反应详情

温度

5 °C

A stirred mixture of 2,3-dichloroanisole (89 g., 0.50 mole) and 6-bromohexanoylchloride (120 g., 0.59 mole) in methylene chloride (500 ml.) is cooled to 5°C. and treated with aluminum chloride (74 g., 0.56 mole) in portions during a one-half hour period. The reaction mixture is kept at 25°C. for 18 hours then poured into ice water (1 l.) containing hydrochloric acid (100 ml.) the organic phase is separated, washed with water, 2% sodium hydroxide and dilute hydrochloric acid. The methylene chloride is evaporated at reduced pressure. The crude product is dissolved in ether (200 ml.), dried over magnesium sulfate, filtered and treated with hexane (600 ml.) affording 2,3-dichloro-4-(6-bromohexanoyl)anisole which melts at 52°-53°C.

1. customis separated
2. washwashed with water, 2% sodium hydroxide and dilute hydrochloric acid
3. customThe methylene chloride is evaporated at reduced pressure
4. dissolutionThe crude product is dissolved in ether (200 ml.)
5. dry with materialdried over magnesium sulfate
6. filtrationfiltered
7. additiontreated with hexane (600 ml.)