反应详情

A 200 mL round bottom flask was charged with 60% sodium hydride (2.5 g, 0.06 mol, 1.7 equivalents) and washed with hexane (50 mL). A solution of phenol (5.7 g, 0.06 mol, 1.6 equivalents) in diglyme (25 mL) was then slowly added to the sodium hydride. The reaction was maintained with stirring at room temperature for 1.5 hours. To the phenol anion solution was slowly added a solution of 2-chloro-3-nitro-N-[2-(3-pyridin-3-ylpropoxy)ethyl]-5,6,7,8-tetrahydroquinolin-4-amine (14.8 g, 0.04 mol) in diglyme (25 mL). The stirred reaction mixture was heated to 60° C. and maintained overnight. The reaction was quenched by pouring onto ice (1000 mL). The product oiled out of solution. The mixture was extracted with dichloromethane (4×100 mL). The combined extracts were concentrated to dryness. The residue was taken up in 1:1 hexane/ethyl acetate (250 mL) and washed with water (2×50 mL). The organic layer was concentrated to dryness. The residue was found to contain excess phenol. The phenol was removed by taking the residue up in diethyl ether (500 mL) and stirring over 10% sodium hydroxide (250 mL) overnight. The layers were separated. The ether layer was concentrated to provide 3-nitro-2-phenoxy-N-[2-(3-pyridin-3-ylpropoxy)ethyl]-5,6,7,8-tetrahydroquinolin-4-amine as a pale orange syrup (12.0 g, 71%). TLC=(10% MeOH/CH2Cl2, Rf=0.58).

1. washwashed with hexane (50 mL)
2. temperatureThe reaction was maintained
3. customThe stirred reaction mixture
4. temperaturewas heated to 60° C.
5. temperaturemaintained overnight
6. customThe reaction was quenched
7. additionby pouring onto ice (1000 mL)
8. extractionThe mixture was extracted with dichloromethane (4×100 mL)
9. concentrationThe combined extracts were concentrated to dryness
10. washwashed with water (2×50 mL)
11. concentrationThe organic layer was concentrated to dryness
12. customThe phenol was removed
13. stirringstirring over 10% sodium hydroxide (250 mL) overnight
14. customThe layers were separated
15. concentrationThe ether layer was concentrated