Process for selectively producing optically active 1-derivatized-2-diol
using lipase CES and triglyceride
    81.
    发明授权
    Process for selectively producing optically active 1-derivatized-2-diol using lipase CES and triglyceride 失效
    使用脂肪酶CES和甘油三酸酯选择性地制备光学活性的1-衍生化的2-二醇的方法

    公开(公告)号:US5391494A

    公开(公告)日:1995-02-21

    申请号:US104408

    申请日:1993-08-10

    摘要: This invention provides optically active compounds which are starting materials of physiologically active substances, functional materials and the like, and the compounds are represented by the general formula (I): ##STR1## wherein R.sup.1 is hydrogen or alkanoyl of 2-20 carbon atoms, R.sup.2 is alkyl of 1-40 carbon atoms, alkenyl of 1-40 carbon atoms, or alkynyl of 1-40 carbon atoms in which the alkyl, alkenyl or alkynyl moiety is possible to have phenyl, cyclohexyl, pyridyl, pyrimidyl, pyridadyl, pyrazyl, dioxyl, bicyclooctyl, or a substituent thereof, or halogen, cyanogen, oxygen, nitrogen, silicon or sulfur, and X is a protective group removable by a chemical method of organic synthesis and C* is an asymmetric carbon.

    摘要翻译: 本发明提供作为生理活性物质,功能材料等的原料的光学活性化合物,该化合物由通式(I)表示:其中R 1为氢或2-20的烷酰基 碳原子,R2是1-40个碳原子的烷基,1-40个碳原子的烯基或1-40个碳原子的炔基,其中烷基,烯基或炔基部分可能具有苯基,环己基,吡啶基,嘧啶基, 吡啶基,吡嗪基,二恶基,双环辛基或其取代基,或卤素,氰,氧,氮,硅或硫,X是通过有机合成的化学方法除去的保护基,C *是不对称碳。

    Liquid crystalline ester compounds and mixtures thereof
    89.
    发明授权
    Liquid crystalline ester compounds and mixtures thereof 失效
    液晶酯化合物及其混合物

    公开(公告)号:US4834907A

    公开(公告)日:1989-05-30

    申请号:US4815

    申请日:1987-01-08

    摘要: Novel chiral smectic liquid crystalline ester compounds having a superior stability and exhibiting a high response rate when used in the form of display elements and chiral smectic mixtures containing at least one of these compounds are provided, which compounds are expressed by the formula ##STR1## wherein n is an integer of 2 to 16; l is 0, 1 or 2; m is 1 or 2 under the condition of l+m.gtoreq.2; X represents methylene group --CH.sub.2 -- or single bond when l is zero, methylene group --CH.sub.2 -- or ether linkage --O-- when l=1 or ether linkage --O-- when l=2; and Y represents R, OR, --COR, --OCOR, --OCOOR or --COOR wherein R throughout represents an alkyl group of 1 to 18 carbon atoms; and asterisk * shows an optically active carbon atom.

    摘要翻译: 提供了具有优异稳定性并以显示元件形式使用并且含有至少一种这些化合物的手性近晶混合物时具有高响应率的新型手性近晶液晶酯化合物,该化合物由下式表示:其中 n为2〜16的整数。 l为0,1或2; 在l + m> / = 2的条件下,m为1或2; 当l = 1时,X表示亚甲基-CH 2 - 或单键,当l = 1时为亚甲基-CH 2 - 或醚键-O-,当l = 2时,表示醚键-O-; 并且Y表示R,OR,-COR,-OCOR,-OCOOR或-COOR,其中R全部表示1至18个碳原子的烷基; 星号*表示光学活性碳原子。