4-Chlorophenyl Isocyanate → methyl 2-(N'-(4-chlorophenyl)ureido)-3-phenylpropanoate

Participants

Reaction Steps

To a solution of phenylalanine methyl ester hydrochloride (2.0 g) and DBU (1.4 ml) in acetonitrile (40 ml) was added 4-chlorophenyl isocyanate (1.4 g). The reaction mixture was mixed at room temperature for 1 hour, and then the reaction solution was concentrated under reduced pressure. The residue was dissolved in ethyl acetate, washed with water and saturated brine and dried over anhydrous sodium sulfate. The solvent was distilled off under reduced pressure to obtain the title compound as colorless powder (3.0 g, 97%).

Provenance & Evidence