反应详情

To a three-necked, 2-liter round bottom flask equipped with a Dean-Stork trap were added 3 -dimethylamino-1,2 -propanediol (6.08 g, 51.1 mmoles), xylene (1300 ml) and KOH (8.0 g). The solution was refluxed for 2 hours while removing water azeotropically via the Dean-Stork trap. Oleyl mesylate (40.0 g, 115.6 mmoles) in 100 ml xylene was added to the reaction mixture drop-wise in 30 minutes. Refluxing was continued for 3 hours and the reaction mixture concentrated to a gum. The gum was triturated with 400 ml hexane and filtered. The solid was washed with 100 ml hexane followed with 200 ml ethyl acetate. The filtrates were combined, concentrated and subjected to f lash chromatography. 2,3-dioleyloxy-1- (N, N-dimethylamino) propane was obtained as a colorless oil in 76% yield, TLC: Rf =0.37 (Silica gel: 5% EtOAc: hexane); IR: 2925, 2850, 1469, 1120, 1040 cm-1 ; HNMR (CDCl3) δ 5.35 (t, 4H) , 4.13 (q, 1H) 3.4-3.65 (m, 6H), 2.35-2.45 (m, 2H) , 2.25 (S, 6H) , 1.95-2.05 (m, 8H) , 1.5-1.65 (m, 4H) , 1.2-1.45 (m, 4H) 0.9 (t, 6H).

1. customTo a three-necked, 2-liter round bottom flask equipped with a Dean-Stork trap
2. temperatureThe solution was refluxed for 2 hours
3. customwhile removing water azeotropically via the Dean-Stork trap
4. temperatureRefluxing
5. concentrationthe reaction mixture concentrated to a gum
6. customThe gum was triturated with 400 ml hexane
7. filtrationfiltered
8. washThe solid was washed with 100 ml hexane
9. concentrationconcentrated