PHENYLCYCLOHEXANES AND A LIQUID-CRYSTALLINE MEDIUM

• US 20080173844A1
• Filed: 07/19/2007
• Published: 07/24/2008
• Est. Priority Date: 08/16/1989
• Status: Abandoned Application

• Current Assignee: Andreas Wachtler, Bernhard Reiger, David Coates, Eike Poetsch, Herbert Plach, Joachim Krause, Reinhard Hittich
• Original Assignee: Andreas Wachtler, Bernhard Reiger, David Coates, Eike Poetsch, Herbert Plach, Joachim Krause, Reinhard Hittich
• Inventors: Poetsch, Eike, Coates, David, Krause, Joachim, Hittich, Reinhard, Reiger, Bernhard, Wachtler, Andreas, Plach, Herbert
• Application Number:
  US11/780,227
• Publication Number:
  US 20080173844A1
• Time in Patent Office: Days
• US Class Current: 252/299.63
• CPC Class Codes: C07C 17/2635 involving a phosphorus compound, e.g. Wittig synthesis
• CPC Class Codes: C07C 22/08 containing fluorine
• CPC Class Codes: C07C 25/24 Halogenated aromatic hydrocarbons with unsaturated side chains
• CPC Class Codes: C07C 25/28 Halogenated styrenes
• CPC Class Codes: C07C 255/50 to carbon atoms of non-condensed six-membered aromatic rings
• CPC Class Codes: C07C 2601/14 The ring being saturated
• CPC Class Codes: C07C 43/225 containing halogen
• CPC Class Codes: C09K 19/3003 Compounds containing at least two rings in which the different rings are directly linked (covalent bond)
• CPC Class Codes: C09K 2019/0444 characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group
• CPC Class Codes: C09K 2323/00 Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition

Abstract

Novel phenylcyclohexanes of the formula I

in which n is 0 to 7, Q¹ and Q² are H, or one of these radicals is alternatively CH₃, r is 0, 1, 2, 3, 4 or 5, A is trans-1,4-cyclohexylene, 1,4-phenylene, 3-fluoro-1,4-phenylene or a single bond, X is F, Cl, —CF₃, —CN, —OCF₃ or —OCHF₂, and Y and Z are each, independently of one another, H or F, with the proviso that, in the case where A is a single bond, Q¹=Q²=H and simultaneously X=CN, Y and/or Z are F.

Claims

1. Phenylcyclohexanes of the formula I

2. Phenylcyclohexanes according to claim 1, characterized in that X is F, Cl, —

CF₃ or —

OCF₃.

3. Phenylcyclohexanes according to claim 1, characterized in that Y=Z=H.

4. Phenylcyclohexanes according to claim 1, characterized in that Y═

F and Z=H or F.

5. Phenylcyclohexanes according to claim 1, characterized in that X═

CN, Y═

F and Z=H or F.

6. Use of the phenylcyclohexanes of the formula I according to claim 1 as components of liquid-crystalline media for electrooptical displays.

7. Liquid-crystalline for electrooptical displays having at least two liquid-crystalline components, characterized in that at least one component is a phenylcyclohexane of formula I according to claim 1.

8. Electrooptical display based on a liquid crystal cell, wherein the liquid-crystal cell contains a medium according to claim 7.