Dimethyl Sulfate → (5-Fluoro-2-nitrophenyl)methanamine

Temperature

0 °C

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.

1. customThe mixture was quenched with saturated sodium bicarbonate solution
2. customThe organic layer was separated
3. washwashed with water, brine
4. customdried
5. customevaporated
6. stirringThe biphasic mixture was stirred overnight at room temperature
7. customevaporated
8. washwashed with water, brine
9. customdried
10. customevaporated
11. customThe crude was purified by column chromatography
12. washeluting with 1:1 hexanes and ethyl acetate

ORD record

ord-827e1e82bae44d098f4df3544470df9d

Source dataset

uspto-grants-2010_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07728010B2