Liquid crystal mixture

A liquid crystal mixture comprising a compound of formula (IV)

• wherein
• R1 is H or a linear or branched alkyl group of 1 to 20 C atoms, or a linear or branched alkenyl group of 2 to 20 C atoms, wherein in either case optionally one —CH2— group is replaced by cyclohexylen-1,4-diyl, or one or two —CH2-groups optionally are replaced by —O—, if non-adjacent to N, or by —C(═O)—, or —Si(CH3)2—, and/or one or more H of the alkyl or alkenyl group optionally is replaced by F or CH3;
• R2 stands for
• a) H or F,
• b) a linear or branched alkyl group of 1 to 20 C atoms, or a linear or branched alkenyl group of 2 to 20 C atoms, wherein in either case one or two —CH2— groups optionally are replaced by —O—, —C(═O)O—, or —Si(CH3)2—, and/or one or more H of the alkyl or alkenyl group is replaced by F or CH3,
• c) a radical
• wherein independently from the respective meanings in (I)
• R3, R4, R5, R6 are, independently from another, an alkyl group of 1 to 8 C atoms;
• M2 represents a single bond, —OC(═O)—, —C(═O)O—, —OCH2—, or —NH—;
• A is
• a) a linear or branched alkan-α,ω-diyl group of 1 to 20 C atoms or alkene-α,ω-diyl group of 2 to 20 C atoms, optionally, if non-adjacent to M1 and M2, one or two non-adjacent —CH2— groups are replaced by —O—, or
• b)
• wherein
• p and q are 0, 1 or 2, wherein the sum of p+q is 1;
• M3 is a single bond or —OC(═O)—, —C(═O)O—, —OCH2—, —CH2O—, —C≡C—, —CH2CH2—, or —CH2CH2CH2CH2;
• are, independently from another, phenylen-1,4-diyl, which is optionally substituted by one, two or three F, or cyclohexan-1,4-diyl, which is optionally substituted by one CN, CH3 or F, or pyrimidin-2,5-diyl, which is optionally substituted by one F, pyridine-2,5-diyl, which is optionally substituted by one F, or naphthalene-2,6-diyl, which is optionally substituted by one, two or three F, or 1,2,3,4-tetrahydronaphthalene-2,6-diyl, wherein the aromatic ring is optionally substituted by one, two or three F, or decahydronaphthalene-2,6-diyl, or indane-2,5(6)-diyl, or fluorene-2,7-diyl, or phenanthrene-2,7-diyl, or 9,10-dihydrophenanthrene-2,7-diyl, or (1,3,4)thiadiazol-2,5-diyl, or (1,3)thiazol,2,5-diyl, or (1,3)thiazol-2,4-diyl, or thiophen-2,4-diyl, or thiophen-2,5-diyl, or (1,3)dioxan-2,5-diyl, or piperidin-1,4-diyl, or piperazin-1,4-diyl;
• X is H, OH, a linear or branched alkyl or alkyloxy group of 1 to 20 C atoms, wherein one or two —CH2— groups are optionally replaced by —O—, —C(═O)O—, or —Si(CH3)2—, and optionally one or more H are replaced by F or CH3;
• m is 0 or 1;
• and
• M1 is a single bond.

