反应详情

温度

0 °C

4-Methylanisole (12.2 g., 0.1 mole) in 300 ml. of methylene chloride was cooled to 0° C. Titanium tetrachloride (3.8 g., 0.2 mole) was added followed by the dropwise addition of 1,1-dichloromethyl methyl ether (13.8 g., 0.12 mole) over 3 minutes. After stirring for 30 minutes at 0° C., the reaction mixture was poured into 600 ml. of water. The aqueous phase was extracted with two further portions of methylene chloride. The combined organic phase/extracts was washed with brine, dried over anhydrous magnesium sulfate and evaporated to yield 2-methoxy-5-methylbenzaldehyde as an oil [15 g., 100%; ir (CH2Cl2) 1678, 1608, 1488 cm-1 ].

1. additionthe reaction mixture was poured into 600 ml
2. extractionThe aqueous phase was extracted with two further portions of methylene chloride
3. washThe combined organic phase/extracts was washed with brine
4. dry with materialdried over anhydrous magnesium sulfate
5. customevaporated