Uses
Methyl 3-bromo-5-nitrobenzoate is a pharmaceutical intermediate. Methyl 3-bromo-5-nitrobenzoate can be used to prepare 3-amidobenzoic acid derivatives such as 3-(4-trifluoromethylbenzoyl)amino-5-(2',6'-(2H)piperidinylphenyl)benzoic acid, which have P2Y receptor antagonist effects.
Synthesis
The preparation method is achieved through a two-step reaction: first, at 0°C, 3-nitrobenzoic acid is dissolved in concentrated sulfuric acid, N-bromosuccinimide is added, the reaction is carried out at 65°C for 2 hours, and 3-nitro-5-bromobenzoic acid is obtained after stirring with ice water, suction filtration, and drying, with a yield of 95%. Next, the product is dissolved in methanol, SOCl₂ is added dropwise at 0°C, the reaction is carried out at room temperature for 2 hours, and Methyl 3-bromo-5-nitrobenzoate is finally obtained after treatment with a sodium bicarbonate solution, extraction with ethyl acetate, drying, and column chromatography purification, with a yield of 86.46%.
References
[1] Chemistry - A European Journal, 2006, vol. 12, # 18, p. 4764 - 4774
[2] Journal of the American Chemical Society, 2013, vol. 135, # 46, p. 17408 - 17416
[3] Patent: WO2014/19685, 2014, A1. Location in patent: Page/Page column 13; 39
[4] Journal of Molecular Structure, 2013, vol. 1036, p. 505 - 509
[5] Collection of Czechoslovak Chemical Communications, 1973, vol. 38, p. 3496 - 3505
