FIVE MEMBERED-RING COMPOUNDS AND UTILIZATION THEREOF IN LIQUID CRYSTAL MIXTURES

摘要

The invention relates to five-membered ring-compounds of formula (I), R<1>-X-(A<1>-M<1>)a-(A<2>-M<2>)b-A<3>-Y-E (I) wherein E is a five-membered ring containing T-Z-R<2> radical and T is non-directed 4-fluorothiophen-2,5-diyl, 3-fluorothiophen-2,5-diyl, 3-fluorothiophen-2,4-diyl, 5-fluorothiophen-2,4-diyl, furan-2,5-diyl, furan-2,4-diyl, isoxazol-3,5-diyl, thiazol-2,5-diyl, thiazol-2,4-diyl, cyclopentan-1,3-diyl, cyclopenten-1,3-diyl, R<1> and R<2> are hydrogen, X is a simple compound, -O- is, OC(=O)-, -C(=O)O- or -OC(=O)O-, Y is -OC(=O)-, -OCH2-, -CH2CH2-, Z is a simple compound or -O-, A<1>, A<2>, A<3> are separate phenylen-1,4-diyls, M<1>,M<2> are non-directed and independent of each other -OC(=O)-, -OCH2-, -CH2CH2-, -OC(=O)CH2CH2-, -OCH2CH2CH2, -CC-, -CH2CH2CH2CH2- or are a simple compound, a,b are independent of each other and are equal to 0 or 1, and are utilized in liquid crystal mixtures.