Tetraethylenepentamine → Dihydroxypropyl carbamate

Temperatur

-2 °C

The chloroformate of glycerol di(trichloroacetate), 42.3 g, is dissolved in 200 ml toluene. 300 g of a monosuccinimide dispersant composition (prepared by reacting 1 mole of polyisobutenyl succinic anhydride, where the polyisobutenyl group has a number average molecular weight of about 950, with 0.87 mole of tetraethylene pentaamine then diluting to about 50% actives in diluent oil) is dissolved in 200 ml toluene. Both solutions are cooled to below 0° C. (approximately -2° C.) using a salt ice-water bath. The solutions are poured together into a 2 l flask equipped with a mechanical stirrer and a drying tube. The reaction solution is mixed with strong stirring and kept below 0° C. for 40 minutes and then is allowed to warm to room temperature. After stirring at room temperature for several hours, about 65 mls of the reaction mixture is added to 130 mls hexane and 65 mls 1N NaOH in a separatory funnel in order to remove the trichloroacetate group. The mixture is intermittantly shaked for 30 minutes. After phase separation, the organic layer is washed several times with brine, is dried over anhydrous magnesium sulfate, is filtered and stripped to yield dihydroxypropyl carbamate derivatives of the monosuccinimide.

1. additionThe solutions are poured together into a 2 l flask
2. customequipped with a mechanical stirrer and a drying tube
3. additionThe reaction solution is mixed
4. temperatureto warm to room temperature
5. stirringAfter stirring at room temperature for several hours
6. customto remove the trichloroacetate group
7. waitThe mixture is intermittantly shaked for 30 minutes
8. customAfter phase separation
9. washthe organic layer is washed several times with brine
10. dry with materialis dried over anhydrous magnesium sulfate
11. filtrationis filtered

ORD-Eintrag

ord-08cacc25c00d46d2b618e30eb43b08f1

Quelldatensatz

uspto-grants-1988_05

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US04747850