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    Oxotitanium complex, asymmetric hydrogenation catalyst comprising the complex, and process for producing .beta.-hydroxy ketone or .alpha.-hydroxy carboxylic acid ester using the complex
    17.
    发明授权
    Oxotitanium complex, asymmetric hydrogenation catalyst comprising the complex, and process for producing .beta.-hydroxy ketone or .alpha.-hydroxy carboxylic acid ester using the complex 失效
    包含络合物的氧钛复合物，不对称氢化催化剂以及使用络合物生产β-羟基酮或α-羟基羧酸酯的方法

    公开(公告)号：US5714624A

    公开(公告)日：1998-02-03

    申请号：US775205

    申请日：1996-12-30

    申请人： Takeshi Nakai ,  Dai Kitamoto ,  Noboru Sayo

    发明人： Takeshi Nakai ,  Dai Kitamoto ,  Noboru Sayo

    IPC分类号： B01J31/22 ,  C07B61/00 ,  C07C45/51 ,  C07C45/54 ,  C07C45/72 ,  C07C49/17 ,  C07C67/31 ,  C07C67/343 ,  C07C67/347 ,  C07C69/732 ,  C07F7/00 ,  C07F7/28

    CPC分类号： B01J31/223 ,  B01J31/2226 ,  C07C45/511 ,  C07C45/72 ,  C07C67/343 ,  C07C67/347 ,  C07F7/006 ,  B01J2231/341 ,  B01J2531/0266 ,  B01J2531/46 ,  B01J2540/34

    摘要： A novel oxotitanium complex represented by general formula (I) is disclosed: ##STR1## wherein R.sup.1 and R.sup.2 may be the same or different and each represents a hydrogen atom, a lower alkyl group, a lower alkoxy group, a halogen atom, a phenyl group, a substituted phenyl group, a trialkylsilyl group, a monoalkyldiphenylsilyl group, a dialkylmonophenylsilyl group, a triphenylsilyl group, a substituted triphenylsilyl group, or a lower alkoxycarbonyl group, provided that R.sup.1 and R.sup.2 may be bonded to each other to form a hydrocarbon ring or a substituted hydrocarbon ring in cooperation with the carbon atoms to which R.sup.1 and R.sup.2 are bonded; R.sup.3 and R.sup.4 may be the same or different and each represents a hydrogen atom, a lower alkyl group, a lower alkoxy group, a benzoyl group, a benzenesulfonyl group, or a halogen atom, provided that R.sup.3 and R.sup.4 may be bonded to each other to form a hydrocarbon ring or a substituted hydrocarbon ring in cooperation with the carbon atoms to which R.sup.3 and R.sup.4 are bonded; and n is 1 or 2. The novel oxotitanium complex is useful as an asymmetric reaction catalyst. A process for producing a .beta.-hydroxy ketone or an .alpha.-hydroxy carboxylic acid ester in the presence of the novel oxotitanium complex is also disclosed.

    摘要翻译： 公开了由通式（I）表示的新型氧代钛络合物：其中R 1和R 2可以相同或不同，各自表示氢原子，低级烷基，低级烷氧基，卤素原子 苯基，取代苯基，三烷基甲硅烷基，单烷基二苯基甲硅烷基，二烷基单苯基甲硅烷基，三苯基甲硅烷基，取代的三苯基甲硅烷基或低级烷氧基羰基，条件是R 1和R 2可以彼此键合形成 与R1和R2键合的碳原子配合的烃环或取代的烃环; R 3和R 4可以相同或不同，并且各自表示氢原子，低级烷基，低级烷氧基，苯甲酰基，苯磺酰基或卤素原子，条件是R 3和R 4可以彼此键合 与R3和R4键合的碳原子一起形成烃环或取代的烃环; 并且n为1或2.新型氧钛复合物可用作不对称反应催化剂。 还公开了在新型氧代钛络合物存在下生产β-羟基酮或α-羟基羧酸酯的方法。

    Intermediates for the preparation of vitamin A and carotenoids and process for their preparation
    19.
    发明授权
    Intermediates for the preparation of vitamin A and carotenoids and process for their preparation 失效
    用于制备维生素A和类胡萝卜素的中间体及其制备方法

    公开(公告)号：US5563297A

    公开(公告)日：1996-10-08

    申请号：US320150

    申请日：1994-10-07

    申请人： Hugues Bienayme

    发明人： Hugues Bienayme

    IPC分类号： B01J31/24 ,  C07B61/00 ,  C07C45/54 ,  C07C45/65 ,  C07C45/67 ,  C07C47/20 ,  C07C47/21 ,  C07C47/228 ,  C07C47/232 ,  C07C49/203 ,  C07C49/213 ,  C07C49/217 ,  C07C49/683 ,  C07C49/796 ,  C07C69/96 ,  C07C403/00 ,  C07C403/14

    CPC分类号： C07C403/14 ,  C07C403/02 ,  C07C403/12 ,  C07C45/54 ,  C07C45/67 ,  C07C47/20 ,  C07C47/21 ,  C07C47/232 ,  C07C49/217 ,  C07C49/683 ,  C07C49/796 ,  C07C69/96 ,  C07B2200/09 ,  C07C2101/16

    摘要： The present invention relates to novel intermediates for the preparation of vitamin A and carotenoids, corresponding to the following formula (I): ##STR1## in which X is a carbon atom; n is equal to 1 or 2; R.sub.1, R.sub.2 and R.sub.3, which may be identical or different, each independently represent hydrogen, alkyl containing 1 to 4 carbon atoms, alkenyl containing 2 to 11 carbon atoms or aryl, each alkyl and alkenyl may be linear, branched or cyclic, or R.sub.1 and R.sub.2 can together with the carbon atom to which they are attached form a cycloaliphatic compound which is optionally substituted; and R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8, which may be identical or different, each independently represent hydrogen, alkyl containing 1 to 4 carbon atoms or alkenyl containing 2 to 10 carbon atoms, each alkyl or alkenyl being linear, or if containing sufficient numbers of carbon atoms, may also be branched or cyclic, or an aryl containing 6 to 10 carbon atoms, or any two of R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 may together form, along with the carbon atom(s) to which they are attached, a cycloalkylidene group containing 3 to 10 carbon atoms, as well as the process for their preparation and their use.

    摘要翻译： 本发明涉及用于制备维生素A和类胡萝卜素的新型中间体，其对应于下式（I）：其中X为碳原子的式（I） n等于1或2; R 1，R 2和R 3可以相同或不同，各自独立地表示氢，含有1至4个碳原子的烷基，含有2至11个碳原子的烯基或芳基，每个烷基和烯基可以是直链，支链或环状的，或者R1 并且R 2可以与它们所连接的碳原子一起形成任选被取代的脂环族化合物; 和可以相同或不同的R 4，R 5，R 6，R 7和R 8各自独立地表示氢，含有1至4个碳原子的烷基或含2至10个碳原子的链烯基，每个烷基或烯基是直链的，或者如果含有足够的 碳原子数也可以是支链或环状的，或含有6至10个碳原子的芳基，或者R 4，R 5，R 6，R 7和R 8中的任何两个可以一起与它们的碳原子一起形成， ，含有3至10个碳原子的亚环烷基，以及其制备方法及其用途。