反应详情

A solution of the product of Example 9B (28.4 mg, 0.151 mmol), and the product of Example 9E (53.3 mg, 0.151 mmol) in acetic acid (1 mL) was stirred in an oil bath preheated to 130° C. for 20 minutes. The mixture was then cooled to room temperature, the acetic acid removed under vacuum, and the resultant residue triturated with methanol to provide the title compound as a tan solid (26.5 mg, 35%). 1H NMR (300 MHz, DMSO-d6) δ ppm: 9.92 (s, 1 H), 9.63 (s, 1 H), 8.70 (d, J=8.09 Hz, 1 H), 8.55 (s, 1 H), 7.52 (d, J=8.46 Hz, 1 H), 7.38 (d, J=8.82 Hz, 2 H), 7.27 (s, 1 H), 7.06-7.18 (m, 3 H), 6.94 (d, J=8.46 Hz, 3 H), 6.61-6.72 (m, 2 H), 5.02 (s, 2 H), 3.75 (s, 3 H), 2.66 (s, 3 H); MS (ESI+) m/z 497.2 (M+H)+, (ESI−) m/z 495.3 (M−H)−.

1. customthe acetic acid removed under vacuum
2. customthe resultant residue triturated with methanol