反应详情

The product of Example 9B (160 mg, 0.5 mmol) was dissolved in MeCN (10 mL) and treated with HOAc (Sigma, 60 mg, 1 mmol) for 10 min. N-bromosuccinimide (Aldrich, 110 mg, 0.6 mmol) in MeCN (Aldrich, 5 mL) was slowly added over 5 min. The mixture was stirred for 1 hour at ambient temperature and concentrated under vacuum. The title compound was purified by chromatography (SiO2, CH2Cl2:MeOH:NH3.H2O, 90:10:1, Rf. 0.15) as a solid (70 mg, yield, 35%). 1H NMR (300 MHz, CD3OD) δ 1.55-1.62 (m, 1H), 1.70-1.96 (m, 2H), 2.05-2.20 (m, 1H), 2.29-2.43 (m, 1H), 2.74-3.13 (m, 5H), 3.42-3.66 (m, 1H, 5.24-5.46 (m, 1H), 7.27 (d, J=9.2 Hz, 1H), 7.38 (s, 1H), 7.53 (d, J=8.5 Hz, 1H), 7.82 (dd, J=8.5, 1.7 Hz, 1H), 8.05 (s, 1H), 8.11 (d, J=9.5 Hz, 1H) ppm. MS (DCI/NH3): 399 (M+H)+, 401 (M+H)+.

1. concentrationconcentrated under vacuum
2. customThe title compound was purified by chromatography (SiO2, CH2Cl2:MeOH:NH3.H2O, 90:10:1, Rf. 0.15) as a solid (70 mg, yield, 35%)