Process for hydrogenation of cyanopropionaldehyde-containing
cyanopropionadelhyde acetals
    3.
    发明授权
    Process for hydrogenation of cyanopropionaldehyde-containing cyanopropionadelhyde acetals 失效
    含氰基丙醛的氰基丙醛缩醛的氢化方法

    公开(公告)号:US5886227A

    公开(公告)日:1999-03-23

    申请号:US958894

    申请日:1997-10-28

    CPC分类号: C07C213/02

    摘要: Disclosed is an improved process for the catalytic hydrogenation of cyanopropionaldehyde alkyl acetals (CPAA) to form the aminobutyraldehyde alkyl acetals. The basic process comprises hydrogenating the cyanopropionaldehyde alkyl acetals by contacting said cyanopropionaldehyde alkyl acetals with hydrogen in the presence of a nickel or cobalt catalyst under conditions for reducing the nitrile group to the primary amine. The improvement resides in effecting the hydrogenation of a cyanopropionitrile dialkyl acetal feedstock containing contaminating levels of cyanopropionaldehyde in the presence of a secondary alkanol or water.

    摘要翻译: 公开了用于氰基丙醛烷基缩醛(CPAA)的催化氢化以形成氨基丁醛烷基缩醛的改进方法。 基本方法包括通过在镍或钴催化剂存在下使所述氰基丙醛烷基缩醛与氢接触,在将腈基还原成伯胺的条件下使氰基丙醛烷基缩醛氢化。 改进在于在仲烷醇或水的存在下实现含有污染水平的氰基丙醛的氰基丙腈二烷基缩醛原料的氢化。

    Racemization of optically active alkoxyamines
    4.
    发明授权
    Racemization of optically active alkoxyamines 失效
    光学活性烷氧基胺的外消旋化

    公开(公告)号:US06060624A

    公开(公告)日:2000-05-09

    申请号:US327656

    申请日:1999-06-08

    CPC分类号: C07C213/08 C07B2200/07

    摘要: A method for racemizing an enantiomer of an alkoxyamine represented by formula I ##STR1## in which R.sub.1 and R.sub.2 are the same or different C.sub.1 to C.sub.20 alkyl group. A feed containing an enantiomer of the alkoxyamine is passed over a nickel or cobalt catalyst in the presence of hydrogen and ammonia. The racemic mixture formed by this method contains substantially no by-products.

    摘要翻译: 由式I表示的烷氧基胺的对映异构体外消旋化的方法,其中R 1和R 2是相同或不同的C 1至C 20烷基。 含有烷氧基胺的对映体的进料在氢和氨的存在下通过镍或钴催化剂。 通过该方法形成的外消旋混合物基本上不含副产物。

    Synthesis of vicinal difluoro aromatics and intermediates thereof
    5.
    发明授权
    Synthesis of vicinal difluoro aromatics and intermediates thereof 有权
    邻二氟芳族化合物的合成及其中间体

    公开(公告)号:US06455744B1

    公开(公告)日:2002-09-24

    申请号:US09985786

    申请日:2001-11-06

    IPC分类号: C07C2522

    摘要: A method of preparing vicinal difluoro aromatic compounds in high yield from hydroxy aromatic compounds and a method of preparing intermediates thereof. The hydroxy aromatic compound can be a mono-, bi- or tricyclic aromatic in which the rings are separate or fused. One or more of the rings can contain heteroatoms, such as oxygen, nitrogen, or sulfur, and can contain one or more substitutions, in addition to the hydroxy substitution.

    摘要翻译: 由羟基芳香族化合物高产率制备邻位二氟芳族化合物的方法及其制备中间体的方法。 羟基芳族化合物可以是单环,双环或三环芳族,其中环是分开的或稠合的。 除了羟基取代之外,一个或多个环可以含有杂原子,例如氧,氮或硫,并且可以包含一个或多个取代。

    Process for producing 1,1-difluorovinyl cycloaliphatic compounds
    6.
    发明授权
    Process for producing 1,1-difluorovinyl cycloaliphatic compounds 有权
    制备1,1-二氟乙烯基脂环族化合物的方法

