Process for the preparation of 3-hydroxytetrahydrofuran
    4.
    发明授权
    Process for the preparation of 3-hydroxytetrahydrofuran 失效
    3-羟基四氢呋喃的制备方法

    公开(公告)号:US06359155B1

    公开(公告)日:2002-03-19

    申请号:US09719686

    申请日:2001-02-15

    IPC分类号: C07D30720

    摘要: An industrial advantage process for producing high-purity 3-hydroxytetrahydrofuran easily and simply, which comprises reducing a 4-halo-3-hydroxybutyric acid ester (1) with a boron hydride compound and/or an aluminum hydride compound as a reducing agent in an organic solvent immiscible with water; treating the reaction mixture with an acid and water to thereby effect conversion to the corresponding 4-halo-1,3-butanediol and at the same time giving an aqueous solution containing said compound; carrying out the cyclization reaction of the 4-halo-1,3-butanediol in said aqueous solution; extracting the resulting 3-hydroxytetrahydrofuran from the 3-hydroxytetrahydrofuran-containing aqueous solution using an organic solvent immiscible with water; and isolating the 3-hydroxytetrahydrofuran by concentration and/or distillation of the solution obtained.

    摘要翻译: 用于容易且简单地生产高纯度3-羟基四氢呋喃的工业优势方法,其包括用硼氢化合物和/或氢化铝化合物作为还原剂还原4-卤代-3-羟基丁酸酯(1) 与水不混溶的有机溶剂;用酸和水处理反应混合物,从而转化为相应的4-卤代-1,3-丁二醇,同时得到含有所述化合物的水溶液;进行环化反应 所述水溶液中的4-卤代-1,3-丁二醇;使用与水不混溶的有机溶剂从含3-羟基四氢呋喃的水溶液中萃取所得3-羟基四氢呋喃; 通过所得溶液的浓缩和/或蒸馏来使3-羟基四氢呋喃分离。

    Method for producing (R)-3-[4-(trifluoromethyl) phenylamino]-pentanoic acid amide derivative
    8.
    发明授权
    Method for producing (R)-3-[4-(trifluoromethyl) phenylamino]-pentanoic acid amide derivative 失效
    (R)-3- [4-(三氟甲基)苯基氨基] - 戊酸酰胺衍生物的制备方法

    公开(公告)号:US07223859B2

    公开(公告)日:2007-05-29

    申请号:US10801141

    申请日:2004-03-16

    IPC分类号: C07D205/02 C07C233/00

    摘要: The present invention provides a method for easily producing an (R)-3-[4-(trifluoromethyl)phenylamino]-pentanoic acid amide derivative useful for an intermediate for pharmaceutical products, particularly an inhibitor of a cholesteryl ester transfer protein (CETP) from easily available raw materials. In the present invention, (S)-N-[4-(trifluoromethyl)phenyl]-3-hydroxypentanoic acid amide prepared from easily available raw materials leads a production of (R)-4-ethyl-1-[4-(trifluoromethyl)phenyl]-2-azetidinone to give (R)-3-[4-(trifluoromethyl)phenylamino]-pentanoic acid amide. Furthermore, (R)-4-ethyl-1-[4-(trifluoromethyl)phenyl]-2-azetidinone is reacted with a carbamic acid ester to give an (R)-3-[4-(trifluoromethyl)phenylamino]-pentanoic acid amide derivative.

    摘要翻译: 本发明提供了一种容易地制备用于药物产品中间体(特别是胆固醇酯转移蛋白(CETP)抑制剂)的(R)-3- [4-(三氟甲基)苯基氨基] - 戊酸酰胺衍生物的方法, 容易获得的原料。 在本发明中,由容易获得的原料制备的(S)-N- [4-(三氟甲基)苯基] -3-羟基戊酸酰胺导致(R)-4-乙基-1- [4-(三氟甲基) )苯基] -2-氮杂环丁酮,得到(R)-3- [4-(三氟甲基)苯基氨基] - 戊酸酰胺。 此外,将(R)-4-乙基-1- [4-(三氟甲基)苯基] -2-氮杂环丁酮与氨基甲酸酯反应,得到(R)-3- [4-(三氟甲基)苯基氨基] - 戊酸 酰胺衍生物。

