反应 #927244

反应方程式

Hexane

water

1,6-dibromohexane

sodium methoxide

1,6-dibromohexane

sodium methoxide

→

6-bromohexyl methyl ether

收率 93.0%

溶剂

methanol

反应条件

后处理

1. 1
   workup.WAITthe reaction mixture was held an additional hour
2. 2
   洗涤the organic phase was washed with brine
3. 3
   干燥dried with magnesium sulfate
4. 4
   过滤filtered
5. 5
   workup.DISTILLATIONFractional distillation under vacuum

实验过程

6-Bromohexyl methyl ether was prepared from 1,6-dibromohexane. To 48.8 g (200 mmol) of 1,6-dibromohexane at 60° C. was added 44 g (200 mmol) of a 25% solution of sodium methoxide in methanol. The reaction mixture was held 0.5 hours, then an additional 4 g of sodium methoxide solution was added, and the reaction mixture was held an additional hour. Hexane and water were added, the organic phase was washed with brine and dried with magnesium sulfate, filtered and stripped. Fractional distillation under vacuum gave 93% pure 6-bromohexyl methyl ether. This bromide was converted to the Grignard reagent, which was converted to 1-(7-methoxyheptyl)-cyclopropene in the same manner that pentylmagnesium bromide was converted to 1-hexylcyclopropene.

来源