反应详情

温度

-40 °C

A solution of 91.2 ml (0.23 mol) of 2.5M n-butyllithium solution was added dropwise at -40° C. to a solution of 50.0 g (0.19 mol) of 4-bromophenol benzyl ether in 250 ml of tetrahydrofuran. The mixture was subsequently stirred for a short time at -40° C., then cooled to -78° C., and 34 g (0.27 mol) of methyl trifluoroacetate were added dropwise. The mixture was allowed to come to room temperature and then stirred at 0° C. for 3 hours. For working up, 120 ml of dilute hydrochloric acid were added dropwise, the mixture was diluted with toluene, and the organic phase was separated off, washed with water, dried and concentrated. A brown solid was obtained which was recrystallized from petroleum ether/ethyl acetate 10:1.

1. temperaturecooled to -78° C.
2. customto come to room temperature
3. stirringstirred at 0° C. for 3 hours
4. customthe organic phase was separated off
5. washwashed with water
6. customdried
7. concentrationconcentrated
8. customA brown solid was obtained which
9. customwas recrystallized from petroleum ether/ethyl acetate 10:1