Reaktion #514288

Reaktionsgleichung

butyl-lithium

lithium

butyl bromide

indene

ethylene oxide

lithium

→

2-(1-Indenyl)ethanol

Lösungsmittel

ether

ether

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe above compound is prepared
2. 2
   workup.ADDITIONis added
3. 3
   TemperaturAfter warming to 10°
4. 4
   workup.STIRRINGstirring
5. 5
   SonstigeThe layers are separated
6. 6
   Waschenthe organic layer is washed once with dilute HCl and three times with water
7. 7
   TrocknenAfter drying the ether
8. 8
   Sonstigeis removed
9. 9
   workup.DISTILLATIONthe product distilled
10. 10
    Sonstigecollecting 76 g (48%) at 125-135/0.2 mm

Vorschrift

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.

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