Reaktion #41762

Reaktionsgleichung

dimethyl sulfate

5-fluoro-2-nitrophenylamine

trifluoroacetic anhydride

trifluoroacetamide

sodium hydroxide

→

(5-fluoro-2-nitrophenyl)methylamine

Lösungsmittel

methylenechloride

toluene

acetonitrile

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe mixture was quenched with saturated sodium bicarbonate solution
2. 2
   SonstigeThe organic layer was separated
3. 3
   Waschenwashed with water, brine
4. 4
   Sonstigedried
5. 5
   Sonstigeevaporated
6. 6
   workup.STIRRINGThe biphasic mixture was stirred overnight at room temperature
7. 7
   Sonstigeevaporated
8. 8
   Waschenwashed with water, brine
9. 9
   Sonstigedried
10. 10
    Sonstigeevaporated
11. 11
    SonstigeThe crude was purified by column chromatography
12. 12
    Wascheneluting with 1:1 hexanes and ethyl acetate

Vorschrift

A solution of 5-fluoro-2-nitrophenylamine (1 eq) in methylenechloride was treated with trifluoroacetic anhydride (1 eq) and stirred for 10 minutes at 0° C. The mixture was quenched with saturated sodium bicarbonate solution. The organic layer was separated and washed with water, brine, dried and evaporated. To the solution of the trifluoroacetamide (1 eq) in a mixture of toluene, acetonitrile and sodium hydroxide solution (50%) was added benzyltrimethylammonium chloride (1 eq) and dimethyl sulfate (1.2 eq). The biphasic mixture was stirred overnight at room temperature and evaporated. The mixture was taken up in ethyl acetate, washed with water, brine, dried and evaporated. The crude was purified by column chromatography eluting with 1:1 hexanes and ethyl acetate to afford (5-fluoro-2-nitrophenyl)methylamine. MS: MH+=170.

Quelle