反应详情

温度

45 °C

A mixture of 200 g (1.117 mole) of 2-chloro-6 fluorobenzyl chloride, 118 g (1.23 mole) of sodium t-butoxide, 2.2 mL (11 mmole) of 15-crown-5 (15-C-5) and 1.2 L of toluene was heated at reflux temperature for four hours. After allowing the reaction mixture to cool to 45° C., 600 mL of water was added followed by 90 mL of 2N HCl. After separation, the organic phase was concentrated in vacuo to give a dark oil. Distillation using a 5-tray Oldershaw column, sand bath to 155° C., gave 217.5 g of 1-chloro-3-fluoro-2-[(1,1-dimethylethoxy)methyl]-benzene as a clear liquid (bp 60-64° C./0.6 mm Hg.).

1. temperaturewas heated
2. temperatureat reflux temperature for four hours
3. customAfter separation
4. concentrationthe organic phase was concentrated in vacuo
5. customto give a dark oil
6. distillationDistillation
7. customto 155° C.