    公开(公告)号:US07030283B2

    公开(公告)日:2006-04-18

    申请号:US10763366

    申请日:2004-01-23

    IPC分类号: C07C17/25 C07C17/23

    CPC分类号: C07C17/25 C07C22/00

    摘要: This invention relates to a process for the preparation of 1,1-difluoroolefins, e.g., difluorovinyl cycloaliphatic compounds such as difluorovinylcyclohexane and derivatives by the dehydrofluorination of a trifluoromethyl-substituted cycloaliphatic compound and the resulting compositions. This method utilizes a “sterically hindered super-base” system represented by the formula M+−NRR−; where M is Na or K and R is a secondary, or tertiary alkyl or cycloalkyl group of amines for effecting dehydrofluorination of the trifluoromethyl group leading to the difluorovinyl based cycloaliphatic compounds. The sterically hindered super base can be formed by the, in situ, reaction of a sodium or potassium alkoxide, e.g., KtBuO with a lithium dialkylamide where the lithium is bonded to nitrogen atom of an amine bearing secondary or tertiary aliphatic groups.

    摘要翻译: 本发明涉及一种制备1,1-二氟烯烃的方法,例如二氟乙烯基脂环族化合物如二氟乙烯基环己烷和通过三氟甲基取代的脂环族化合物的脱氟化氢的衍生物和所得组合物。 该方法利用由式M + - NRR - SUP表示的“空间位阻超基”系统。 其中M是Na或K,R是仲烷基或烷基或环烷基的胺,用于实现导致二氟乙烯基的脂环族化合物的三氟甲基的脱氟化氢。 空间位阻的超级碱可以通过钾或钾醇钾例如KtBuO与二烷基氨基锂的原位反应形成,其中锂与带有仲或叔脂族基团的胺的氮原子键合。

    Synthesis of vicinal difluoro aromatics and intermediates thereof
    9.
    发明授权
    Synthesis of vicinal difluoro aromatics and intermediates thereof 有权
    邻二氟芳族化合物的合成及其中间体

    公开(公告)号:US06894200B2

    公开(公告)日:2005-05-17

    申请号:US10357897

    申请日:2003-02-03

    摘要: A method of preparing vicinal difluoro aromatic compounds in high yield from hydroxy aromatic compounds using various bases and a method of preparing intermediates thereof. A method for making a vicinal difluoro halogenated aromatic compound including providing a tetrafluoro derivative of a halogen substituted aromatic compound, wherein the tetrafluoro derivative has two fluorine atoms on each of two adjacent carbons and at least one additional halogen substituent; reacting the tetrafluoro derivative with a reducing agent in presence of a base for a reaction time sufficient to form the vicinal difluoro halogenated aromatic compound containing two vicinal fluorine substituents and the at least one additional halogen substituent, wherein the reducing agent is used in a reducing agent effective amount sufficient to retain the at least one additional halogen substituent.

    摘要翻译: 使用各种碱由羟基芳族化合物高收率制备邻位二氟芳族化合物的方法及其制备中间体的方法。 一种制备邻二氟卤代芳族化合物的方法,包括提供卤素取代的芳族化合物的四氟衍生物,其中四氟衍生物在两个相邻碳原子上具有两个氟原子和至少一个另外的卤素取代基; 使四氟衍生物与还原剂在碱的存在下反应足以形成含有两个邻位氟取代基的连位二氟卤代芳族化合物和至少一个另外的卤素取代基的反应时​​间,其中还原剂用于还原剂 足以保留至少一个另外的卤素取代基的有效量。

    Synthesis of vicinal difluoro aromatics and intermediates thereof
    10.
    发明授权
    Synthesis of vicinal difluoro aromatics and intermediates thereof 有权
    邻二氟芳族化合物的合成及其中间体

    公开(公告)号:US06706933B2

    公开(公告)日:2004-03-16

    申请号:US10334183

    申请日:2002-12-30

    IPC分类号: C07C2522

    摘要: A method of preparing vicinal difluoro aromatic compounds in high yield from hydroxy aromatic compounds and a method of preparing intermediates thereof. The hydroxy aromatic compound can be a mono-, bi- or tricyclic aromatic in which the rings are separate or fused. One or more of the rings can contain heteroatoms, such as oxygen, nitrogen, or sulfur, and can contain one or more substitutions, in addition to the hydroxy substitution.

    摘要翻译: 由羟基芳香族化合物高产率制备邻位二氟芳族化合物的方法及其制备中间体的方法。 羟基芳族化合物可以是单环,双环或三环芳族,其中环是分开的或稠合的。 除了羟基取代之外,一个或多个环可以含有杂原子,例如氧,氮或硫,并且可以包含一个或多个取代。