反应详情

A mixture of Example 182C (2.481 g, 12.97 mmol) and nitromethane (13.99 mL, 259 mmol) was heated with an oil bath at 120° C. for 48 hours. The nitromethane was evaporated and the crude mixture was purified by silica gel chromatography (Analogix IntelliFlash™280, SF25-80) eluting with 15-30% ethyl acetate/hexanes to obtain the title compound. 1H NMR (500 MHz, DMSO-d6) δ ppm 11.15 (s, 1H), 7.34-7.25 (m, 3H), 7.25-7.15 (m, 1H), 6.87 (s, 1H), 2.77-2.64 (m, 2H), 2.22 (m, 2H), 2.14 (m, 2H); MS (ESI+) m/z 205.3 (M+H)+.

1. customThe nitromethane was evaporated
2. customthe crude mixture was purified by silica gel chromatography (Analogix IntelliFlash™280, SF25-80)
3. washeluting with 15-30% ethyl acetate/hexanes