反应详情

温度

20 °C

To a solution of the title compound of step 2 (4.60 g, 15.93 mmol) in CH2Cl2 (200 mL) was added mCPBA (13.75 g, 79.68 mmol) slowly at 0° C. The mixture was stirred at 20° C. for 12 h and then sat. aq. Na2SO3 (200 mL) was added. EA extractive work up and silica gel chromatography gave the title compound (2.0 g, 39.1% yield) as a yellow solid. 1H NMR (CDCl3, 400 MHz) δ 8.18 (s, 1H), 7.31-7.27 (m, 1H), 7.10-7.01 (m, 2H), 3.36 (s, 3H). LCMS: 320.8 (M+1)+