反应详情

温度

0 °C

15 ml of 4-pentin-1-ol is added in drops at 0° C. to a suspension of 17.4 g of sodium hydride (55%) in 200 ml of DMF, and it is stirred for 1 hour at 0° C. Then, 30 ml of benzyl bromide is added in drops at this temperature, and it is stirred for another 2 hours at 0° C. Then, the reaction is carefully neutralized with 1N hydrochloric acid. The phase separation is carried out between diethyl ether and water, and the aqueous phase is extracted several times with diethyl ether. The combined organic phases are washed with water, saturated sodium bicarbonate solution and saturated sodium chloride solution, dried on magnesium sulfate and concentrated by evaporation. The residue is distilled in an oil pump vacuum, and 22.7 g of 5-benzyloxypent-1-ine is obtained as a colorless oil.

1. stirringis stirred for another 2 hours at 0° C
2. customThe phase separation
3. extractionthe aqueous phase is extracted several times with diethyl ether
4. washThe combined organic phases are washed with water, saturated sodium bicarbonate solution and saturated sodium chloride solution
5. customdried on magnesium sulfate
6. concentrationconcentrated by evaporation
7. distillationThe residue is distilled in an oil pump vacuum