Ammonium Hydroxide → 6-methoxy-5-(trifluoromethyl)-4-Pyrimidinamine

Participants

Reaction Conditions

Reaction Steps

To a solution of 4-fluoro-6-methoxy-5-(trifluoromethyl)pyrimidine (N-2) (1.10 g, 5.61 mmol) in n-butanol (4 mL) in a pressure vessel, ammonium hydroxide (5 mL) is added and the resulting mixture is stirred at 90° C. for 1 h. The mixture is allowed to cool to RT, quenched with water, and extracted with ethyl acetate (100 mL×2). The combined organic layers are washed with brine, dried over Na2SO4 and filtered. The filtrate is concentrated in vacuo to afford the product 6-methoxy-5-(trifluoromethyl)pyrimidin-4-amine (N-3) as an off-white solid. The product is used directly in the next step without further purification.

Provenance & Evidence