Liquid-crystalline medium

A liquid-crystalline medium comprising:

• at least one compound of formula I,
• in which
• R1 and
• R1* each, independently of one another, denote an alkyl or alkoxy radical having 1 to 15 C atoms, where, in addition, one or more CH2 groups in these radicals are each optionally replaced, independently of one another, by —C≡C—, —CF2O—, —CH═CH—,
• —O—, —CO—O—, —O—CO— in such a way that O atoms are not linked directly to one another, and in which, in addition, one or more H atoms are each optionally replaced by halogen,
• Z1 and Z2 each, independently of one another, denote a single bond, —CH2CH2—, —CH═CH—, —CH2O—, —OCH2—, —CF2O—, —OCF2—, —COO—, —OCO—, —C2F4—, —C≡C—, —CF═CF—, or —CH═CHCHO—, and
• L1-3 each, independently of one another, denote F, Cl, CF3, OCF3 or CHF2, and
• at least one compound selected from
• in which
• R2A, R2B and R2C each, independently of one another, denote alkenyl radical having 2 to 6 C atoms which is unsubstituted, monosubstituted by CN or CF3 or at least monosubstituted by halogen, where, in addition, one or more CH2 groups in these radicals are each optionally replaced by —O—, —S—,
• —C≡C—, CF2O—, —OCF2—, —OC—O— or —O—CO— in such a way that O atoms are not linked directly to one another,
• L1-4 each, independently of one another, denote F, Cl, CF3 or CHF2,
• Z2 and Z2′ each, independently of one another, denote a single bond, —CH2CH2—, —CH═CH—, —CF2O—, —OCF2—, —CH2O—, —OCH2—, —COO—, —OCO—, —C2F4—, —CF═CF—, or—CH═CHCH2O—,
• (O) denotes a single bond or —O—,
• p denotes 0, 1 or 2,
• q denotes 0 or 1, and
• v denotes 1 to 6.