A compound of formula (I), (II), (Ill), or (IV)

• wherein
• R1 is H or a linear or branched alkyl group of 1 to 20 C atoms, or a linear or branched alkenyl group of 2 to 20 C atoms, wherein in either case optionally one —CH2— group is replaced by cyclohexylen-1,4-diyl, or one or two —CH2— groups optionally are replaced by —O—, if non-adjacent to N, or by —C(═O)—, or —Si(CH3)2—, and/or one or more H of the alkyl or alkenyl group optionally is replaced by F or CH3;
• R2 stands for
• a radical
• wherein independently from the respective meanings in (I)
• R3, R4, R5, R6 are, independently from another, an alkyl group of 1 to 8 C atoms;
• M1 represents a single bond, —OCH2—, or —NH—;
• M2 represents —C(═O)O—;
• A is
• wherein
• p and q are 0, 1 or 2, wherein the sum of p+q is 1;
• M3 is a single bond or —OC(═O)—, —C(═O)O—, —OCH2—, —CH2O—, —C≡C—, —CH2CH2—, or —CH2CH2CH2CH2—;
• are, independently from another, phenylen-1,4-diyl, which is optionally substituted by one, two or three F, or cyclohexan-1,4-diyl, which is optionally substituted by one CN, CH3 or F, or pyrimidin-2,5-diyl, which is optionally substituted by one F, pyridine-2,5-diyl, which is optionally substituted by one F, or naphthalene-2,6-diyl, which is optionally substituted by one, two or three F, or 1,2,3,4-tetrahydronaphthalene-2,6-diyl, wherein the aromatic ring is optionally substituted by one, two or three F, or decahydronaphthalene-2,6-diyl, or indane-2,5(6)-diyl, or fluorene-2,7-diyl, or phenanthrene-2,7-diyl, or 9,10-dihydrophenanthrene-2,7-diyl, or (1,3,4)thiadiazol-2,5-diyl, or (1,3)thiazol,2,5-diyl, or (1,3)thiazol-2,4-diyl, or thiophen-2,4-diyl, or thiophen-2,5-diyl, or (1,3)dioxan-2,5-diyl, or piperidin-1,4-diyl, or piperazin-1,4-diyl;
• X is H, OH, a linear or branched alkyl or alkyloxy group of 1 to 20 C atoms, wherein one or two —CH2— groups are optionally replaced by —O—, —C(═O)O—, or —Si(CH3)2—, and optionally one or more H are replaced by F or CH3;
• and
• m is 1;
• or
• X and M1-(A)m-M2-R2 together are
• a) a ring of 4 to 16 members, optionally substituted by an alkyl radical of 1 to 15 C atoms,
• b) a combination of two either directly linked or spiro-linked rings of, independently from another, 4 to 16 members, optionally substituted by an alkyl radical of 1 to 15 C atoms, wherein the rings, independently from another, are carbocycles or carbocycles comprising B, N, O or S heteroatoms;
• wherein
• R1 is H or alkyl of 1 to 12 C atoms;
• R2 is H, a linear or branched alkyl group of 1 to 16 C atoms, or linear or branched alkenyl group of 2 to 16 C atoms, wherein in either case one —CH2— group is optionally replaced by —O—, and optionally one or more H are replaced by F;
• M1 is —OC(═O)— or a single bond;
• M3 is a single bond;
• G1-G2 is —CH2—CH— or —CH═C—;
• p is 0 or 1;
• is phenylen-1,4-diyl, which is optionally substituted by one or two F, cyclohexylen-1,4-diyl, biphenyl-4,4′-diyl, which is optionally substituted by one or two F per ring, 1,1′-cyclohexylphenyl-4,4′-diyl, wherein the phenyl moiety is optionally substituted by one or two F, or 1,1′-phenylcyclohexyl-4,4′-diyl, wherein the phenyl moiety is optionally substituted by one or two F, or 1,1′-bicyclohexyl-4,4′-diyl;
• is phenylen-1,4-diyl, which is optionally substituted by one or two F, or cyclohexylen-1,4-diyl,
• with the provisos that
• a) R2 is H only in case p is 1;
• b) if p is 0, then R2 is a linear or branched alkyl group of 1 to 16 C atoms or linear or branched alkenyl group of 2 to 16 C atoms and
• is cyclohexylen-1,4-diyl;
• and
