Ethyl-propyl)-2-pyrazol-1-ylmethyl-1H-benzoimidazole-5-carboxylic acid were obtained.

Provenance & Evidence