反应详情

An example is disclosed in U.S. patent application Ser. No. 269,205. To a slurry of sodium hydride (0.4 g,17 mmol) in 20 ml ethylene glycol dimethyl ether cooled with an ice bath under an atmosphere of nitrogen, a solution of 2-benzyloxyethanol (2.1 ml, 15 mmol) and p-toluene sulfonyl chloride (2.9 g,15 mmol) in ethylene glycol dimethyl ether was added dropwise. When the addition was complete, the ice bath was removed and the solution stirred at room temperature for 18 hours. After dilution with diethyl ether, the resulting slurry was filtered through anhydrous magnesium sulfate and concentrated under vacuum to yield 3.6 g of crude 2-benzyloxyethyl p-toluenesulfonate.

1. additionWhen the addition
2. customthe ice bath was removed
3. filtrationAfter dilution with diethyl ether, the resulting slurry was filtered through anhydrous magnesium sulfate
4. concentrationconcentrated under vacuum