Compounds for a liquid crystal medium and high-frequency components containing said liquid crystal medium

Compounds of the formula I

• in which
• L1 to L3, independently of one another, denote F, Cl, C1- to C10-alkyl or a meaning in accordance with Rx, where one or more of the radicals L1 to L3 denote an Rx,
• n, o, p, independently of one another, denote 0, 1, 2, 3 or 4,
• Rx denotes cyclopropyl, cyclobutyl, cyclopentyl or cyclohexyl,
• R1 and R2, independently of one another, denote H, a halogenated or unsubstituted alkyl radical having 1 to 15 C atoms, where, in addition, one or more CH2 groups in these radicals may each be replaced, independently of one another, by —C≡C—, —CH═CH—, —CF═CF—, —(CO)O—, —O(CO)—, —(CO)— or —O— in such a way that O atoms are not linked directly to one another, F, Cl, Br, CN, CF3, OCF3, SCN, NCS or SF5,
• A1 denotes
• a) trans-1,4-cyclohexylene or cyclohexenylene, in which, in addition, one or two non-adjacent CH2 groups may be replaced by —O— and/or —S— and in which H may be replaced by F,
• b) 1,4-phenylene, in which one or two CH groups may be replaced by N and in which, in addition, one or more H atoms may be replaced by Br, Cl, F, CN, Rx, C1-C10 alkyl, C1-C10 alkoxy or a mono-or polyfluorinated C1-C10 alkyl or alkoxy group,
• or
• c) a radical from the group 1,4-bicyclo[2.2.2]octylene, cyclobut-1,3-diyl, spiro[3.3]heptane-2,6-diyl, thiophene-2,5-diyl,
• in which one or more CH groups may be replaced by N, one or more H atoms may be replaced by Br, Cl, F, CN, Rx, C1-C10 alkyl, C1-C10 alkoxy or a mono- or polyfluorinated C1-C10 alkyl or alkoxy group,
• and one or more double bonds may be replaced by single bonds,
• Z1 denotes a single bond, —C≡C—, —CH═CH—, —CH2O—, —(CO)O—, —CF2O—, —CF2CF2—, —CH2CF2—, —CH2CH2—, —(CH2)4—, —CH═CF— or —CF═CF—, where asymmetrical bridges may be oriented to both sides, and
• m denotes 0, 1 or 2.