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    • 2. 发明授权
    • Synthesis of 7-acetyleno quinone methide derivatives and their application as vinylic polymerization retarders
    • 7-乙炔基醌甲基化物衍生物的合成及其作为乙烯基聚合缓凝剂的应用
    • US08884038B2
    • 2014-11-11
    • US13158958
    • 2011-06-13
    • Jonathan Masere
    • Jonathan Masere
    • C07C50/02C07C49/553C07C45/51C07C45/69
    • C07C7/20C07C45/512C07C45/69C08F2/40C08K5/005C09K15/06C09K15/08C07C49/647C07C49/683
    • The invention provides a method for synthesizing 7-Acetyleno quinone methide compounds that is safe and inexpensive. The method avoids the need for extremely cold reaction temperatures and unlike the prior art does not require any highly explosive materials. The method comprises the steps of: a) performing a condensation reaction between 3,5-di-tert-butyl-4-hydroxybenzaldehyde and a secondary amine thereby forming a secondary amine quinone methide intermediate; b) removing water from the secondary amine quinone methide intermediate by azeotropic distillation; c) adding the dehydrated secondary amine quinone methide intermediate to an organic medium containing a metal acetylide to form a Mannich base intermediate; and d) adding a release agent to the Mannich base intermediate to yield a 7-Acetyleno quinone methide.
    • 本发明提供一种安全且廉价的合成7-乙酰基醌甲基化合物的方法。 该方法避免了对极冷反应温度的需要,与现有技术不同,不需要任何高度爆炸性的材料。 该方法包括以下步骤:a)在3,5-二叔丁基-4-羟基苯甲醛与仲胺之间进行缩合反应,从而形成仲胺醌甲基化物中间体; b)通过共沸蒸馏从仲胺醌甲基中间体中除去水; c)将脱水的仲胺醌甲基化物中间体加入到含有金属乙炔化物的有机介质中以形成曼尼希碱中间体; 和d)向曼尼希碱中间体加入脱模剂以产生7-乙酰基醌甲基化物。