Verfahren zur katalytischen Dehydrierung von Diolen
    72.
    发明公开
    Verfahren zur katalytischen Dehydrierung von Diolen 失效
    Verfahren zur katalytischen Dehydrierung von Diolen。

    公开(公告)号:EP0628552A1

    公开(公告)日:1994-12-14

    申请号:EP94105548.5

    申请日:1994-04-11

    IPC分类号: C07D307/33 C07B41/06

    CPC分类号: C07D315/00

    摘要: Die Erfindung betrifft ein Verfahren zur katalytischen Dehydrierung von Diolen mit 3 bis 10 Kohlenstoffatomen an einem Kupfer und Chrom enthaltenden Katalysator, wobei in einem 2-Stufen-Verfahren die Diole zunächst in der Flüssigphase über den Katalysator geleitet werden und das so erhaltene Reaktionsgemisch anschließend in der Gasphase über den Katalysator geleitet wird.

    摘要翻译: 本发明涉及一种在含有铜和铬的催化剂上催化脱氢具有3至10个碳原子的二醇的方法,该二醇首先在2相工艺中通过液相催化剂,由此得到的反应混合物 然后在气相中通过催化剂。

    Ferroelectric liquid crystal composition and liquid crystal device using the same
    78.
    发明公开
    Ferroelectric liquid crystal composition and liquid crystal device using the same 失效
    FerroelektrischeFlüssigkristallzusammensetzungsowieFlüssigkristallvorrichtungzu deren Verwendung。

    公开(公告)号:EP0495686A2

    公开(公告)日:1992-07-22

    申请号:EP92300479.0

    申请日:1992-01-20

    摘要: A ferroelectric liquid crystal composition including : at least one optically active compound of the formula (I) :
    where R 1 and R 2 are, the same or different, a substituted or unsubstituted straight or branched chain alkyl group having 1 to 15 carbon atoms, k represents an integer of 0 or 1, and * represents an asymmetric carbon atom ; and at least one compound selected from the group consisting of: compounds of the formula (II) :
    where R 3 and R 4 are a straight or branched chain alkyl or alkoxy group having 1-15 carbon atoms,
    each represent
    X represents -O-, -CO- or a single bond, m and n are independently an integer of 0 or 1 ; compounds of the formula (III) :
    where R 5 and R 6 are, the same or different, a straight or branched chain alkyl or alkoxy group having 1-15 carbon atoms, and p is an integer of 0 or 1 ; said ferroelectric liquid crystal composition exhibiting at least nematic phase, smectic A phase and smectic C phase.

    摘要翻译: 一种铁电液晶组合物,其包含:至少一种式(I)的光学活性化合物:其中R 1和R 2相同或不同的取代或未取代的直链或支链烷基 具有1至15个碳原子,k表示0或1的整数,*表示不对称碳原子; 和选自下列的化合物中的至少一种化合物:式(II)化合物:其中R 3和R 4是具有1-15个碳原子的直链或支链烷基或烷氧基的CHEM, 各自表示 X表示-O-,-CO-或单键,m和n独立地为0或1的整数; 式(III)化合物:其中R 5和R 6相同或不同,具有1-15个碳原子的直链或支链烷基或烷氧基,其中p是整数 0或1; 所述铁电液晶组合物至少显示向列相,近晶相A和近晶相C。

    Stereocontrolled production of hydroxyester, hydroxyamide, and lactone compounds from chiral alpha-amino aldehydes
    79.
    发明公开
    Stereocontrolled production of hydroxyester, hydroxyamide, and lactone compounds from chiral alpha-amino aldehydes 失效
    Stereokontrollierte Herstellung von Hydroxyester-,Hydroxyamid- und Lactonverbindungen aus chiralen alpha-Aminoaldehyden。

    公开(公告)号:EP0491538A1

    公开(公告)日:1992-06-24

    申请号:EP91311659.6

    申请日:1991-12-16

    申请人: MERCK & CO. INC.

    CPC分类号: C07C271/22 C07C2602/08

    摘要: A process for stereocontrolled preparation of a medicinally significant hydroxyester, hydroxyamide or lactone compound of structural formula:

    comprises the addition of homoenolate equivalents to chiral α-amino aldehydes. The hydroxyester, hydroxyamide, or lactone reaction products are useful as inhibitors of the HIV protease or of renin, or as intermediates in the preparation of inhibitors of the HIV protease or renin.

    摘要翻译: 用于立体控制制备结构式为:CHEM的医学上重要的羟基酯,羟基酰胺或内酯化合物的方法包括向手性α-氨基醛中加入高烯酸烯醇化物当量。 羟基酯,羟基酰胺或内酯反应产物可用作HIV蛋白酶或肾素的抑制剂,或作为制备HIV蛋白酶或肾素抑制剂的中间体。

    Lactone compound and composition comprising the same
    80.
    发明公开
    Lactone compound and composition comprising the same 失效
    Lakton-Verbindung und diese enthaltende Zusammensetzung。

    公开(公告)号:EP0488682A1

    公开(公告)日:1992-06-03

    申请号:EP91310936.9

    申请日:1991-11-27

    摘要: Lactone compounds, suitable for use in liquid crystal composition, have the formula:
    wherein R¹ is a straight or branched alkyl or alkoxy group of 1 to 15 carbon atoms; R² is a straight or branched alkyl group of 1 to 16 carbon atoms; -A- is a single bond, a 1,4-phenylene group or 1,4-cyclohexylene group; and * indicates an asymmetric carbon atom.

    摘要翻译: 适用于液晶组合物的内酯化合物具有下式:其中R 1是1-15个碳原子的直链或支链烷基或烷氧基; R 2是1至16个碳原子的直链或支链烷基; -A-是单键,1,4-亚苯基或1,4-亚环己基; *表示不对称碳原子。