反应详情

15.8 g (0.1 mol) of 5-isopropoxy-3-methyl-1-penten-3-ol and 20.0 g of mercuric acetate in 180 cc of ethyl vinyl ether are maintained at reflux temperature over the course of 4 days. 0.9 cc of glacial acetic acid is added at 20° to the turbid solution. After 3 hours 150 cc of 5 % potassium carbonate solution are added and the product is extracted with hexane. The hexane extract is dried with sodium sulphate and evaporated. The residue is heated to 165°-168° over the course of 11/2 hours without further purification and in an atomosphere of nitrogen; the residue is subsequently distilled at reduced pressure. The 7-isopropoxy-5-methyl-4-heptenal has a B.P. of 70°-73°/0.8 mm.

1. temperatureat reflux temperature over the course of 4 days
2. extractionthe product is extracted with hexane
3. extractionThe hexane extract
4. dry with materialis dried with sodium sulphate
5. customevaporated
6. temperatureThe residue is heated to 165°-168° over the course of 11/2 hours without further purification and in an atomosphere of nitrogen
7. distillationthe residue is subsequently distilled at reduced pressure