• c) -G1-G2- can be —CH═C— only in the case M1 is a single bond;
• wherein
• R1 is H or alkyl of 1 to 12 C atoms;
• R2 is H, a linear or branched alkyl group of 1 to 16 C atoms, or linear or branched alkenyl group of 2 to 16 C atoms, wherein in either case one —CH2— group is optionally replaced by —O—, and optionally one or more H are replaced by F;
• M1 is —OC(═O)— or a single bond;
• M3 is a single bond;
• G1-G2 is —CH2—CH— or —CH═C—;
• p is 0 or 1;
• is pyrimidin-2,5-diyl, pyridin-2,5-diyl, which is optionally ortho to N substituted by F, phenylen-1,4-diyl, which is optionally substituted by one or two F, or cyclohexylen-1,4-diyl, biphenyl-4,4′-diyl, which is optionally substituted by one or two F per ring, 1,1′-cyclohexylphenyl-4,4′-diyl, wherein the phenyl moiety is optionally substituted by one or two F, or 1,1′-phenylcyclohexyl-4,4′-diyl, wherein the phenyl moiety is optionally substituted by one or two F, or 1,1′-bicyclohexyl-4,4′-diyl;
• is phenylen-1,4-diyl, which is optionally substituted by one or two F, cyclohexylen-1,4-diyl, biphenyl-4,4′-diyl, which is optionally substituted by one or two F per ring, 1,1′-cyclohexylphenyl-4,4′-diyl, wherein the phenyl moiety is optionally substituted by one or two F, or 1,1′-phenylcyclohexyl-4,4′-diyl, wherein the phenyl moiety is optionally substituted by one or two F, or 1,1′-bicyclohexyl-4,4′-diyl, pyrimidin-2,5-diyl, or pyridin-2,5-diyl, which is optionally ortho to N substituted by F,
• with the provisos that
• a) one and only one of
• is pyrimidin-2,5-diyl or pyridine-2,5-diyl, which is optionally ortho to N substituted by F;
• and
• b) -G1-G2 can be —CH═C— only in case M1 is a single bond;
• wherein
• R1 is H or a linear or branched alkyl group of 1 to 20 C atoms, or a linear or branched alkenyl group of 2 to 20 C atoms, wherein in either case optionally one —CH2— group is replaced by cyclohexylen-1,4-diyl, or one or two —CH2-groups optionally are replaced by —O—, if non-adjacent to N, or by —C(═O)—, or —Si(CH3)2—, and/or one or more H of the alkyl or alkenyl group optionally is replaced by F or CH3;
• R2 stands for
• a radical
• wherein independently from the respective meanings in (I)
• R3, R4, R5, R6 are, independently from another, an alkyl group of 1 to 8 C atoms;
• M2 represents a single bond, —OC(═O)—, or —C(═O)O—;
• A is
• wherein
• p and q are 0, 1 or 2, wherein the sum of p+q is 1;
• M3 is a single bond or —OC(═O)—, —C(═O)O—, —OCH2—, —CH2O—, —C≡C—, —CH2CH2—, or —CH2CH2CH2CH2;
• are, independently from another, phenylen-1,4-diyl, which is optionally substituted by one, two or three F, or cyclohexan-1,4-diyl, which is optionally substituted by one CN, CH3 or F, or pyrimidin-2,5-diyl, which is optionally substituted by one F, pyridine-2,5-diyl, which is optionally substituted by one F, or naphthalene-2,6-diyl, which is optionally substituted by one, two or three F, or 1,2,3,4-tetrahydronaphthalene-2,6-diyl, wherein the aromatic ring is optionally substituted by one, two or three F, or decahydronaphthalene-2,6-diyl, or indane-2,5(6)-diyl, or fluorene-2,7-diyl, or phenanthrene-2,7-diyl, or 9,10-dihydrophenanthrene-2,7-diyl, or (1,3,4)thiadiazol-2,5-diyl, or (1,3)thiazol,2,5-diyl, or (1,3)thiazol-2,4-diyl, or thiophen-2,4-diyl, or thiophen-2,5-diyl, or (1,3)dioxan-2,5-diyl, or piperidin-1,4-diyl, or piperazin-1,4-diyl;
• X is H, OH, a linear or branched alkyl or alkyloxy group of 1 to 20 C atoms, wherein one or two —CH2— groups are optionally replaced by —O—, —C(═O)O—, or —Si(CH3)2—, and optionally one or more H are replaced by F or CH3;
• m is 1;
• and
• M1 is a single bond.

