4-(Bromomethyl)benzoic acid → N-{1-[(Cyano-dimethyl-methyl)-carbamoyl]-3-methyl-butyl)-4-bromomethyl-benzamide

Participants

Reaction Steps

4-Bromomethylbenzoic acid (4.1 mmol), HOBt (4.1 mmol) and WSCD.HCI (4.1 mmol) are dissolved in dimethylformamide (7 ml) and stirred for 10 min. 2-Amino-4-methyl-pentanoic acid (cyano-dimethyl-methyl)-amide (4.1 mmol) is added in DMF (3 ml) and the reaction mixture is stirred at RT overnight. After evaporation of the solvent, the residue is extracted with ethyl acetate. The extract is washed with water, 10% citric acid, brine, sodium bicarbonate, brine and dried over magnesium sulfate and evaporated. The crude product is suspended in diethylether and the solid filtered of and dried (vacuum). A white powder with mp. 185-187° C., Rf=0.43 (n-hexane:ethyl acetate=1:1) is obtained.

Provenance & Evidence