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    • 43. 发明授权
    • Process for preparing highly pure formylphenylboronic acids
    • 制备高纯度甲酰基苯基硼酸的方法
    • US06420597B2
    • 2002-07-16
    • US09897566
    • 2001-07-02
    • Frank VollmüllerAndreas MeudtStefan Scherer
    • Frank VollmüllerAndreas MeudtStefan Scherer
    • C07F502
    • C07F5/025
    • A process for purifying formylphenylboronic acids of the formula (I) where the formyl function is located in the ortho, meta or para position relative to the boronic acid function, by dissolving the crude formylphenylboronic acids in an alkaline solvent having a pH in the range from 8 to 11 separating off the insoluble organic impurities and subsequently acidifying the alkaline boronic acid solution and separating off and working up the precipitated boronic acid. The crude formylphenylboronic acid is preferably dissolved in aqueous alkali metal or alkaline earth metal oxide, hydroxide, carbonate or phosphate solutions at temperatures in the range from 5 to 50° C. The formylphenylboronic acids obtained have a purity of ≧99% and are suitable as precursors for liquid-crystalline compounds, as liquid crystals or as constituents of liquid-crystalline mixtures or as pharmaceutical intermediates.
    • 通过将粗甲酰基苯基硼酸溶解在碱性溶剂中,其中pH为在下列范围内,其中甲酰基官能位于相对于硼酸官能团的邻位,间位或对位的式(I)的甲酰基苯基硼酸的方法 分离出不溶性有机杂质,然后酸化碱性硼酸溶液,分离和处理沉淀的硼酸。 粗甲酰基苯基硼酸优选在5至50℃的温度范围内溶解在碱金属或碱土金属氧化物,氢氧化物,碳酸盐或磷酸盐水溶液中。得到的甲酰基苯基硼酸的纯度> 99%,适用 作为液晶化合物的前体,作为液晶或作为液晶混合物的组分或作为药物中间体。