Patent ID: 7691456

Claim:
A dioxane compound according to formula I; R 1 -(A 1 -Z 1 ) m -G-(Z 2 -A 2 ) n -R 2 I in which G is R 1 and R 2 are each, independently of one another, identically or differently, H, halogen, —CN, —SCN, —NCS, —SF 5 , —SCF 3 , —CF 3 , —CF═CF 2 , —CF 2 CF 2 CF 3 , —OCF 3 , —OCHF 2 , —CF 2 CH 2 CF 3 , —OCH 2 CF 2 CHFCF 3 or a linear or branched, optionally chiral alkyl or alkoxy radical having 1 to 15 C atoms which is unsubstituted, mono- or polysubstituted by halogen and in which one or more CH 2 groups are each optionally replaced, independently of one another, by —O—, —S—, —CO—, —CO—O—, —O—CO—, —O—CO—O—, —CH═CH—, —CH═CF—, —CF═CF—, —C≡C— or in such a way that heteroatoms are not linked directly to one another; A 1 and A 2 are each, independently of one another, identically or differently, a) trans-1,4-cyclohexylene, in which, in addition, one or more non-adjacent CH 2 groups are each optionally replaced by —O— or —S— and in which, in addition, one or more H atoms are each optionally replaced by F, b) 1,4-phenylene, in which one or two CH groups are each optionally replaced by N and in which, in addition, one or more H atoms are each optionally replaced by halogen, —CN, —CH 3 , —CHF 2 , —CH 2 F, —CF 3 , —OCH 3 , —OCHF 2 or —OCF 3 , c) bicyclo[1.1.1]pentane-1,3-diyl, bicyclo[2.2.2]octane-1,4-diyl, spiro-[3.3]heptane-2,6-diyl, naphthalene-2,6-diyl, naphthalene-2,7-diyl, decahydronaphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl, piperidine-1,4-diyl, phenanthrene-2,7-diyl, fluorene-2,7-diyl, anthracene-2,6-diyl, anthracene-2,7-diyl, or indane-2,5-diyl, where in each case one H atom or a plurality of H atoms are each optionally replaced by halogen, d) 1,4-cyclohexenylene or 1,3-cyclobutane-1,3-diyl; Z 1 and Z 2 are each, independently of one another, identically or differently, —O—, —CH 2 O—, —OCH 2 —, —CO—O—, —O—CO—, —CF 2 O—, —OCF 2 —, —CF 2 ═CF 2 —, —CH 2 ═CF 2 —, —CF 2 CH 2 —, —CH 2 CH 2 —, —CH═CH—, —CH═CF—, —CF═CH—, —CF═CF—, —CF═CF—COO—, —O—CO—CF═CF—, —C≡C—, —CH 2 CH 2 CF 2 O—, or a single bond; m is 0, 1, 2 or 3; and n is 1,2, or 3; wherein the Z 2 bridge group attached to group G is a single bond.