Pyridylpyrimidines, a process for their preparation and their use in liquid-crystalline mixtures

US5443754A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Claus Escher · Mühltal, DE
• Gerhard Illian · Frankfurt am Main, DE
• Wolfgang Hemmerling · Pocking, DE
• Rainer Wingen · Hattersheim, DE

Key dates

• Filing date: May 19, 1993
• Grant date: Aug 22, 1995
• Expiry date: May 19, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/406
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A pyridylpyrimidine compound of the formula (I) ##STR1## in which A is N and B is CH or A is CH and B is N PA1 C is N and D is CH or C is CH and D is N, PA1 R.sup.1 is, for example, chiral or achiral alkyl having 1 to 16 carbon atoms, PA1 R.sup.2 is, for example, , R.sup.1, PA1 X.sup.1, X.sup.2 are F, Cl or CN, and PA1 n, m are 0, 1 or 2, are components which are suitable for liquid-crystalline mixtures since they result in LC displays having favorable properties.