Compounds having side chains with multiple methyl branches and their use in liquid-crystal mixtures

摘要

Compounds of the formula (I) having side chains with multiple methyl branches R1(-A1-M1)a(-A2-M2)b(-A3-M3)c(-A4)-G(-C*H(CH3)-CH2)n-R2 (I) where * is a chiral carbon atom; A1, A2, A3, A4 are, for example, 1,4-phenylene, pyrimidine-2,5-diyl or 1,3,4-thiadiazole-2,5-diyl; M1, M2, M3, M4 are, for example, -CO-O- or -O-CO-; G is, for example, -CO-O-CH2, -O-CH2- or -O-; R2 is, for example, methyl or ethyl; a, b and c are 0 or 1 and a+b+c is 1, 2 or 3; and n is preferably 3 or 4, are suitable as components, in particular dopes, for liquid-crystalline mixtures and methods of using these compounds in liquid-crystal mixtures.