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    • 7. 发明专利
    • Method for reducing halogen-substituted benzoate ester using ruthenium carbonyl complex
    • 使用碳酸氢钠复合物还原卤代烃取代苯甲酸酯的方法
    • JP2014114257A
    • 2014-06-26
    • JP2012270942
    • 2012-12-12
    • Takasago Internatl Corp高砂香料工業株式会社
    • HORI KIYOTOOGATA TADASHIKURIYAMA WATARU
    • C07C29/149C07B61/00C07C33/46
    • C07C51/60C07C29/149C07C33/46
    • PROBLEM TO BE SOLVED: To provide a method for reducing a benzoate ester in which dehalogenation is suppressed using an easily available catalyst.SOLUTION: There is provided a method for reducing a benzoate ester in which dehalogenation is suppressed in which an ester group in a benzoate ester in which an aromatic ring is replaced by a halogen atom is reduced by hydrogen gas using an aromatic hydrocarbon as a solvent in the presence of a ruthenium complex represented by the following formula (1) to produce benzyl alcohol in which an aromatic ring is replaced by a halogen atom: RuXY(CO)(L) (1) (wherein, X and Y each represent an anionic ligand and L represents a three-dentate aminodiphosphine ligand represented by the following formula (2).) (wherein, R, R, Rand Rindividually may be the same or different and each represent an alkyl group, a cycloalkyl group, an aryl group or the like; Qand Qmay be the same or different and each represent a divalent alkylene group which may have a substituent, a divalent cycloalkylene group which may have a substituent or the like.)
    • 要解决的问题:提供一种还原苯甲酸酯的方法,其中使用容易获得的催化剂抑制脱卤。解决方案:提供一种降低苯甲酸酯的方法,其中抑制脱卤化苯甲酸酯,其中苯甲酸酯基 在由下式(1)表示的钌络合物的存在下,使用芳烃作为溶剂,通过氢气使芳烃环被卤原子取代的酯被还原,得到其中芳环被取代的苯甲醇 通过卤素原子:RuXY(CO)(L)(1)(其中,X和Y各自表示阴离子配体,L表示由下式(2)表示的三齿氨基二膦配体)(其中,R, R,Rand可以相同或不同,各自表示烷基,环烷基,芳基等; Q和Q可以相同或不同,表示可以具有取代基的二价亚烷基 可以是可以具有取代基的二价亚环烷基等。)