反应详情

Aluminum stearate, Al[CH3(CH2)16CO2]3, (10.0 g, Fisher Scientific Co., Pittsburgh, Pa., technical grade) was placed in a 250 mL round bottomed flask equipped with a magnetic stir bar and a reflux condenser. Toluene (50 mL) was added to give a white slurry. Separately, a 6.0 g sample of 8-hydroxyquinoline (41.3 mmol) was dissolved in 150 mL of toluene and the solution was gravity filtered through a coarse glass frit into the reaction flask. This removed an insoluble minor impurity found in the 8-hydroxyquinoline. After the addition of the 8-hydroxyquinoline to the aluminum stearate-toluene solution, the reaction flask was heated to reflux by means of an electric heating mantle. As the reaction warmed, but prior to refluxing, a large quantity of a fine yellow solid precipitated. The reaction mixture was refluxed for approximately 72 hours, cooled, and filtered. The yellow filter cake was washed sequentially with two 50 mL portions of toluene and two 50 mL portions of petroleum ether. After vacuum drying, the filter cake provided 5.4 g of tris(8-quinolinolato)aluminum as fine yellow needles. An 1H-NMR of the product precipitated from the toluene reaction mixture showed no significant resonances other than those of the desired product.

1. customequipped with a magnetic stir bar and a reflux condenser
2. customto give a white slurry
3. filtrationfiltered through a coarse glass frit into the reaction flask
4. customThis removed an insoluble minor impurity
5. additionAfter the addition of the 8-hydroxyquinoline to the aluminum stearate-toluene solution
6. temperaturethe reaction flask was heated
7. temperatureto reflux by means of an electric heating mantle
8. temperatureAs the reaction warmed
9. temperatureto refluxing
10. customa large quantity of a fine yellow solid precipitated
11. temperatureThe reaction mixture was refluxed for approximately 72 hours
12. temperaturecooled
13. filtrationfiltered
14. washThe yellow filter cake was washed sequentially with two 50 mL portions of toluene and two 50 mL portions of petroleum ether
15. customAfter vacuum drying