A compound of formula (I) or (IV)

• wherein
• R1 is H or a linear or branched alkyl group of 1 to 20 C atoms, or a linear or branched alkenyl group of 2 to 20 C atoms, wherein in either case optionally one —CH2— group is replaced by cyclohexylen-1,4-diyl, or one or two —CH2— groups optionally are replaced by —O—, if non-adjacent to N, or by —C(═O)—, or —Si(CH3)2—, and/or one or more H of the alkyl or alkenyl group optionally is replaced by F or CH3;
• R2 stands for
• a) F,
• b) a linear or branched alkyl group of 1 to 20 C atoms, or a linear or branched alkenyl group of 2 to 20 C atoms, wherein in either case one or two —CH2— groups optionally are replaced by —O—, —C(═O)O—, or —Si(CH3)2—, and/or one or more H of the alkyl or alkenyl group is replaced by F or CH3,
• c) a radical
• wherein independently from the respective meanings in (I)
• R3, R4, R5, R6 are, independently from another, an alkyl group of 1 to 8 C atoms;
• M1 represents —OCH2— or —NH—;
• M2 represents —OC(═O)—, —C(═O)O— or —NH—;
• A is
• wherein
• p and q are 0, 1 or 2, wherein the sum of p+q is 1;
• M3 is a single bond or —OC(═O)—, —C(═O)O—, —OCH2—, —CH2O—, —C≡C—, —CH2CH2—, or —CH2CH2CH2CH2—;
• are, independently from another, phenylen-1,4-diyl, which is optionally substituted by one, two or three F, or cyclohexan-1,4-diyl, which is optionally substituted by one CN, CH3 or F, or pyrimidin-2,5-diyl, which is optionally substituted by one F, pyridine-2,5-diyl, which is optionally substituted by one F, or naphthalene-2,6-diyl, which is optionally substituted by one, two or three F, or 1,2,3,4-tetrahydronaphthalene-2,6-diyl, wherein the aromatic ring is optionally substituted by one, two or three F, or decahydronaphthalene-2,6-diyl, or indane-2,5(6)-diyl, or fluorene-2,7-diyl, or phenanthrene-2,7-diyl, or 9,10-dihydrophenanthrene-2,7-diyl, or (1,3,4)thiadiazol-2,5-diyl, or (1,3)thiazol,2,5-diyl, or (1,3)thiazol-2,4-diyl, or thiophen-2,4-diyl, or thiophen-2,5-diyl, or (1,3)dioxan-2,5-diyl, or piperidin-1,4-diyl, or piperazin-1,4-diyl;
• X is H, OH, a linear or branched alkyl or alkyloxy group of 1 to 20 C atoms, wherein one or two —CH2— groups are optionally replaced by —O—, —C(═O)O—, or —Si(CH3)2—, and optionally one or more H are replaced by F or CH3;
• and
• m is 0 or 1;
• or
• X and M1-(A)m-M2-R2 together are
• a) a ring of 4 to 16 members, optionally substituted by an alkyl radical of 1 to 15 C atoms,
• b) a combination of two either directly linked or spiro-linked rings of, independently from another, 4 to 16 members, optionally substituted by an alkyl radical of 1 to 15 C atoms, wherein the rings, independently from another, are carbocycles or carbocycles comprising B, N, O or S heteroatoms;
• or
• wherein
• R1 is H or a linear or branched alkyl group of 1 to 20 C atoms, or a linear or branched alkenyl group of 2 to 20 C atoms, wherein in either case optionally one —CH2— group is replaced by cyclohexylen-1,4-diyl, or one or two —CH2-groups optionally are replaced by —O—, if non-adjacent to N, or by —C(═O)—, or —Si(CH3)2—, and/or one or more H of the alkyl or alkenyl group optionally is replaced by F or CH3;
• R2 stands for
• a) F,
