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    • 2. 发明申请
    • METHOD FOR SYNTHESIZING COUMARIN AND THE DERIVATIVES THEREOF
    • 法合成香豆素及其衍生物的
    • WO2004002980A3
    • 2004-03-04
    • PCT/EP0306987
    • 2003-07-01
    • GRUENENTHAL GMBHHOELDERICH WOLFGANGLAUFER MONIKA CORNELIA
    • HOELDERICH WOLFGANGLAUFER MONIKA CORNELIA
    • C07D311/20
    • C07D311/20Y02P20/584
    • The invention relates to an environmentally friendly, heterocatalytic method for synthesizing coumarins based on phenols and carboxylic acids/carboxylic acid derivatives or ss-keto carboxylic acids/carboxylic acid derivatives. Alkylation of the aromatic phenol ring is assisted by an additional functional group of the carboxylic acids/carboxylic acid derivatives while the coumarin unit is formed. High yields can be obtained by using Nafion-silica composite materials. Particularly silica composites that are loaded with 20 to 80 percent of Nafion have a very high activity (compared with pure Nafion resin) due to the high number of acidic cores in connection with the improved active surface thereof. An efficient Pechmann reaction can be carried out by simple preparation in toluene, the catalyst being recyclable and/or regenerable.
    • 本专利申请描述了一种用于从苯酚和羧酸/羧酸衍生物或β-酮羧酸/羧酸衍生物开始香豆素的合成中的生态友好的非均相催化过程。 通过羧酸/羧酸衍生物的另一种官能团,芳族酚环的烷基化被支撑在形成香豆素单元的。 通过使用的Nafion - 二氧化硅复合材料,高产量可以实现的。 载货特别是与由大量酸中心的与所述增强的活性表面积(相对于纯的Nafion树脂)具有非常高活性的连接证明20-80%的Nafion二氧化硅的复合材料。 一种高效pechmann缩合反应通过简单的在甲苯中,与催化剂的可追踪性和/或再生工作起来是可能的。