反应 #55935

反应方程式

water

1-(m-methoxyphenyl)-7-(5-methyl-2-furyl)-3-heptyn-5-ol

water

sulphuric acid

→

3-methyl-2-[6-(m-methoxyphenyl)-2-hydroxy-3-hexynyl]-2-cyclopentenone

溶剂

acetic acid

反应条件

后处理

1. 1
   温度After cooling
2. 2
   萃取extracted with methylene chloride
3. 3
   洗涤The methylene chloride layer was washed with water
4. 4
   其他evaporated to dryness under reduced pressure
5. 5
   workup.DISSOLUTIONThe residue (10.60 g) was dissolved in 500 ml of about 0.1 N ethanolic potassium hydroxide solution
6. 6
   温度After cooling
7. 7
   workup.ADDITIONthe mixture was poured into 1000 ml water
8. 8
   萃取extracted with methylene chloride
9. 9
   洗涤The methylene chloride layer was washed with water
10. 10
    其他evaporated to dryness under reduced pressure

实验过程

A solution of 10.00 g (33.6 mmol) dl-1-(m-methoxyphenyl)-7-(5-methyl-2-furyl)-3-heptyn-5-ol in 20 ml acetic acid, about 10 ml water and 0.40 ml about 20% sulphuric acid was stirred under nitrogen in an oil-bath at 90° C. for about 24 hours. After cooling, the mixture was poured into 200 ml water and extracted with methylene chloride. The methylene chloride layer was washed with water and evaporated to dryness under reduced pressure. The residue (10.60 g) was dissolved in 500 ml of about 0.1 N ethanolic potassium hydroxide solution and stirred under nitrogen in an oil-bath at about 80° C. for about 1 hour. After cooling, the mixture was poured into 1000 ml water and extracted with methylene chloride. The methylene chloride layer was washed with water and evaporated to dryness under reduced pressure. Yield: 9.85 g.

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