• b) a linear or branched alkyl group of 1 to 20 C atoms, or a linear or branched alkenyl group of 2 to 20 C atoms, wherein in either case one or two —CH2— groups optionally are replaced by —C(═O)O—, or —Si(CH3)2—, and/or one or more H of the alkyl or alkenyl group is replaced by F or CH3,
• c) a radical
• wherein independently from the respective meanings in (I)
• R3, R4, R5, R6 are, independently from another, an alkyl group of 1 to 8 C atoms;
• M2 represents a single bond, or —C(═O)O—;
• A is
• wherein
• p and q are 0, 1 or 2, wherein the sum of p+q is 1;
• M3 is a single bond or —OC(═O)—, —C(═O)O—, —OCH2—, —CH2O—, —C≡C—, —CH2CH2—, or —CH2CH2CH2CH2;
• are, independently from another, phenylen-1,4-diyl, which is optionally substituted by one, two or three F, or cyclohexan-1,4-diyl, which is optionally substituted by one CN, CH3 or F, or pyrimidin-2,5-diyl, which is optionally substituted by one F, pyridine-2,5-diyl, which is optionally substituted by one F, or naphthalene-2,6-diyl, which is optionally substituted by one, two or three F, or 1,2,3,4-tetrahydronaphthalene-2,6-diyl, wherein the aromatic ring is optionally substituted by one, two or three F, or decahydronaphthalene-2,6-diyl, or indane-2,5(6)-diyl, or fluorene-2,7-diyl, or phenanthrene-2,7-diyl, or 9,10-dihydrophenanthrene-2,7-diyl, or (1,3,4)thiadiazol-2,5-diyl, or (1,3)thiazol,2,5-diyl, or (1,3)thiazol-2,4-diyl, or thiophen-2,4-diyl, or thiophen-2,5-diyl, or (1,3)dioxan-2,5-diyl, or piperidin-1,4-diyl, or piperazin-1,4-diyl;
• X is H, OH, a linear or branched alkyl or alkyloxy group of 1 to 20 C atoms, wherein one or two —CH2— groups are optionally replaced by —O—, —C(═O)O—, or —Si(CH3)2—, and optionally one or more H are replaced by F or CH3;
• m is 1;
• and
• M1 is a single bond.

A compound of formula (I) or (IV)

• wherein
• R1 is H or a linear or branched alkyl group of 1 to 20 C atoms, or a linear or branched alkenyl group of 2 to 20 C atoms, wherein in either case optionally one —CH2— group is replaced by cyclohexylen-1,4-diyl, or one or two —CH2— groups optionally are replaced by —O—, if non-adjacent to N, or by —C(═O)—, or —Si(CH3)2—, and/or one or more H of the alkyl or alkenyl group optionally is replaced by F or CH3;
• R2 stands for
• a) F,
• b) a linear or branched alkyl group of 1 to 20 C atoms, or a linear or branched alkenyl group of 5 to 20 C atoms, wherein in either case one or two —CH2— groups optionally are replaced by —Si(CH3)2—, and/or one or more H of the alkyl or alkenyl group is replaced by F or CH3,
• c) a radical
• wherein independently from the respective meanings in (I)
• R3, R4, R5, R6 are, independently from another, an alkyl group of 1 to 8 C atoms;
• M1 represents —OCH2—, or —NH—, and M2 represents —NH—, and if A denotes —C(═Y)— or —CHY—, then M1 and M2 represent —C(═O)O— and —OC(═O)—, respectively;
• A is
• wherein
• p and q are 0, 1 or 2, wherein the sum of p+q is 1;
• M3 is a single bond or —OC(═O)—, —C(═O)O—, —OCH2—, —CH2O—, —C≡C—, —CH2CH2—, or —CH2CH2CH2CH2—;
