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    • 7. 发明授权
    • Method for reducing halogenobenzoic acid ester using ruthenium carbonyl complex
    • 使用钌羰基络合物还原卤代苯甲酸酯的方法
    • US08846983B2
    • 2014-09-30
    • US14100163
    • 2013-12-09
    • Takasago International Corporation
    • Kiyoto HoriOsamu OgataWataru Kuriyama
    • C07C29/149C07C51/60
    • C07C51/60C07C29/149C07C33/46
    • An object of the present invention is to provide a method for reducing a halogenobenzoic acid ester, in which dehalogenation is inhibited, by using a readily available catalyst. The method comprises reducing an ester with hydrogen gas by using an aromatic hydrocarbon as a solvent in the presence of a ruthenium complex represented by the following general formula (1): RuXY(CO)(L)  (1) where X and Y represent monovalent anionic ligands, and L represents a tridentate aminodiphosphine ligand represented by the following general formula (2): where RZ1 represents an alkyl group having 1 to 4 carbon atoms, each RZ2 represents an alkyl group having 1 to 4 carbon atoms or a halogen atom, any adjacent two RZ2s may form a ring, Hal represents a halogen atom, and n represents 0 to 4.
    • 本发明的目的是提供一种通过使用容易获得的催化剂来还原其中脱卤被抑制的卤代苯甲酸酯的方法。 该方法包括在由以下通式(1)表示的钌络合物存在下,通过使用芳族烃作为溶剂,用氢气还原酯:RuXY(CO)(L)(1)其中X和Y表示一价 阴离子配位体,L表示由以下通式(2)表示的三齿氨基二膦配体:其中RZ1表示碳原子数1〜4的烷基,各RZ2表示碳原子数为1〜4的烷基或卤素原子, 任何相邻的两个RZ2可以形成环,Hal表示卤素原子,n表示0至4。