中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

31 records (took 0.026 seconds)

    Synthesis and use of oxa-spirodiphosphine ligand
    16.
    发明授权
    Synthesis and use of oxa-spirodiphosphine ligand 有权

    公开(公告)号：US12071444B2

    公开(公告)日：2024-08-27

    申请号：US17689925

    申请日：2022-03-08

    Applicant: SHENZHEN CATALYS TECHNOLOGY CO., LTD

    Inventor： Xumu Zhang ,  Genqiang Chen ,  Jiaming Huang

    IPC: C07F15/00 ,  B01J31/22 ,  B01J31/24 ,  C07C51/36 ,  C07F9/6561

    CPC classification number: C07F15/0046 ,  B01J31/2213 ,  B01J31/249 ,  C07C51/36 ,  C07F9/6561 ,  B01J2231/645 ,  B01J2531/821 ,  C07B2200/07

    Abstract: The present invention relates to the technical field of chiral synthesis, and specifically provides the synthesis and use of a new type of oxa-spirodiphosphine ligands. The bisphosphine ligand is prepared with oxa-spirobisphenol as a starting material after triflation, palladium catalyzed coupling with diaryl phosphine oxide, reduction of trichlorosilane, further palladium catalyzed coupling with diaryl phosphine oxide, and further reduction of trichlorosilane. The oxa-spiro compound has central chirality, and thus includes L-oxa-spirodiphosphine ligand and R-oxa-spirodiphosphine ligand. The racemic spirodiphosphine ligand is capable of being synthesized from racemic oxa-spirobisphenol as a raw material. The present invention can be used as a chiral ligand in the asymmetric hydrogenation of unsaturated carboxylic acids. The complex of the ligand with ruthenium can achieve an enantioselectivity of greater than 99% in the asymmetric hydrogenation of methyl-cinnamic acid.

    Phosphine-based catalysts useful for the telomerization of butadiene
    20.
    发明授权
    Phosphine-based catalysts useful for the telomerization of butadiene 失效
    用于丁二烯调聚的膦基催化剂

    公开(公告)号：US08779164B2

    公开(公告)日：2014-07-15

    申请号：US13518040

    申请日：2010-02-17

    Applicant: Petrus Van Leeuwen ,  Mathieu Tschan ,  Zoraida Freixa ,  Henk Hagen

    Inventor： Petrus Van Leeuwen ,  Mathieu Tschan ,  Zoraida Freixa ,  Henk Hagen

    IPC: C07F19/00 ,  C07C1/22

    CPC classification number: C07F19/005 ,  B01J31/2452 ,  B01J31/249 ,  B01J2231/20 ,  B01J2531/824 ,  C07C1/20 ,  C07C1/22 ,  C07C41/06 ,  C07C41/20 ,  C07C11/02 ,  C07C43/15 ,  C07C43/04

    Abstract: A phosphine-based catalyst composition suitable for the telomerization of butadiene to produce 1-octene includes palladium and one of a class of novel phosphine ligands characterized by two potentially functionalized phenyl rings and cyclized 5- or 6-member alkoxy groups that, together, bridge the two potentially functionalized phenyl rings. In these groups the alkoxy moiety of each is located ortho to at least one functionalizing moiety, if any, on the phenyl rings. The catalysts including this class of phosphine ligands may exhibit higher catalytic activity and selectivity, and may be used at lower temperatures, than many other phosphine ligand catalysts, reducing costs. Palladium precipitation may also be reduced.

    Abstract translation: 适用于丁二烯调聚以生产1-辛烯的磷化氢基催化剂组合物包括钯和一类新型膦配体之一，其特征在于两个潜在官能化的苯环和环化的5-或6-烷氧基，其一起桥接 两个潜在的官能化苯环。 在这些基团中，每个烷氧基部分位于苯环上至少一个官能化部分（如果有的话）的邻位。 包括这类膦配体的催化剂可以表现出更高的催化活性和选择性，并且可以在比许多其它膦配体催化剂更低的温度下使用，降低成本。 钯沉淀也可能降低。

Patent Agency Ranking