Liquid crystal compounds

US4704227A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Joachim Krause · Dieburg, DE
• Andreas Wachtler · Griesheim, DE
• Reinhard Hittich · Seeheim-Jugenheim, DE
• Georg Weber · Langen (Hessen), DE
• Bernhard Scheuble · Alsbach, DE

Key dates

• Filing date: Feb 15, 1985
• Grant date: Nov 3, 1987
• Expiry date: Feb 15, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2019/3422
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Compounds of the formula I EQU R.sup.1 --A.sup.1 --Z.sup.1 --A.sup.2 --R.sup.2 I wherein PA1 R.sup.1 and R.sup.2 are each H, an alkyl, alkoxy, alkanoyl, alkanoyloxy or alkoxycarbonyl group with in each case 1-10 C atoms, F, Cl, Br, CN or R.sup.3 --A.sup.3 --Z.sup.2 --, PA1 A.sup.1 is --A--, --A.sup.4 --A--or --A--A.sup.4 --, PA1 A is a 1,3-dioxane-2,5-diyl or a 1,3-dithiane-2,5-diyl group, PA1 A.sup.2, A.sup.3 are each a 1,4-cyclohexylene, 1,3-dioxane-2,5-diyl, PA1 and A.sup.4 1,3-dithiane-2,5-diyl, piperidine-1,4-diyl or 1,4-bicyclo(2,2,2)octylene group, or a 1,4-phenylene, pyrimidine-2,5-diyl or pyridazine-3,6-diyl group which is unsubstituted or substituted by one or two F and/or Cl atoms and/or CH.sub.3 groups and/or CN groups, PA1 Z.sup.1 and Z.sup.2 are each --CO--O--, --O--CO--, --CH.sub.2 CH.sub.2 --, --OCH.sub.2 --, --CH.sub.2 O or a single bond and PA1 R.sup.3 is H, an alkyl, alkoxy, alkanoyl, alkanoyloxy or alkoxycarbonyl group with in each case 1-10 C atoms, F, Cl, Br or CN, with the proviso that PA2 (a) at least one group A.sup.2, A.sup.3 and/or A.sup.4 contains lateral substituents, PA2 (b) 1,3-dioxane-2,5-diyl and 1,3-dithiane-2,5-diyl groups are not substituted by a…