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    • 9. 发明授权
    • Optically active quaternary ammonium salt, process for producing the same, and process for producing optically active α-amino acid derivative with the same
    • 光活性季铵盐,其制备方法,以及与其制备光学活性α-氨基酸衍生物的方法
    • US07566779B2
    • 2009-07-28
    • US10563658
    • 2004-07-22
    • Keiji Maruoka
    • Keiji Maruoka
    • C07D223/14
    • C07D487/10C07C251/24C07F7/081C07F7/0814
    • There are provided (1) an optically active α-amino acid derivative, a stereoselectively useful intermediate for the synthesis of pharmaceutical or agrochemical products, which derivative is an optically active quaternary ammonium salt that, when used as an axially chiral spiro phase-transfer catalyst in the asymmetric alkylation of a glycine derivative, gives a high stereoselectivity toward substrates having a small molecule such as methyl iodide, or secondary alkyl halides, and a method for producing the same; and (2) a novel optically active quaternary ammonium salt that is a high performance axially chiral spiro phase-transfer catalyst used in the asymmetric alkylation of a glycine derivative, and in which each ring of the spiro-structure has the same structure that is advantageous in terms of the number of steps involved in the synthesis of the catalyst, and a method for producing the same and a method for recovering the same.(Solving means): To achieve the objects, (1) an axially chiral spiro-ammonium salt that incorporates an alkyl- or aryl-substituted silyl group as a substituent on the aromatic ring is used as a phase-transfer catalyst in the asymmetric alkylation of a glycine derivative, and (2) an axially chiral spiro-ammonium slat that incorporates a substituent encompassing a perfluoro alkyl group is used in the asymmetric alkylation of a glycine derivative and thereafter is recovered using a fluorous solvent.
    • 提供了(1)光学活性α-氨基酸衍生物,用于合成药物或农业化学产品的立体选择性有用的中间体,该衍生物是光学活性季铵盐,当用作轴向手性螺相转移催化剂 在甘氨酸衍生物的不对称烷基化中,对具有小分子的基质如甲基碘或仲烷基卤化物具有高立体选择性及其制备方法; 和(2)一种新型的光学活性季铵盐,其是用于甘氨酸衍生物的不对称烷基化的高性能轴向手性螺相转移催化剂,其中每个螺环结构的环具有相同的结构,这是有利的 关于催化剂合成所涉及的步骤数及其制造方法及其回收方法。 (解决方案)为了达到上述目的,(1)在芳环上含有烷基或芳基取代的甲硅烷基作为取代基的轴向手性螺 - 铵盐用作不对称烷基化中的相转移催化剂 的甘氨酸衍生物,和(2)在甘氨酸衍生物的不对称烷基化中使用包含全氟烷基的取代基的轴向手性螺 - 铵板条,然后使用氟溶剂回收。