N-Iodosuccinimide → Compound 3

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A solution of alcohol 103 (10.74 g, 50.9 mmol) in trifluoroacetic acid (TFA, 50 mL) was treated with N-iodosuccinimide (12.03 g, 53.45 mmol, 1.05 equiv) at 25° C. and stirred for 2 h. When TLC and HPLC/MS showed the reaction was complete, the reaction mixture was concentrated in vacuo. The residue was then treated with H2O (100 mL) and 20% EtOAc/hexane (100 mL) at 25° C., and the resulting mixture was stirred at 25° C. for 30 min before being cooled to 0-5° C. for 2 h. The white solids were collected by filtration, washed with H2O (2×25 mL) and 20% EtOAc/hexane (2×25 mL), and dried in vacuo to afford the desired (5R)-3-(3-fluoro-4-iodo-phenyl)-5-hydroxymethyl-oxazolidin-2-one 104 (15.1 g, 88% yield) as an off-white powder. This product was directly used in subsequent reactions without further purification. 1H NMR (300 MHz, DMSO-d6) δ 3.58 (dd, 1H, J=4.2, 12.6 Hz), 3.67 (dd, 1H, J=3.0, 12.6 Hz), 3.67 (dd, 1H, J=6.3, 9.0 Hz), 4.07 (t, 1H, J=9.0 Hz), 4.72 (m, 1H), 5.21 (br. s, 1H, OH), 7.22 (dd, 1H, J=2.4, 8.4 Hz), 7.58 (dd, 1H, J=2.4, 11.1 Hz), 7.81 (dd, 1H, J=7.8, 8.7 Hz). C10H9FINO3, LCMS (EI) m/e 338 (M++H).

Herkunft & Nachweise