Ethylamine → 3-Chloro-2-fluorobenzoic acid

Participants

Reaction Steps

The trimethylsilyl ester of 3-chloro-2-fluorobenzoic acid (11.66 g) was prepared in 84% yield using the method described in Example 207. This ester (2.47 g) was converted to 0.45 g of 3-chloro-2-fluoro-6-(trimethylsilyl)benzoic acid in 18% yield using the method of Example 207. The crude product was converted to the acid chloride by the procedure of example b. The acid chloride was reacted with 70% aq ethylamine using General Method El to afford the title compound. Purification by flash chromatography (ethyl acetate/hexanes) followed by recrystallization from pentane gave 84 mg of the title compound as an off-white solid (18%). m.p. 96-97° C.

Provenance & Evidence