反应详情

温度

25 °C

To a solution of N—[(S)-2-(5-bromo-2-fluoro-phenyl)-2-hydroxy-propyl]-2-nitro-benzenesulfonamide (20.8 g, 48 mmol) in CH2Cl2 (400 ml) was added PPh3 (19.2 g, 72.4 mmol) at 0-5° C. and diethyl azodicarboxylate (11.6 ml, 72.4 mmol). The reaction mixture was stirred for 24 h at 25° C. and concentrated. The title compound was obtained after chromatographic purification over silica gel (hexane-EtOAc 20:1 to 2:1) as yellow crystals: TLC (toluene-EtOAc 3:1): Rf=0.69; HPLC RtH5=1.308 min; 1H NMR (360 MHz, CDCl3): δ 8.31 (m, 1H), 7.28 (m, 3H), 7.60 (dd, 1H), 7.42 (m, 1H), 6.91 (dd, 1H), 3.24 (s, 1H), 2.81 (s, 1H), 2.06 (s, 3H).

1. concentrationconcentrated