Patent ID: 7955664

Claim:
A compound of formula I R 1 -(A 1 -Z 1 ) a —W 1 —(Z 2 -A 2 ) b -Z 3 —W 2 —(Z 4 -A 3 ) c -R 2 I wherein W 1 , W 2 , are each, independently of one another, a divalent group of the formula ring B is an unsaturated or partially saturated, six-membered ring in which one or two of the CH 2 groups are each replaced by O, where no two O atoms are adjacent, and in which —CH 2 — is optionally replaced by —CHF— or —CF 2 —, or ═CH— is optionally replaced by ═CF—, L 1 , L 2 and L 3 are each, independently of one another, H, Cl, F, CN or CF 3 , R 1 , R 2 , are each, independently of one another, Cl, F, CN, SCN, SF 5 , an alkyl radical having up to 15 C atoms which is unsubstituted, monosubstituted by CN, or at least monosubstituted by halogen, where, in addition, one or more CH 2 groups in these radicals are each optionally replaced, independently of one another, by —O—, —CH═CH—, —CF═CF—, —CF═CH—, —C≡C—, —S—, —CO—, —(CO)O—, —O(CO)— or —O(CO)O— in such a way that O atoms are not linked directly to one another, A 1 , A 2 and A 3 are each, independently of one another, (a) a trans-1,4-cyclohexylene radical, in which, in addition, one or more non-adjacent CH 2 groups are each optionally replaced by —O— or —S—, (b) a 1,4-phenylene radical, in which, in addition, one or two CH groups are each optionally replaced by N, (c) 1,4-cyclohexenylene, (d) 1,3-bicyclo[1.1.1]pentylene, 1,4-bicyclo[2.2.2]octylene, cyclobut-1,3-diyl, spiro[3.3]heptane-2,6-diyl, naphthalene-2,6-diyl, or tetrahydronaphthalene-2,6-diyl, where the radicals (a) to (d) are each optionally substituted by one or more fluorine atoms, Z 1 , Z 2 , Z 3 and Z 4 are each, independently of one another, —(CO)O—, —O(CO)—, —CH 2 O—, —OCH 2 —, —CH 2 CH 2 —, —CH═CH—, —CH═CF—, —CF═CH—, —CF═CF—, —CHFCHF—, —CH 2 CHF—, —CHFCH 2 —, —C≡C—, —(CH 2 ) 4 —, —CF 2 O—, —OCF 2 —, —C 2 F 4 —, —CH═CH—CH 2 CH 2 —, —CH 2 CH 2 OCF 2 — or a single bond, and a, b, and c, are each, independently of one another, 0 or 1, where the sum a+b+c is 1 or 2.