Carbocyclic six-membered ring compounds
AssigneeMerck Patent GmbH
InventorsKlaus Praefcke, Bernd Kohne, Wadi Poules, Rudolf Eidenschink, Bernhard Scheuble
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Abstract
Six-membered ring compounds of the formula I ##STR1## wherein A is a benzene or cyclohexane ring, X.sup.1 to X.sup.6 independently of one another in each case are H, --OR, --COOR, --SR, --SOR, --SO.sub.2 R or, if A is a cyclohexane ring, also --O--COR, and R is in each case an alkyl group which has up to 15 C atoms and in which one or two CH.sub.2 groups can be replaced by O atoms, at least three of the substituents X.sup.1 to X.sup.6 being other than H, can be used as constituents of discotic liquid-crystal phases for liquid-crystal display elements.
Claims13
A compound of the formula all-trans-Cy(O--COR).sub.6, Cy(OR).sub.6, Ph(SO.sub.2 R).sub.6, Cy(SO.sub.2 R).sub.6, Ph(SOR).sub.6, Cy(SOR).sub.6, Cy(SR).sub.6 or cis-1,3,5-Cy(O--COR).sub.3,
- wherein Cy.sub.6 is cyclohexane-1,2,3,4,5,6-hexayl, Cy.sub.3 is cyclohexane-1,3,5-triyl Ph is phenyl and R is in each case alkyl of 3 to 15 C-atoms or alkyl of 3-15 C-atoms wherein one or two CH.sub.2 groups are replaced by 0 atoms, and
- opposite substituents in cyclohexane compounds are in the equatorial and trans-space positions relative to one another.
Dependencies are inferred from the claim text.