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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
    6.
    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。

    Catalytic preparation of condensation products of formaldehyde
    7.
    发明授权
    Catalytic preparation of condensation products of formaldehyde 失效
    催化制备甲醛缩合产物

    公开(公告)号：US5585496A

    公开(公告)日：1996-12-17

    申请号：US570557

    申请日：1995-12-11

    申请人： Joaquim H. Teles ,  Johann-Peter Melder ,  Eugen Gehrer ,  Wolfgang Harder ,  Klaus Ebel ,  Carsten Groening ,  Regina Meyer

    发明人： Joaquim H. Teles ,  Johann-Peter Melder ,  Eugen Gehrer ,  Wolfgang Harder ,  Klaus Ebel ,  Carsten Groening ,  Regina Meyer

    IPC分类号： B01J31/02 ,  C07B61/00 ,  C07C45/75 ,  C07C47/19 ,  C07C49/17 ,  C07D249/08 ,  C07D249/10 ,  C07D249/12 ,  C07D249/14 ,  C07D471/06

    CPC分类号： C07C45/75

    摘要： A process for the catalytical preparation of condensation products of formaldehyde, in which formaldehyde or a formaldehyde-forming compound is caused to undergo reaction using a catalyst which has been produced, in the presence of an auxiliary base, from a triazolium salt of formula I ##STR1## in which R.sup.1 and R.sup.3 are the same or different and stand for aliphatic groups having from 1 to 30 carbon atoms, optionally substituted aryl groups, optionally substituted aralkyl groups, and/or optionally substituted heteroaryl groups,R.sup.2 represents hydrogen, the hydroxymethylene group --CH.sub.2 OH or the hydroxy-hydroxymethylene-methylidyne group --CH(OH)(CH.sub.2 OH), andR.sup.4 denotes hydrogen, a halogen atom, a nitro or cyano group, an aliphatic group having from 1 to 30 carbon atoms, an optionally substituted aryl group, an optionally substituted aralkyl group, an optionally substituted heteroaryl group, an alkoxy group --OR.sup.5, a thioether group --SR.sup.6, an amino group --NR.sup.7 R.sup.8, an acyl group--COR.sup.9 or an ester group --COOR.sup.10, where R.sup.5, R.sup.6, R.sup.7, R.sup.8, and R.sup.9 stand for radicals such as those stated above for R.sup.1, and R.sup.10 is a C.sub.1 -C.sub.10 alkyl group or an optionally substituted aryl or aralkyl group, orR.sup.3 and R.sup.4 together form a C.sub.3 -C.sub.5 alkylene or C.sub.3 -C.sub.5 alkenylene group or a C.sub.6 -C.sub.14 alkylene group, or a C.sub.7 -C.sub.14 aralkylene or C.sub.8 -C.sub.14 aralkenylene bridging member, andA is the equivalent of an anion having one or more negative charges for electrical neutralization of the charge on the triazolium cation.

    摘要翻译： 催化制备甲醛缩合产物的方法，其中使甲醛或形成甲醛的化合物在辅助碱存在下由式I的三唑鎓盐生产的催化剂进行反应， （I）其中R1和R3相同或不同，代表具有1至30个碳原子的脂族基团，任选取代的芳基，任选取代的芳烷基和/或任选取代的杂芳基，R 2表示氢， 羟基亚甲基-CH 2 OH或羟基 - 羟基亚甲基 - 亚甲基基团-CH（OH）（CH 2 OH），R 4表示氢，卤素原子，硝基或氰基，具有1至30个碳原子的脂族基团， 取代的芳基，任选取代的芳烷基，任选取代的杂芳基，烷氧基-OR 5，硫醚基-SR 6，氨基-NR 7 R 8，酰基-C COR 9或酯gr 其中R 5，R 6，R 7，R 8和R 9分别代表上述R 1的基团，R 10是C 1 -C 10烷基或任意取代的芳基或芳烷基，或者R 3和R 4一起形成 C3-C5亚烷基或C3-C5亚烯基或C6-C14亚烷基，或C7-C14亚芳基或C8-C14芳亚烷基桥连元件，A相当于具有一个或多个负电荷用于电中和的阴离子 的三唑鎓阳离子的电荷。