Patent ID: 7674507

Claim:
Compounds of the general formula I in which B 1 R 1 , R 2 denote H, halogen, CN, SCN, NCS, SF 5 , a linear or branched, optionally chiral alkyl radical having 1 to 15 C atoms which is unsubstituted, monosubstituted by CN or CF 3 or mono- or polysubstituted by halogen and in which one or more CH 2 groups may each be replaced, independently of one another, by —O—, —S—, —CO—, —CO—O—, —O—CO—, —CH═CH—, —CH═CF—, —CF═CF—, —C≡C—, —CH 2 O— or —CF 2 O— in such a way that heteroatoms are not linked directly to one another and asymmetrical groups may be present in both orientations, A 1 , A 2 each, independently of one another, identically or differently, denote a) trans-1,4-cyclohexylene, in which, in addition, one or more non-adjacent CH 2 groups may be replaced by —O— and/or —S—, b) 1,4-phenylene, in which one or two CH groups may be replaced by N and in which one or more H atoms may be replaced by Br, Cl, F, CN, methyl, methoxy or a mono- or polyfluorinated methyl or methoxy group, c) a radical from the group 1,4-bicyclo[2.2.2]octylene, piperidine-1,4-diyl, cyclobutane-1,3-diyl, spiro[3.3]heptane-2,6-diyl, in which hydrogen atoms may be mono- or polysubstituted by F, CN, SCN, SF 5 , CH 2 F, CHF 2 or CF 3 , OCH 2 F, OCHF 2 or OCF 3 , one or more double bonds may be replaced by single bonds, M, M 1 or M 2 denotes —O—, —S—, —CH 2 —, —CHY— or —CYY 1 —, and Y and Y 1 denote Cl, F, CN, OCF 3 or CF 3 , or d) 1,4-cyclohexenylene, Z 1 , Z 2 each, independently of one another, identically or differently, denote a single bond, —CH 2 O—, —CO—O—, —CF 2 O—, —CH 2 CH 2 CF 2 O—, —CF 2 CF 2 —, —CH 2 CF 2 —, —CH 2 CH 2 —, —CH═CH—,—CH═CF—, —CF═CF— or —C≡C—, where asymmetrical bridges may be oriented to both sides, and n, m, independently of one another, denote 0, 1, 2 or 3, with the proviso that if m=0, n=1 and at the same time A 2 denotes a phenylene as in b), then Z 2 , in the stated orientation, denotes —CH 2 O—, —CO—O—, —CF 2 O—, —CH 2 CH 2 CF 2 O—, —CF 2 CF 2 —, —CH 2 CF 2 —, —CF 2 H 2 —, —CH 2 CH 2 —, —CH═CH—, —CH═CF—, —CF═CH— or —CF═CF—.