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ChemicalBook CAS DataBase List 4-Fluoro-2-nitrobenzoic acid
394-01-4

4-Fluoro-2-nitrobenzoic acid synthesis

7synthesis methods
-

Yield:394-01-4 81%

Reaction Conditions:

with water;hydrogen bromide at 130; for 6.5 h;

Steps:

19.a Example 19; 2-[7-(3-FLUORO-BENZYLOXY)-2-METHYL-4-OXO-4H-QUINAZOLIN-3-YL]-ACETAMIDE; a) 4-Fluoro-2-nitro-benzoic acid
A mixture of 4-fluoro-2-nitro-benzonitrile (12.2 g, 73.7 mmol) suspended in HBr (48%, 74.5 mL, 664 mmol) was heated at 130 °C for 6.5 h. After cooling to rt water (1 L) was added and the resulting precipitate was washed with water and hexane to afford the title compound (11.0 g, 81%) as a light brown solid. MS: M/E = 183.9 (M-H).

References:

F. HOFFMANN-LA ROCHE AG WO2004/54985, 2004, A1 Location in patent:Page 17

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