1797883-74-9Relevant academic research and scientific papers
Preparation method of high-purity flurbiprofen known impurities
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Paragraph 0036; 0037; 0038; 0039; 0040; 0041; 0042-0050, (2018/06/15)
The invention discloses a preparation method of high-purity flurbiprofen known impurities B. The preparation method comprises the following steps: enabling a tetrahydrofuran solution of 4-bromine-2-fluorobiphenyl as a starting material to perform Grignard reaction with magnesium, acidifying after coupled docking with side chain 2-bromo-2,3-sodium dimethyl succinate, preparing crude products of flurbiprofen impurities and performing re-crystallization on the high-purity flurbiprofen known impurities B, namely 2-(2-fluoro-4-biphenyl)-2,3-dimethylidene succinic acids. The preparation method disclosed by the invention is simple and convenient to operate, short in reaction time, high in product purity, high in yield and suitable for industrial production. The synthesized impurities B can be used for the qualitative and quantitative analysis on the impurities, so that the drug use safety of flurbiprofen is improved.