    Process for cyclizing optically active 4-amino-2-halogenobutyric acids
    9.
    发明授权
    Process for cyclizing optically active 4-amino-2-halogenobutyric acids 失效
    环化光学活性4-氨基-2-卤代丁酸的方法

    公开(公告)号:US06747161B2

    公开(公告)日:2004-06-08

    申请号:US10182649

    申请日:2002-11-01

    IPC分类号: C07D20500

    CPC分类号: C07D205/04

    摘要: The invention provides a process for producing optically active azetidine-2-carboxylic acid with good efficiency, expedience, and commercial advantage, which comprises cyclizing an optically active 4-amino-2-halogenobutyric acid in an optical yield of as high as 90% or more. It is a process for producing optically active azetidine-2-carboxylic acid of the general formula (2), in which * denotes an asymmetric carbon atom, which comprises cyclizing an optically active 4-amino-2-halogenobutyric acid of the general formula (1), in which X represents a halogen atom and * denotes an asymmetric carbon atom, in the presence of an oxide of an alkaline earth metal, a hydroxide of an alkaline earth metal excepting barium, or an organic amine.

    摘要翻译: 本发明提供了一种以高效率,便利和商业优点制备光学活性氮杂环丁烷-2-羧酸的方法,该方法包括使光学活性4-氨基-2-卤代丁酸以高达90%的光学收率环化;或 它是制备通式(2)的光学活性氮杂环丁烷-2-羧酸的方法,其中*表示不对称碳原子,其包括使一般的光学活性4-氨基-2-卤代丁酸环化 在碱土金属的氧化物,除了钡以外的碱土金属的氢氧化物或有机胺的存在下,式(1)中X表示卤素原子,*表示不对称碳原子。

    Process for preparing an enol silyl ether compound
    10.
    发明授权
    Process for preparing an enol silyl ether compound 失效
    制备固体硅胶化合物的方法

    公开(公告)号:US5071966A

    公开(公告)日:1991-12-10

    申请号:US576499

    申请日:1990-09-10

    IPC分类号: C07F7/02 C07F7/18

    CPC分类号: C07F7/186 C07F7/1852

    摘要: A process for preparing an enol silyl ether compound from a diazoacetoacetic acid ester having the general formula (IV): ##STR1## wherein R.sup.1 is a lower alkyl group having 1 to 6 carbon atoms, phenyl group, a substituted phenyl group, an aralkyl group or allyl group, and R.sup.2, R.sup.3 and R.sup.4 are the same or mutually different and each is a lower alkyl group having 1 to 6 carbon atoms, which comprises reacting a diazoacetoacetic acid ester having the general formula (I): ##STR2## wherein R.sup.1 is the same as defined above, with a trialkylsilyl chloride having the general formula (II): ##STR3## wherein R.sup.2, R.sup.3 and R.sup.4 are the same as defined above, in an inert solvent in the presence of an organic base and an alkali halide having the general formula (III):MX (III)wherein M is an alkaline metal and X is bromine atom or iodine atom. The desired compound is useful as an intermediate for synthesis of carbapenem .beta.-lactam antibiotics.

    摘要翻译: PCT No.PCT / JP90 / 00038 Sec。 371 1990年9月10日第 102(e)1990年9月10日PCT 1990年1月12日PCT PCT。 公开号WO90 / 08149 日本时间1990年7月26日。一种由具有通式(IV)的重氮乙酰乙酸酯制备烯醇甲硅烷基醚化合物的方法:其中R 1为具有1至6个碳原子的低级烷基,苯基 基团,取代的苯基,芳烷基或烯丙基,R 2,R 3和R 4相同或相互不同,各自为具有1至6个碳原子的低级烷基,其包括使具有一般性基团的重氮乙酰乙酸酯 式(I):其中R 1与上述定义相同,具有通式(II)的三烷基甲硅烷基氯:其中R2,R3和R4与上述定义相同 在有机碱和具有通式(III)的碱金属卤化物存在下,在惰性溶剂中反应:其中M是碱金属,X是溴原子或碘原子的MX(III)。 所需化合物可用作合成碳青霉烯β-内酰胺抗生素的中间体。