反应详情

To 5.30 g of 1-(1-Ethyl-propyl)-2-furan-2-ylmethyl-1H-benzoimidazole-5-carboxylic acid methyl ester 12 ml of methanol and 22 ml THF 22 ml of 1 M aqueous sodium hydroxide solution were added and the reaction was stirred for 16 h. The reaction mixture was adjusted to pH 5 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. 4.83 g (85%) of 1-(1-Ethyl-propyl)-2-furan-2-ylmethyl-1H-benzoimidazole-5-carboxylic acid were obtained.

1. extractionwas extracted with ethyl acetate three times
2. dry with materialThe combined organic phases were dried over sodium sulphate
3. concentrationconcentrated in vacuo