Hoffmann-la Roche Inc.

Rolic Ag

Other

Dainippon Ink and Chemicals, Incorporated

Alois Villiger

Martin Schadt

Richard Buchecker

Arthur Boller

Martin Petrzilka

Stephen Kelly

Alfred Germann

Jurg Funfschilling

Teodor Lukac

Frans Leenhouts

Hans-Jurgen Fromm

Haruyoshi Takatsu

Guy Marck

Klaus Schmitt

Erich Widmer

Roland Rich

Polymerisable optically active compounds have the general formula: ##STR1## where: W.sup.1 denotes a polymerisable residue,

Polymerisable, optically active dioxolane diesters

Objects of this invention are cyclopentyl compounds of the general formula ##STR1## wherein k signifies a whole number of 4 to 18;

Cyclopentyl derivatives

Liquid crystalline compounds having two dioxane rings, the dipole moments of which are unidirectional. These are compounds of the general formula ##STR1## wherein A and B each independently is cyclic or acyclic hydrophobic residues; and

Liquid crystalline di-1,3-dioxane derivatives

Compounds of the formula ##STR1## wherein rings A, B and C, Z.sup.1, Z.sup.2, Z.sup.3, R.sup.1, R.sup.2 and R.sup.3 are defined in the specification, their manufacture, liquid crystalline mixtures which contain such compounds and the use of these compounds for electro-optical purposes.

Tetracyclic compounds and liquid crystalline mixtures containing them

Compounds of the formula ##STR1## wherein X.sup.1 denotes fluorine or chlorine and X.sup.2 denotes hydrogen, fluorine or chlorine; R.sup.1 is 3E-alkenyl, 4-alkenyl, 2E-alkenyloxy or 3-alkenyloxy; n stands for the number 0 or 1; one of the groups Y.sup.1 and Y.sup.2 is a single covalent bond, --COO--, --OOC--, --CH.sub.2 CH.sub.2 --, --CH.sub.2 O-- or --OCH.sub.2 -- and the other of the groups Y.sup.1 and Y.sup.2 is a single covalent bond; and rings A.sup.1 and A.sup.2 each individually are substituted or unsubstituted trans-1,4-cyclohexylene, in which optionally 2 non-adjacent CH.sub.2 groups are replaced by oxygen, or substituted or unsubstituted 1,4-phenylene, in which optionally 1 CH group or 2 CH groups is/are replaced by nitrogen; with the proviso that X.sup.2 denotes fluorine or chlorine and/or Y.sup.1 or Y.sup.2 denotes --CH.sub.2 O-- or --OCH.sub.2 -- when simultaneously X.sup.1 is fluorine and R.sup.1 is 3E-alkenyl, and their use for liquid crystalline mixtures and electro-optical purposes.

Halobenzene liquid crystals

The present invention provides compounds of the general formula: ##STR1## wherein R is an alkyl group with 1 to 12 carbon atoms or a group of the formula ##STR2## Ring A.sup.1 is 1,4-phenylene, which is unsubstituted or substituted with fluorine, pyridine-2,5-diyl or pyrimidine-2,5-diyl;

Liquid crystal compounds

Compounds of the general formula ##STR1## wherein R.sup.1 represents vinyl or straight-chain alkenyl with 3 to 7 carbon atoms, the manufacture of such compounds, liquid crystalline mixtures which contain such compounds as well as the use of such compounds for electro-optical purposes.

Tricyclic fluorobenzonitrile derivatives

Compounds of the formula ##STR1## wherein R.sup.1 signifies a straight-chain alkyl group with 7 to 9 carbon atoms; and R.sup.2 represents a straight-chain alkyl group with 6 to 11 carbon atoms. their manufacture, liquid crystalline mixtures which contain these compounds and their use for electro-optical purposes.

Phenylpyridine derivatives and liquid crystalline mixtures containing

Compounds of the formula ##STR1## wherein A.sup.1 denotes a single covalent bond and A.sup.2 denotes 1,4-phenylene or trans-1,4-cyclohexylene or A.sup.1 denotes trans-1,4-cyclohexylene and A.sup.2 denotes a single covalent bond; X.sup.1 signifies fluorine or chlorine; X.sup.2 represents fluorine or, when X.sup.1 signifies chlorine, also hydrogen or chlorine; and R.sup.1 signifies 1E-alkenyl with 2 to 12 carbon atoms, their manufacture, liquid crystalline mixtures which contain such compounds and their use for electro-optical purposes.

Halophenyl substituted dioxanes

Compounds of the formula ##STR1## wherein Z.sup.1 denotes a single covalent bond or --CH.sub.2 Ch.sub.2 --; ring A.sup.1 represents 1,4-phenylene, pyrimidine-2,5-diyl, pyridine-2,5-diyl or, when Z.sup.1 stands for --CH.sub.2 CH.sub.2 --, also trans-1,4-cyclohexylene; X.sup.1 stands for fluorine or chlorine; X.sup.2 signifies fluorine, chlorine or hydrogen, with the proviso that X.sup.2 only signifies hydrogen when X.sup.1 is chlorine or when ring A.sup.1 signifies pyridine-2,5-diyl and Z.sup.1 signifies --CH.sub.2 CH.sub.2 --; and R.sup.1 signifies 1E-alkenyl with 2 to 12 carbon atoms, their manufacture, liquid crystalline mixtures which contain these compounds and their use for electro-optical purposes.

Alkenylcyclohexane liquid crystalline compounds

Optically active compounds of the formula ##STR1## wherein R.sup.1 and R.sup.2 each are alkyl with at least 2 carbon atoms; A.sup.1, A.sup.2 and A.sup.3 each are unsubstituted, cyano-, halogen- or methyl-substituted 1,4-phenylene, optionally having one or two CH groups replaced by nitrogen, unsubstituted, cyano- or methyl-substituted trans-1,4-cyclohexylene, the cyclohexylene optionally having one or two CH.sub.2 groups replaced by oxygen; Z.sup.1 and Z.sup.2 each are a single covalent bond, --COO--, --OOC--, --CH.sub.2 CH.sub.2 --, --OCH.sub.2 --, --CH.sub.2 O--, --C.tbd.C--, --COS-- or --SOC--; m stands for the number 0 or 1; n is an integer of 0 to 4; X is oxygen or a methylene group; and each C* represents a chiral carbon atom, one of the chiral carbon atoms has the R-configuration while the other has the S-configuration. The compounds are used in liquid crystalline mixtures to compensate the temperature dependence of the threshold potential of liquid crystal cells.

Optically active compounds used for liquid crystalline mixtures

Compounds of formula ##STR1## wherein Z is a single covalent bond or --CH.sub.2 CH.sub.2 --, and R.sup.1 is 1E-alkenyl with 2-12 carbon atoms, liquid crystalline mixtures containing them and their use for electro-optical purposes.

Liquid crystalline mixtures containing 3,4-difluorophenyl-substituted

Compounds of the formula ##STR1## wherein Z.sup.1 is a single covalent bond or --CH.sub.2 CH.sub.2 --, X.sup.1 is hydrogen, fluorine or chlorine and R.sup.1 is 1E-alkenyl with 2 to 12 carbon atoms, their preparation, liquid crystalline mixtures which contain these compounds and their use for electro-optical purposes.

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Basel, Switzerland

Alois Villiger