反应详情

The product of Example 147 (0.0085 g, 0.019 mmol) was reacted with tert-butyl nitrite (5 □L, 0.037 mmol) in DMF (0.3 mL) at 60° C. for 1 hour. The reaction was cooled, and the crude mixture was purified by column chromatography with silica gel eluting with hexane and ethyl acetate (1:1) to give the title compound as a yellow solid (0.0045 g, 54%). MS (ESI) m/z 437 (M−H)−; 1H NMR (300 MHz, DMSO-d6) δ 5.53 (s, 2 H), 7.25 (m, 1 H), 7.31 (m, 4 H), 7.43 (m, 2 H), 7.66 (m, 1 H), 7.80 (d, J=8.46 Hz, 1 H), 9.48 (s, 1 H), 14.56 (br s, 1 H).

1. temperatureThe reaction was cooled
2. customthe crude mixture was purified by column chromatography with silica gel eluting with hexane and ethyl acetate (1:1)