• are, independently from another, phenylen-1,4-diyl, which is optionally substituted by one, two or three F, or cyclohexan-1,4-diyl, which is optionally substituted by one CN, CH3 or F, or pyrimidin-2,5-diyl, which is optionally substituted by one F, pyridine-2,5-diyl, which is optionally substituted by one F, or naphthalene-2,6-diyl, which is optionally substituted by one, two or three F, or 1,2,3,4-tetrahydronaphthalene-2,6-diyl, wherein the aromatic ring is optionally substituted by one, two or three F, or decahydronaphthalene-2,6-diyl, or indane-2,5(6)-diyl, or fluorene-2,7-diyl, or phenanthrene-2,7-diyl, or 9,10-dihydrophenanthrene-2,7-diyl, or (1,3,4)thiadiazol-2,5-diyl, or (1,3)thiazol,2,5-diyl, or (1,3)thiazol-2,4-diyl, or thiophen-2,4-diyl, or thiophen-2,5-diyl, or (1,3)dioxan-2,5-diyl, or piperidin-1,4-diyl, or piperazin-1,4-diyl;
• X is H, OH, a linear or branched alkyl or alkyloxy group of 1 to 20 C atoms, wherein one or two —CH2— groups are optionally replaced by —O—, —C(═O)O—, or —Si(CH3)2—, and optionally one or more H are replaced by F or CH3;
• and
• m is 1;
• or
• X and M1-(A)m-M2-R2 together are
• a) a ring of 4 to 16 members, optionally substituted by an alkyl radical of 1 to 15 C atoms,
• b) a combination of two either directly linked or spiro-linked rings of, independently from another, 4 to 16 members, optionally substituted by an alkyl radical of 1 to 15 C atoms, wherein the rings, independently from another, are carbocycles or carbocycles comprising B, N, O or S heteroatoms,
• or
• wherein
• R1 is H or a linear or branched alkyl group of 1 to 20 C atoms, or a linear or branched alkenyl group of 2 to 20 C atoms, wherein in either case optionally one —CH2— group is replaced by cyclohexylen-1,4-diyl, or one or two —CH2-groups optionally are replaced by —O—, if non-adjacent to N, or by —C(═O)—, or —Si(CH3)2—, and/or one or more H of the alkyl or alkenyl group optionally is replaced by F or CH3;
• R2 stands for
• a) F,
• b) a linear or branched alkyl group of 1 to 20 C atoms, or a linear or branched alkenyl group of 5 to 20 C atoms, wherein in either case one or two —CH2— groups optionally are replaced by —C(═O)O—, or —Si(CH3)2—, and/or one or more H of the alkyl or alkenyl group is replaced by F or CH3,
• c) a radical
• wherein independently from the respective meanings in (I)
• R3, R4, R5, R6 are, independently from another, an alkyl group of 1 to 8 C atoms;
• M1 is a single bond;
• M2 represents a single bond, —OC(═O)—, or —C(═O)O—;
• if A denotes —C(═Y)— or —CHY—, then M1 and M2 represent —C(═O)O— and —OC(═O)—, respectively;
• A is
• i) —C(═Y)—, wherein Y is CH—Z, wherein Z is phenylen-1,4-diyl, optionally substituted by one to three halogen atoms, alkyl or alkyloxy groups of 1 to 4 C atoms, with the proviso that M1 and M2 are —C(═O)O— and —OC(═O)—, respectively,
• ii) —CHY—, wherein Y is CH2—Z, wherein Z is phenylen-1,4-diyl, optionally substituted by one to three halogen atoms, alkyl or alkyloxy groups of 1 to 4 C atoms, with the proviso that M1 and M2 are —C(═O)O— and —OC(═O)—, respectively,
• iii)
• wherein
• p and q are 0, 1 or 2, wherein the sum of p+q is 1;
• M3 is a single bond or —OC(═O)—, —C(═O)O—, —OCH2—, —CH2O—, —C≡C—, —CH2CH2—, or —CH2CH2CH2CH2;
