N,N-Dimethylaniline → (5S)-5-(Aminomethyl)-3-[4-(2-oxo-1-pyrrolidinyl)phenyl]-1,3-oxazolidin-2-one

関与物質

反応条件

反応手順

At −20° C., benzyl chloroformate (4.27 g, 25.03 mmol) is slowly added dropwise to 1-(4-aminophenyl)pyrrolidin-2-one (4 g, 22.7 mmol) and N,N-dimethylaniline (3.6 ml, 28.4 mmol) in tetrahydrofuran (107 ml). The reaction mixture is stirred at −20° C. for 30 min and then warmed to room temperature. After addition of ethyl acetate (0.5 l), the organic phase is washed with saturated NaCl solution (0.5 l). The combined organic phase are dried (magnesium sulfate), filtered and concentrated under reduced pressure. The residue is titrated with diethyl ether and filtered off with suction. Yield: 5.2 g, 74% of theory, light-beige crystals, melting point: 174° C.

情報源と証拠