Trisubstituted piperazin-2,5-diones
    5.
    发明授权
    Trisubstituted piperazin-2,5-diones 失效
    三取代哌嗪-2,5-二酮

    公开(公告)号:US5214145A

    公开(公告)日:1993-05-25

    申请号:US647618

    申请日:1991-01-28

    IPC分类号: C07D241/08

    CPC分类号: C07D241/08

    摘要: Disclosed is a process for preparation of an amino acid, such as phenylalanine, with a high degree of optical purity. The process makes use of the same amino acid as a chiral template.

    摘要翻译: 公开了具有高光学纯度的氨基酸如苯丙氨酸的制备方法。 该方法利用与手性模板相同的氨基酸。

    Process for preparation of amino acids
    6.
    发明授权
    Process for preparation of amino acids 失效
    氨基酸制备方法

    公开(公告)号:US4992552A

    公开(公告)日:1991-02-12

    申请号:US406995

    申请日:1989-09-14

    IPC分类号: C07D241/08

    CPC分类号: C07D241/08

    摘要: Disclosed is a process for preparation of an amino acid, such as phenylalanine, with a high degree of optical purity. The process makes use of the same amino acid as a chiral template.

    摘要翻译: 公开了具有高光学纯度的氨基酸如苯丙氨酸的制备方法。 该方法利用与手性模板相同的氨基酸。

    Thermosetting coating compositions
    7.
    发明授权
    Thermosetting coating compositions 失效
    热固性涂料组合物

    公开(公告)号:US5466863A

    公开(公告)日:1995-11-14

    申请号:US384094

    申请日:1995-02-06

    IPC分类号: C07C69/716 C07C59/305

    CPC分类号: C07C69/716

    摘要: Provided are 3-oxoadipate esters of certain polyols which are useful as crosslinkers in thermosetting coating compositions. Also provided are such thermosetting compositions comprised of a curable hydroxyl-functional polymer such as a polyester or acrylic and the crosslinkers of the present invention. Such compositions offer a significant improvement in curing temperature.

    摘要翻译: 提供可用作热固性涂料组合物中的交联剂的某些多元醇的3-氧代己二酸酯。 还提供了由可固化的羟基官能聚合物如聚酯或丙烯酸和本发明的交联剂组成的热固性组合物。 这样的组合物提供了固化温度的显着改进。

    Conversion of non-alpha-tocopherols to alpha-tocopherols
    8.
    发明授权
    Conversion of non-alpha-tocopherols to alpha-tocopherols 失效
    非α-生育酚转化成α-生育酚

    公开(公告)号:US4239691A

    公开(公告)日:1980-12-16

    申请号:US45555

    申请日:1979-06-04

    IPC分类号: C07D311/72

    CPC分类号: C07D311/72

    摘要: A process for producing alpha-tocopherol from non-alpha-tocopherols comprising reacting the tocopherol with formaldehyde, carrying out the reaction at a temperature of at least about 175.degree. C. in the presence of a catalytic amount of an acidic ion exchange resin and subjecting the reaction mixture to catalytic hydrogenation.

    摘要翻译: 一种从非α-生育酚生产α-生育酚的方法,包括使生育酚与甲醛反应,在催化量的酸性离子交换树脂存在下,在至少约175℃的温度下进行反应, 反应混合物进行催化氢化。

    Process for dehydrogenation of sterols to produce delta 4-3-ketosteroids
    9.
    发明授权
    Process for dehydrogenation of sterols to produce delta 4-3-ketosteroids 失效
    甾醇脱氢以产生δ4-3-酮类固醇的方法

    公开(公告)号:US4235791A

    公开(公告)日:1980-11-25

    申请号:US81956

    申请日:1979-10-04

    申请人: Charles H. Foster

    发明人: Charles H. Foster

    IPC分类号: C07J9/00

    CPC分类号: C07J9/00

    摘要: This invention relates to the dehydrogenation of a 3-.beta.-hydroxy steroid or a mixture of soy sterols to form the corresponding mixture of .DELTA..sup.4 -3-keto derivatives of phytosterols, the improvement which comprises dehydrogenating the steroid or mixture of sterols using an activated non-pyrophoric nickel catalyst and carrying out the oxidation in the presence of a diaryl ketone. One such process uses a non-pyrophoric Raney nickel type catalyst and a diaryl ketone, such as benzophenone as a hydrogen acceptor.

    摘要翻译: 本发明涉及3β-羟基类固醇或大豆固醇的混合物的脱氢,以形成植物甾醇的DELTA 4-3-酮衍生物的相应混合物,其改进包括使用活化的 非自燃镍催化剂,并在二芳基酮存在下进行氧化。 一种这样的方法使用非自燃性阮内镍型催化剂和二芳基酮,例如二苯甲酮作为氢受体。