• are, independently from another, phenylen-1,4-diyl, which is optionally substituted by one, two or three F, or cyclohexan-1,4-diyl, which is optionally substituted by one CN, CH3 or F, or pyrimidin-2,5-diyl, which is optionally substituted by one F, pyridine-2,5-diyl, which is optionally substituted by one F, or naphthalene-2,6-diyl, which is optionally substituted by one, two or three F, or 1,2,3,4-tetrahydronaphthalene-2,6-diyl, wherein the aromatic ring is optionally substituted by one, two or three F, or decahydronaphthalene-2,6-diyl, or indane-2,5(6)-diyl, or fluorene-2,7-diyl, or phenanthrene-2,7-diyl, or 9,10-dihydrophenanthrene-2,7-diyl, or (1,3,4)thiadiazol-2,5-diyl, or (1,3)thiazol,2,5-diyl, or (1,3)thiazol-2,4-diyl, or thiophen-2,4-diyl, or thiophen-2,5-diyl, or (1,3)dioxan-2,5-diyl, or piperidin-1,4-diyl, or piperazin-1,4-diyl;
• X is H, OH, a linear or branched alkyl or alkyloxy group of 1 to 20 C atoms, wherein one or two —CH2— groups are optionally replaced by —O—, —C(═O)O—, or —Si(CH3)2—, and optionally one or more H are replaced by F or CH3;
• and
• m is 1.

A compound of formula (IV),

• wherein
• R1 is H or a linear or branched alkyl group of 1 to 20 C atoms, or a linear or branched alkenyl group of 2 to 20 C atoms, wherein in either case optionally one —CH2— group is replaced by cyclohexylen-1,4-diyl, or one or two —CH2-groups optionally are replaced by —O—, if non-adjacent to N, or by —C(═O)—, or —Si(CH3)2—,
• and/or one or more H of the alkyl or alkenyl group optionally is replaced by F or CH3;
• R2 is a linear or branched alkyl group of 2 to 20 C atoms, or a linear or branched alkenyl group of 5 to 20 C atoms, wherein in either case one or two —CH2-groups optionally are replaced by —Si(CH3)2—, and/or one or more H of the alkyl or alkenyl group is replaced by F or CH3,
• or F
• or a radical
• R3, R4, R5, R6 are, independently from another, an alkyl group of 1 to 8 C atoms;
• M2 represents a single bond, —OC(═O)—, or —C(═O)O—;
• A is
• wherein
• p and q are 0, 1 or 2, wherein the sum of p+q is 1;
• M3 is a single bond or —OC(═O)—, —C(═O)O—, —OCH2—, —CH2O—, —C≡C—, —CH2CH2—, or —CH2CH2CH2CH2;
• are, independently from another, phenylen-1,4-diyl, which is optionally substituted by one, two or three F, or cyclohexan-1,4-diyl, which is optionally substituted by one CN, CH3 or F, or pyrimidin-2,5-diyl, which is optionally substituted by one F, pyridine-2,5-diyl, which is optionally substituted by one F, or naphthalene-2,6-diyl, which is optionally substituted by one, two or three F, or 1,2,3,4-tetrahydronaphthalene-2,6-diyl, wherein the aromatic ring is optionally substituted by one, two or three F, or decahydronaphthalene-2,6-diyl, or indane-2,5(6)-diyl, or fluorene-2,7-diyl, or phenanthrene-2,7-diyl, or 9,10-dihydrophenanthrene-2,7-diyl, or (1,3,4)thiadiazol-2,5-diyl, or (1,3)thiazol,2,5-diyl, or (1,3)thiazol-2,4-diyl, or thiophen-2,4-diyl, or thiophen-2,5-diyl, or (1,3)dioxan-2,5-diyl, or piperidin-1,4-diyl, or piperazin-1,4-diyl;
• X is H, OH, a linear or branched alkyl or alkyloxy group of 1 to 20 C atoms, wherein one or two —CH2— groups are optionally replaced by —O—, —C(═O)O—, or —Si(CH3)2—, and optionally one or more H are replaced by F or CH3;
• m is 1;
• and
• M1 is a single bond.