反应详情

To a round bottom flask was added 4-bromophenol (1.7 g, 9.8 mmol, 1.0 eq.), acetamide 21 (2.79 g, 10.3 mmol, 1.05 eq.), potassium iodide (1.7 g, 10.3 mmol, 1.05 eq.), potassium carbonate (2.7 g, 19.6 mmol, 2.0 eq.), and acetonitrile (35.0 mL). The reaction mixture was then reluxed with vigorous stirring for 2 h. The hot reaction was then filtered to remove the insoluble potassium carbonate. The filtrate was concentrated to give 3.8 g of crude bromo-phenoxy-acetamide 22 as a light brown solid. The solid was then triturated with 10 mL of cold acetonitrile, filtered, and rinsed with 5 mL of cold acetonitrile to give pure bromo-phenoxy-acetamide 22 (1.85 g, 45% yield). Note: there was still an abundant amount of crude product in the mother liquor. LC/MSD (HP Series 1100 MSD) MS (ES+) m/z 409.9 (M+H)+1 1H-NMR, Varian 400 MHz (DMSO-d6) δ 8.20 (d, 1H), 7.90 (dd, 1H), 7.68 (d, 1H), 7.48 (d, 2H), 6.99 (d, 2H), 4.75 (s, 2H) ppm.

1. customThe hot reaction
2. filtrationwas then filtered
3. customto remove the insoluble potassium carbonate
4. concentrationThe filtrate was concentrated