反应详情

(0.5 mole) of prop-1-ynyltetrahydropyranyl ether in 200 ml of dimethyl sulfoxide were added with stirring to a solution of 11.5g. (0.5 mole) of lithium amide in 200 ml of dimethyl sulfoxide. Stirring was continued for 1 hour and 5-methylhexyl bromide 89g. (0.5 mole) were added over 45 min. External cooling was necessary to keep the temperature at 30° C. After 3 hours, the mixture was poured into 1 liter of ice-water. The mixture was extracted with petrol-ether, and the organic phase washed with 10% sulfuric acid, and then water. The solution was dryed over magnesium sulfate concentrated and distilled at 100°-103° C/0.01mm to give 82.6 (70%) of 8-methylnon-2-ynyl tetrahydropyranyl ether.

1. stirringStirring
2. addition(0.5 mole) were added over 45 min
3. temperatureExternal cooling
4. customat 30° C
5. waitAfter 3 hours
6. extractionThe mixture was extracted with petrol-ether
7. washthe organic phase washed with 10% sulfuric acid
8. concentrationconcentrated
9. distillationdistilled at 100°-103° C/0.01mm