反应详情

The above compound is prepared as described by Howell & Taylor, J.C.S., 1957, 3013. To butyl-lithium, prepared from lithium (20.0 g.) and butyl bromide (234 g.) in ether, indene (116 g., 1.0 M) is added with stirring under nitrogen at -10°. After 1 hour at -10° ethylene oxide (88 g.) in ether (300 ml.) is added in 1/2 hour. After warming to 10°, 500 ml. water is added cautiously and stirring is continued until there is no lithium remaining. The layers are separated and the organic layer is washed once with dilute HCl and three times with water. After drying, the ether is removed and the product distilled, collecting 76 g. (48%) at 125-135/0.2 mm. N.M.R. establishes the position of the double bond as 2,3.

1. customThe above compound is prepared
2. additionis added
3. temperatureAfter warming to 10°
4. stirringstirring
5. customThe layers are separated
6. washthe organic layer is washed once with dilute HCl and three times with water
7. customAfter drying
8. customthe ether is removed
9. distillationthe product distilled
10. customcollecting 76 g