Method for producing epoxide crystal
    9.
    发明授权
    Method for producing epoxide crystal 失效
    环氧化物晶体的制备方法

    公开(公告)号:US06765100B2

    公开(公告)日:2004-07-20

    申请号:US09973191

    申请日:2001-10-10

    IPC分类号: C07D30124

    摘要: The invention relates to a method for industrially producing highly pure (2R, 3S)- or (2S, 3R)-N-carbamate-protected &bgr;-aminoepoxide (crystal) or (2R, 3S)- or (2S, 3R)-N-carbamate-protected &bgr;-aminoalcohol. The method for producing N-carbamate-protected &bgr;-aminoepoxide crystal, includes one or more of the following steps (a) to (d): (a) dissolving (2R, 3S)- or (2S, 3R)-N-carbamate-protected &bgr;-aminoalcohol containing at least the diastereomer as an impurity in a solvent including at least one or more selected from aromatic hydrocarbon solvent, saturated hydrocarbon solvent, aqueous mixture solvent, acetone and 2-propanol, to remove insoluble matters; (b) treating the (2R, 3S)- or (2S, 3R)-N-carbamate-protected &bgr;-aminoalcohol with a base, thereby converting the N-carbamate-protected &bgr;-aminoalcohol to (2R, 3S)- or (2S, 3R)-N-carbamate-protected &bgr;-aminoepoxide; (c) treating the (2R, 3S)- or (2S, 3R)-N-carbamate-protected &bgr;-aminoepoxide containing at least the diastereomer as an impurity with an acid, thereby converting the diastereomer as an impurity to (4S, 5R) or (4R, 5S) oxazolidin-2-one derivative, and optionally separating and removing the resulting oxazolidin-2-one derivative in water or an aqueous mixture solvent; and (d) crystallizing the (2R, 3S)- or (2S, 3R)-N-carbamate-protected &bgr;-aminoepoxide in a mixture solvent of water and water-miscible organic solvent. By the methods of the present invention, highly pure (2R, 3S)- or (2S, 3R)-N-carbamate-protected &bgr;-aminoepoxide or (2R, 3S) or (2S, 3R)-N-carbamate-protected &bgr;-aminoalcohol can be efficiently produced.

    摘要翻译: 本发明涉及工业生产高纯度(2R,3S) - 或(2S,3R)-N-氨基甲酸酯保护的β-氨基环氧化物(晶体)或(2R,3S) - 或(2S,3R)-N 氨基甲酸酯保护的β-氨基醇。 制备N-氨基甲酸酯保护的β-氨基环氧化物晶体的方法包括一个或多个以下步骤(a)至(d):( a)将(2R,3S) - 或(2S,3R)-N-氨基甲酸酯 在包含至少一种或多种选自芳族烃溶剂,饱和烃溶剂,含水混合物溶剂,丙酮和2-丙醇的溶剂的溶剂中至少含有作为杂质的非对映体的β-保护的β-氨基醇,以除去不溶物;(b) 用碱处理(2R,3S) - 或(2S,3R)-N-氨基甲酸酯保护的β-氨基醇,从而将N-氨基甲酸酯保护的β-氨基醇转化为(2R,3S) - 或(2S,3R )-N-氨基甲酸酯保护的β-氨基环氧化物;(c)用酸处理至少含有非对映体作为杂质的(2R,3S) - 或(2S,3R)-N-氨基甲酸酯保护的β-氨基环氧化物,由此 将非对映异构体作为杂质转化为(4S,5R)或(4R,5S)恶唑烷-2-酮衍生物,任选分离和除去得到的恶唑烷-2-酮衍生物 在水或含水混合溶剂中; 和(d)在水和水混溶性有机溶剂的混合溶剂中结晶(2R,3S) - 或(2S,3R)-N-氨基甲酸酯保护的β-氨基环氧化物。 通过本发明的方法,高纯度(2R,3S) - 或(2S,3R)-N-氨基甲酸酯保护的β-氨基环氧化物或(2R,3S)或(2S,3R)-N-氨基甲酸酯保护的β - 氨基醇可以有效地生产。