会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 24. 发明专利
    • DE69518554D1
    • 2000-10-05
    • DE69518554
    • 1995-01-12
    • CANON KK
    • NAKAMURA SHINICHITAKIGUCHI TAKAOIWAKI TAKASHITOGANO TAKESHIKOSAKA YOKO
    • G02F1/13C07D307/33C07D405/10C07D413/10C07D417/10C09K19/02C09K19/34C09K19/46C09K19/58
    • An optically active compound represented by the following general formula (I): R1-A1-A2-X1-A3-(CH2)p-L-A4-R2 (I> where p is an integer from 2 to 20 where R1 and R2 respectively are H, F, CN or straight chain, branched or cyclic alkyl group (one or more -CH2- in the alkyl group may be replaced by -O-, -S- -CO-, -CH (CN)-, -CH=CH- or -C IDENTICAL C- under condition that hetero atoms do not position adjacent and the hydrogen atom in the alkyl group may be replaced by a fluorine atom) having 1 to 30 carbon atoms, A3 is a group selected from the group consisting of 1, 4-phenylene, pyridine-2,5-diyl, pyrimidine-2,5-diyl, pyrazine-2,5-diyl, pyridazine-3,6-diyl, 1,4-cyclohexylene, 1,3-dioxane-2,5-diyl, 1,3-ditiane-2,5-diyl, thiophene-2,5-diyl, thiazole-2,5-diyl, thiaziazole-2,5-diyl, benzoxazole-2,5-diyl, benzoxazole-2,6-diyl, benzothiazole-2,5-diyl, benzothiazole-2,6-diyl, benzofuran-2,5-diyl, benzofuran-2,6-diyl, quinoxaline-2,6-diyl, quinoline-2,6-diyl, 2,6-naphthylene, indane-2,5-diyl, 2-alkylindane-2,5-diyl (the alkyl group is a straight chain or branched alkyl group having 1 to 18 carbon atoms), indanone-2,6-diyl, 2-alkylindane-2,6-diyl (the alkyl group is a straight chain or branched alkyl group having 1 to 18 carbon atoms), coumarane-2,5-diyl and 2-alkylcoumarane-2,5-diyl (the alkyl group is a straight chain or branched alkyl group having 1 to 18 carbon atoms), each of which may be substituted by at least one substituent selected from the group consisting of F, Cl, Br, CH3, CF3 and CN, A1, A2 and A4 are single bonds or selected from A3, X1' is a single bond, -COO-, -OCO-, -CH2O-, -OCH2-, -CH2CH2-, -CH=CH- or -C IDENTICAL C-, L is optically active: The alkyl group is straight-chain or branched alkyl group having 1 to 5 carbon atoms.