Methanol → (S)-Methyl 2-amino-2-(4-fluorophenyl)acetate

関与物質

反応手順

Thionyl chloride (0.475 mL, 6.50 mmol) was added dropwise to a solution of (S)-4-fluorophenylglycine (commercially available from Sigma-Aldrich, Milwaukee, Wis.)(1.00 g, 5.91 mmol) in MeOH (25.0 mL), and the mixture was stirred at reflux for 2 hours. The reaction mixture was then concentrated to afford a brown oil. The residue was dissolved in EtOAc, and the solution was partitioned between EtOAc and saturated aqueous NaHCO3 solution. The aqueous phase was separated and extracted with EtOAc. The combined organic phases were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated to afford (S)-methyl 2-amino-2-(4-fluorophenyl)acetate (1.1 g, 6.0 mmol, 100% yield) as a brown oil. 1H NMR (400 MHz, DMSO-d6) δ ppm 2.28 (br. s., 2H), 3.59 (s, 3H), 4.55 (s, 1H), 7.05-7.23 (m, 2H), 7.31-7.53 (m, 2H). m/z (ESI) 184 (M+H)+.

情報源と証拠