PREPARATION OF DIMETHYL CYCLOHEXANEDICARBOXYLATES
    2.
    发明申请
    PREPARATION OF DIMETHYL CYCLOHEXANEDICARBOXYLATES 审中-公开
    二甲基环己烷二羧酸酯的制备

    公开(公告)号:WO1994029259A1

    公开(公告)日:1994-12-22

    申请号:PCT/US1994006265

    申请日:1994-06-03

    CPC classification number: C07C67/303 C07C2601/14 C07C69/75

    Abstract: Disclosed is a process for the preparation of a dimethyl cyclohexanedicarboxylate by the hydrogenation of the analogous dimethyl benzenedicarboxylate ester in the presence of a class of palladium on alumina catalysts which have a unique combination of characteristics. The use of the catalysts permits the process to be carried out at significantly lower process pressures.

    Abstract translation: 公开了一种通过类似的二苯基二羧酸酯在一类具有独特特征组合的氧化铝催化剂存在下氢化制备二甲基环己烷二羧酸酯的方法。 催化剂的使用允许以显着更低的工艺压力进行该方法。

    PREPARATION OF 'alpha'-TOCOPHEROL
    3.
    发明申请
    PREPARATION OF 'alpha'-TOCOPHEROL 审中-公开
    阿托伐他汀的制备

    公开(公告)号:WO1997007113A1

    公开(公告)日:1997-02-27

    申请号:PCT/US1996013343

    申请日:1996-08-14

    CPC classification number: C07D311/72 Y02P20/582

    Abstract: Disclosed is an improved process for the preparation of alpha-tocopherol by the hydroxymethylation followed by the hydrogenation of non- alpha -tocopherols comprising beta -, gamma -, and delta -tocopherols using a particular palladium on alumina catalyst wherein (1) the dispersion and depth of deposition of the palladium metal are within certain ranges, and (2) the alumina is of a particular crystalline phase.

    Abstract translation: 公开了一种通过羟甲基化制备α-生育酚的改进方法,随后使用特定的氧化铝催化剂氢化包含β - ,γ - 和δ-生育酚的非α-生育酚,其中(1)分散体和 钯金属的沉积深度在一定范围内,(2)氧化铝具有特定的结晶相。

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