反应详情

温度

50 °C

N-Iodo succinimide (110 g, 0.486 mol) and potassium fluoride (3.2 g, 0.053 mol) are added to a stirred solution of 7-Chloro-2-(trimethylsilyl)furo[3,2-b]pyridine (11 g, 0.0486 mol) in dry acetonitrile (65 ml) at RT. The reaction mixture is heated at 50° C. for 2 h under nitrogen, cooled to RT and evaporate under reduced pressure. The residue is dissolved in ethyl acetate (500 ml), washed with saturated sodium thiosulfate (100 ml×2), water (100 ml×2) and saturated brine (100 ml), dried over sodium sulphate and concentrated under reduced pressure to afford the title compound (10.5 g, 77.3%) as an off white solid. TLC: hexane/ethyl acetate: (8/2): Rf=0.60; LCMS (method D): 3.49 min (purity 97.7%), M+H+ 279.8; 1H NMR (DMSO-d6, 400 MHz) δ [ppm] 8.41-8.405 (1H, d, J=5.3 Hz), 7.545 (1H, s), 7.448-7.435 (1H, d, J=5.2 Hz).

1. temperaturecooled to RT
2. customevaporate under reduced pressure
3. dissolutionThe residue is dissolved in ethyl acetate (500 ml)
4. washwashed with saturated sodium thiosulfate (100 ml×2), water (100 ml×2) and saturated brine (100 ml)
5. dry with materialdried over sodium sulphate
6. concentrationconcentrated under reduced pressure