反应详情

温度

0 °C

A solution of 737 mg (3.23 mmol) of 2-(4-amino-phenyl)-ethanesulfonic acid dimethylamide (as prepared in the previous step) in CH2Cl2 (20 mL) was cooled to 0° C. and treated with 574 mg (3.23 mmol) of NBS. The ice bath was removed and the mixture stirred at RT for 25 min. The mixture was diluted with CH2Cl2 (40 mL) and washed with saturated aqueous NaHCO3 (2×30 mL). The aqueous layer was extracted with CH2Cl2 (1×30 mL) the combined organic layers were dried (MgSO4) and concentrated in vacuo to afford 955 mg (96%) of the title compound as a white solid: 1H-NMR (CD3OD; 400 MHz): δ 7.35 (d, 1H, J=2.0 Hz), 7.04 (dd, 1H, J=8.0, 2.0 Hz), 4.44 (br s, 2H), 3.21-3.14 (m, 2H), 2.96-2.89 (m, 2H), 2.84 (s, 6H). Mass spectrum (ESI, m/z): Calcd. for C10H15N2OSBr, 307.0/309.0 (M+H). found 307.0/309.0.

1. customThe ice bath was removed
2. additionThe mixture was diluted with CH2Cl2 (40 mL)
3. washwashed with saturated aqueous NaHCO3 (2×30 mL)
4. extractionThe aqueous layer was extracted with CH2Cl2 (1×30 mL) the combined organic layers
5. dry with materialwere dried (MgSO4)
6. concentrationconcentrated in vacuo