Reaktion #343666

Reaktionsgleichung

cumene

sodium

cumene hydroperoxide

sodium

1,3-diphenyl-3-methylbutane

styrene

cumene

→

1,3,5-triphenyl-5-methylhexane

Ausbeute 35.5%

Lösungsmittel

methanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeA one-liter glass flask equipped with a stirrer, a dropping funnel with a gas introduction conduit, a reflux condenser with a calcium chloride tube
2. 2
   workup.ADDITIONwhile introducing argon gas through the gas introduction conduit
3. 3
   workup.ADDITIONwas dropped
4. 4
   Temperaturwhile maintaining the temperature of the reaction system at 135°-140° C
5. 5
   workup.ADDITIONAfter dropwise addition
6. 6
   workup.STIRRINGthe reaction mixture was further stirred
7. 7
   Temperaturwhile heating for 1 hour
8. 8
   Temperaturcooled to room temperature
9. 9
   workup.STIRRINGwhile stirring
10. 10
    Sonstigethe contents were transferred to a separating funnel
11. 11
    Waschenwashed with water
12. 12
    SonstigeThe aqueous layer was removed

Vorschrift

A one-liter glass flask equipped with a stirrer, a dropping funnel with a gas introduction conduit, a reflux condenser with a calcium chloride tube, and a thermometer was charged with 240 grams (2.0 moles) of purified cumene, 4.0 grams (0.17 mole) of metallic sodium, and 3.6 grams (0.02 mole) of 80% cumene hydroperoxide while introducing argon gas through the gas introduction conduit, and the resulting mixture was heated to 135° C. A mixture of 69 grams (0.66 mole) of purified styrene and 60 grams (0.50 mole) of purified cumene was dropped thereto with stirring over 2 hours while maintaining the temperature of the reaction system at 135°-140° C. After dropwise addition was completed, the reaction mixture was further stirred while heating for 1 hour and then cooled to room temperature. An excess of metallic sodium was decomposed by dropping methanol in small portions while stirring. Introduction of argon gas was stopped, and the contents were transferred to a separating funnel and washed with water. The aqueous layer was removed, and the remaining oily layer was analyzed by gas chromatography. This gas chromatographic analysis showed that 67.6 grams (0.31 mole) of 1,3-diphenyl-3-methylbutane and 36.5 grams of (0.11 mole) of 1,3,5-triphenyl-5-methylhexane were formed. The total yield (per styrene) was 80 mole %.

Quelle