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ChemicalBook CAS DataBase List 2-Fluorobenzoic acid
445-29-4

2-Fluorobenzoic acid synthesis

12synthesis methods
The preparation of 2-fluorobenzoic acid is based on anthranilic acid as raw material, adding anhydrous hydrogen fluoride and sodium nitrite in methoxyethyl methyl ether solvent for diazotization, refluxing for 3 hours, and post-processing to obtain the finished product.
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Yield:445-29-4 95%

Reaction Conditions:

with oxygen;Cu(OAc)2*H2O;Co(OAc)2.4H2O in lithium hydroxide monohydrate at 70; under 760.051 Torr; for 12 h;

Steps:

10 Example 10 Preparation of o-fluorobenzoic acid by oxidation of o-fluorobenzaldehyde

Under normal pressure oxygen, water (2mL), o-fluorobenzaldehyde (1mmol), Cu(OAc)2· H2O (0.03mmol, 3% mole fraction) and Co(OAc)2· 4H2O (0.03mmol, 3% mole fraction) was added to a 15mL glass reaction tube, and an oxygen balloon was connected.The reaction tube was placed in an oil bath heated to 70°C in advance and stirred for 12 hours. After the reaction was completed, the temperature was lowered, the crude product solid was separated by centrifugation, and then ultrasonically washed with 3 mL of water, centrifuged and dried to constant weight to obtain the target product. The separation yield was 95 %.

References:

CN111116348,2020,A Location in patent:Paragraph 0030-0031

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