反应详情

To a solution of 4.48 g of 2-furylacetic acid in 30 ml of dry DMF 1.00 g of HOBT, 3.97 g of EDC and 1.8 ml of DIPEA were added at 0° C. After 30 min 3.50 g of 3-amino-4-(1-ethyl-propylamino)-benzoic acid methyl ester and 1.8 ml of DIPEA were added and the reaction was stirred at it for 16 h. The reaction was then poured into water and extracted with ethyl acetate three times. The combined organic phases were washed with saturated aqueous sodium carbonate solution and saturated aqueous ammonium chloride solution, dried over magnesium sulphate and concentrated to obtain 4.44 g (87%) of 4-(1-Ethyl-propylamino)-3-(2-furan-2-yl-acetylamino)-benzoic acid methyl ester.

1. extractionextracted with ethyl acetate three times
2. washThe combined organic phases were washed with saturated aqueous sodium carbonate solution and saturated aqueous ammonium chloride solution
3. dry with materialdried over magnesium sulphate
4. concentrationconcentrated