反応 #1834
ord-6c59e00fa9b34294a8339d168dc3dcaa
反応方程式
反応条件
後処理
- 1その他A 500 mL 3-neck round bottom flask equipped with a magnetic stirrer
- 2温度to cool for one hour
- 3workup.ADDITIONwas added
- 4温度the resulting mixture heated at 90° C. for 1.5 hours
- 5濃縮The reaction mixture was concentrated under vacuum at 50° C.
- 6その他to give a brown solid that
- 7ろ過filtered
- 8その他The solids were triturated with 200 mL of methanol
- 9ろ過filtered
- 10洗浄washed with additional methanol
- 11その他air dried
- 12その他After drying in a dessicator under high vacuum
実験手順
A 500 mL 3-neck round bottom flask equipped with a magnetic stirrer, dropping funnel, thermometer and nitrogen bubbler was charged with 10.7 g (108 mmol) of sodium methoxide and 75 mL of absolute ethanol. A solution of 24.9 g (183 mmol) of 2-hydroxy-5-methylbenzaldehyde in 75 mL of dry dimethylformamide was added dropwise over 15 minutes. The mixture was stirred for 20 minutes then treated dropwise over 20 minutes with a solution of 34.8 g (177 mmol) of α-bromo-o-tolunitrile in 75 mL of dry dimethylformamide. The mixture was heated at 75° C. for 30 minutes, then allowed to cool for one hour. A suspension of 10.7 g (188 mmol) of sodium methoxide in 20 mL of dry dimethylformamide was added and the resulting mixture heated at 90° C. for 1.5 hours. The reaction mixture was concentrated under vacuum at 50° C. to give a brown solid that was slurried in 100-200 mL of cold water and filtered. The solids were triturated with 200 mL of methanol, filtered, washed with additional methanol, then air dried. After drying in a dessicator under high vacuum, 26.1 g (112 mmol, 63%) of the product was isolated as a beige solid. 1H NMR (200 MHz,CDCl3): 2.45 (s,3H), 7.17 (d,8 Hz,1H), 7.4 (m,3H), 7.6-7.8 (m,3H), 8.10 (d,8 Hz,1H).