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    • 9. 发明授权
    • Selective catalytic oxybromination of hydroxyaromatic compounds
    • 羟基芳族化合物的选择性催化氧溴化
    • US07022886B2
    • 2006-04-04
    • US10650567
    • 2003-08-28
    • Grigorii Lev Soloveichik
    • Grigorii Lev Soloveichik
    • C07C39/24
    • C07B39/00C07C37/62C07C39/27
    • A method for selectively brominating hydroxyaromatic compounds is disclosed. Hydroxyaromatic compounds are contacted with oxygen and a bromine source, in an acidic medium, in the presence of a catalyst selected from the group of compounds and mixtures of compounds of Group IV–VIII transition metals of the Periodic Table of Elements. The selectivity of mono-brominated products produced, predominantly in the para-position, from the method using transition metal compounds as catalysts is significantly higher than that of known methods using other catalysts. Thus, there is a significant reduction in the production of undesirable dibrominated and more highly brominated by-products.
    • 公开了选择性溴化羟基芳族化合物的方法。 羟基芳族化合物在酸性介质中,在选自元素周期表第IV-VIII族过渡金属化合物和混合物的催化剂存在下,与氧和溴源接触。 从使用过渡金属化合物作为催化剂的方法中主要在对位产生的单溴化产物的选择性显着高于使用其它催化剂的已知方法的选择性。 因此,不希望的二溴和更高溴化的副产物的生产显着减少。