反应详情

A solution of KOH (12.69 g, 85+%) in water (230 ml) was added to a suspension of Example 23 (114 g) in EtOH (345 ml). The resulting mixture was heated at reflux for 70 minutes, by which time the reaction had gone to completion. It was cooled and water (285 ml) added. The suspension was filtered and washed with water (200 ml). The product was dried under vacuum to give the title compound as a yellow solid (120 g). δH (CDCl3) 8.90 (1H, s), 7.55-7.65 (3H, m), 7.40 (2H, m), 7.20-7.30 (2H, m), 6.90 (3H, m), 6.35 (1H, d, J 9 Hz), 5.40 (2H, br s), 3.70 (2H, q, EtOH), 2.35 (3H, s), 1.25 (3H, t, EtOH). LCMS (ES+) RT 3.1 minutes, 376 (M+H)+.

1. temperatureThe resulting mixture was heated
2. temperatureat reflux for 70 minutes, by which time the reaction
3. temperatureIt was cooled
4. filtrationThe suspension was filtered
5. washwashed with water (200 ml)
6. customThe product was dried under vacuum