Cyanophenylpyri (MI)dine derivatives and liquid-crystalline medium

US5454975A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Volker Reiffenrath · Roßdorf, DE
• Matthias Bremer · Darmstadt, DE
• Michael Junge · Munich, DE

Key dates

• Filing date: Apr 1, 1994
• Grant date: Oct 3, 1995
• Expiry date: Apr 1, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/46
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Cyanopyrimidine derivatives of formula I ##STR1## in which R.sup.1 is an unsubstituted or at least mono-halogen-substituted alkyl or alkoxy radical having 1 to 15 carbon atoms, where one or more CH.sub.2 groups in these radicals may also, in each case independently of one another, be replaced by --CH.dbd.CH--, --O--, --S--, ##STR2## --CO--, --CO--O--, --O--CO-- or --O--CO--O-- in such a way that oxygen atoms are not linked directly to one another, PA1 X.sup.1, Y.sup.1 and Z.sup.1 are each, independently of one another, N or CF, PA1 X.sup.2, Y.sup.2 and Z.sup.2 are each, independently of one another, N, CF or CH, and PA1 n is 0, 1 or 2, PA1 with the proviso that at least one of the groups X.sup.1, Y.sup.1 and Z.sup.1 is N, can be used as components of liquid-crystalline media for electro-optical displays.