反应详情

Potassium carbonate (72.4 g, 524 mmol) was added to a mixture of 1-(5-chloro-2-hydroxy-3-iodo-4-methylphenyl)ethanone (81.3 g, 262 mmol) and methyl iodide (19.6 mL, 314 mmol) in N,N-dimethylformamide (250 mL). The mixture was stirred at room temperature for 4 hours. Water (500 mL) was added and stirred for 15 minutes. The dark solids were filtered and dried in vacuo to give 42.3 g of the desired product. The filtrate was extracted with EtOAc (4×). The combined filtrates were washed with water (2×) and brine, dried (MgSO4), filtered and concentrated. The solids were dried in vacuo to give an additional 37.2 g of the desired product. The product was used without further purification, LCMS calculated for C10H11ClIO2 (M+H)+: m/z=324.9; Found: 325.0. 1H NMR (300 MHz, CDCl3): δ 7.62 (s, 1H), 3.78 (s, 3H), 2.65 (s, 3H), 2.62 (s, 3H) ppm.

1. stirringstirred for 15 minutes
2. filtrationThe dark solids were filtered
3. customdried in vacuo